Author: Pensoft Editorial Team

Flora of Cameroon: Annonaceae Vol 45 available in print, as well as Open Access format with PhytoKeys

While every Flora publication is an incredibly valuable scientific resource, Vol. 45 is the first in the series to be made available in digital format, following its publication in the open-access journal PhytoKeys

The 45th volume of the Flora of Cameroon pilots a novel “Flora” section in the journal to promote accessibility and novelty in plant taxonomy

Dedicated to Annonaceae, the 45th volume of the Flora of Cameroon is the result of over 15 years of work on the systematics of this major pantropical group, commonly known as the Custard apple family or the Soursop family, and its diversity in one of the most biodiverse African countries, whose flora has remained understudied to this date.

In their publication, the authors: Thomas L. P. Couvreur, Léo-Paul M. J. Dagallier, Francoise Crozier, Jean-Paul Ghogue, Paul H. Hoekstra, Narcisse G. Kamdem, David M. Johnson, Nancy A. Murray and Bonaventure Sonké, describe 166 native taxa representing 163 species in 28 native genera, including 22 species known solely from Cameroon. The team also provides keys to all native genera, species, and infraspecific taxa, while a detailed morphological description and a distributional map are provided for each species.

Specimen of Uvariastrum zenkeri from Cameroon. Photo by Thomas L.P. Couvreur.

Amongst the findings featured in the paper is the discovery of a previously unknown species of a rare tree that grows up to 6 metres and is so far only known from two localities in Cameroon. As a result of their extensive study, the authors also report that the country is the one harbouring the highest number of African species for the only pantropical genus of Annonaceae: Xylopia.

While every Flora publication presents an incredibly valuable scientific resource due to its scale and exhaustiveness, what makes Volume 45 of the Flora of Cameroon particularly special and important is that it is the first in the series to be made available in digital format, following its publication in the peer-reviewed, open-access journal PhytoKeys. 

Available in the open-access scholarly journal PhytoKeys, the latest volume of the Flora of Cameroon features perks like displaying occurrences of treated taxa side-by-side when reading the publication in HTML.

As such, it is not only available to anyone, anywhere in the world, but is also easily discoverable and minable online, as it benefits from the technologically advanced publishing services provided by the journal that have been specially designed to open up biodiversity data. While the full-text publication is machine-readable, hence discoverable by search algorithms, various data items, such as nomenclature, descriptions, images and occurrences, are exported in relevant specialised databases (e.g. IPNI, Plazi, Zenodo, GBIF). In their turn, the readers who access the HTML version of the publication may enjoy the benefits of this semantically enriched format, as they navigate easily within the text, and access further information about the mentioned and hyperlinked taxa.

In fact, the Annonaceae contribution is the first to use the newly launched publication type in PhytoKeys: Flora.

Yet, to keep up with the much treasured tradition, the new publication is also available in print format, accompanied by its classic cover design.

In the field: Narcisse G. Kamdem (Université de Yaoundé I, Cameroon), co-author of the Flora of Cameroon – Annonaceae Vol 45. Photo by Thomas L.P. Couvreur.

When we spoke with the team behind the Flora, we learnt that they are all confident that  having the new volume in both print and open-access digital formats, is expected to rekindle the interest in the series, especially amongst younger botanists in Cameroon.

“The hybrid publication is a response to the reluctance to publish new volumes of these series. The hybrid version pioneered in Volume 45, is an opportunity for any scientist to freely access this fundamental work, and eventually use it in future studies. Also, the online and open access format is intended to stimulate botanists to author family treatments without the fear of not having their work published online in an academic journal with an Impact Factor,”

says Dr. Jean Michel Onana, editor and reviewer of the Flora, former Director of the National Herbarium of Cameroon, and a researcher at the Université de Yaoundé 1, Cameroon.

“The chosen format marks a qualitative leap in the presentation of the Flora of Cameroon and will be of interest to young botanists, who until now might have found the old presentation of the Flora unrewarding,” adds Prof. Bonaventure Sonké, last author and Head of the Biology Department of the Université de Yaoundé 1, Cameroon.

In the field: Prof. Bonaventure Sonké, last author and Head of the Biology Department of the Université de Yaoundé 1. Photo by Thomas L.P. Couvreur.

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As an extensive contribution to a previously understudied area of research, the value of the new publication goes beyond its appreciation amongst plant taxonomists.

“The Flore du Cameroun series is considered as a showcase of the National Herbarium of Cameroon, which promotes knowledge of the flora of Cameroon at all levels. Being able to identify plants and trees is the first and foremost step to addressing the issue of ill-management of forest regions in Cameroon and the Congo Basin as a whole. If planning continues to rely on badly made identification, the forecasts about our resources are not good at all,” says Prof. Jean Betti Largarde, Head of the National Herbarium of Cameroon, and Editor-in-Chief of the Flora of Cameroon.

Narcisse G. Kamdem, co-author of the Flora of Cameroon. Photo by Thomas L.P. Couvreur.

“Plant taxonomy is the basic discipline for the knowledge, conservation and sustainable management of biodiversity, including animals, plants and habitats. Young Cameroonian botanists, privileged to having such floristic richness in their country, are invited to take an interest in it. This is the field that opens the mind and makes it possible to address all other aspects of botanical research and development in relation to natural resources,”

adds Jean Michel Onana.

Research article:

Specimen of Sirdavidia solanona in its natural habitat. Photo by Thomas L.P. Couvreur.

Couvreur TLP, Dagallier L-PMJ, Crozier F, Ghogue J-P, Hoekstra PH, Kamdem NG, Johnson DM, Murray NA, Sonké B (2022) Flora of Cameroon – Annonaceae Vol 45. PhytoKeys 207: 1-532. https://doi.org/10.3897/phytokeys.207.61432

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Three new species of ground snakes discovered under graveyards and churches in Ecuador

The new snakes, which are small and cylindrical, were named in honor of institutions or people supporting the exploration of remote cloud forests in the tropics.

A group of scientists led by Alejandro Arteaga, grantee of The Explorers Club Discovery Expeditions and researcher at Khamai Foundation, discovered three new cryptozoic (living underground) snakes hidden under graveyards and churches in remote towns in the Andes of Ecuador. The discovery was made official in a study published in the journal ZooKeys. The new snakes, which are small, cylindrical, and rather archaic-looking, were named in honor of institutions or people supporting the exploration and conservation of remote cloud forests in the tropics.

Atractus michaelsabini was found hidden besides a church in the Andean town Guanazán, El Oro province, Ecuador. Photo by Amanda Quezada

Believe or not, graveyards are also land of the living. In the Andes of Ecuador, they are inhabited by a fossorial group of snakes belonging to the genus Atractus. These ground snakes are the most species-rich snake genus in the world (there are now 150 species known globally), but few people have seen one or even heard about their existence. This is probably because these serpents are shy and generally rare, and they remain hidden throughout most of their lives. Additionally, most of them inhabit remote cloud forests and live buried underground or in deep crevices. In this particular case, however, the new ground snakes where found living among crypts.

General view of a graveyard in Amaluza, Azuay province, Ecuador. Photo by Alejandro Arteaga

The discovery of the three new species took place rather fortuitously and in places where one would probably not expect to find these animals. The Discovery Ground Snake (Atractus discovery) was found hidden underground in a small graveyard in a remote cloud forest town in southeastern Ecuador, whereas the two other new species were found besides an old church and in a small school. All of this seems to suggest that, at least in the Andes, new species of snakes might be lurking just around the corner.

Unfortunately, the coexistence of ground snakes and villagers in the same town is generally bad news for the snakes. The study by Arteaga reports that the majority of the native habitat of the new snakes has already been destroyed. As a result of the retreating forest line, the ground snakes find themselves in the need to take refuge in spaces used by humans (both dead and alive), where they are usually killed on sight.

Atractus zgap. Photo by Alejandro Artaga.

Diego Piñán, a teacher of the town where one of the new reptiles was found, says: “when I first arrived at El Chaco in 2013, I used to see many dead snakes on the road; others where hit by machetes or with stones. Now, after years of talking about the importance of snakes, both kids and their parents, while still wary of snakes, now appreciate them and protect them.” Fortunately, Diego never threw away the dead snakes he found: he preserved them in alcohol-filled jars and these were later used by Arteaga to describe the species as new to science.

A jar full of Atractus snakes. Photo by Alejandro Arteaga

In addition to teaching about the importance of snakes, the process of naming species is important to create awareness about the existence of a new animal and its risk of extinction. In this particular case, two of the new snakes are considered to be facing a high risk of extinction in the near future.

The discovery process also provides an opportunity to recognize and honor the work of the people and institutions fighting to protect wildlife.

Alejandro Arteaga examines the holotype of Atractus discovery. He had to examine hundreds museum specimens before confirming the new species as such. Photo by David Jácome

Atractus discovery was named to honor The Explorers Club Discovery Expedition Grants initiative, a program seeking to foster scientific understanding for the betterment of humanity and all life on Earth and beyond. The grant program supports researchers and explorers from around the world in their quest to mitigate climate change, prevent the extinction of species and cultures, and ensure the health of the Earth and its inhabitants.

Atractus zgap. Photo by Alejandro Arteaga

Atractus zgap was named in honor of the Zoological Society for the Conservation of Species and Populations (ZGAP), a program seeking to conserve unknown but highly endangered species and their natural habitats throughout the world. The ZGAP grant program supports the fieldwork of young scientists who are eager to implement and start conservation projects in their home countries.

Atractus discovery. Photo by Alejandro Arteaga

Atractus michaelsabini was named in honor of a young nature lover, Michael Sabin, grandson of American philanthropist and conservationist Andrew “Andy” Sabin. Through the conservation organization Re:wild, the Sabin family has supported field research of threatened reptiles and has protected thousands of acres of critical habitat throughout the world.

“Naming species is at the core of biology”, says Dr. Juan M. Guayasamin, co-author of the study and a professor at Universidad San Francisco de Quito. “Not a single study is really complete if it is not attached to the name of the species, and most species that share the planet with us are not described.”

“The discovery of these new snakes is only the first step towards a much larger conservation project,” says Arteaga. “Now, thanks to the encouragement of ZGAP, we have already started the process of establishing a nature reserve to protect the ground snakes. This action would not have been possible without first unveiling the existence of these unique and cryptic reptiles, even if it meant momentarily disturbing the peace of the dead in the graveyard where the lived.”

Research article:

Arteaga A, Quezada A, Vieira J, Guayasamin JM (2022) Leaving no stone unturned: three additional new species of Atractus ground snakes (Serpentes, Colubridae) from Ecuador discovered using a biogeographical approach. ZooKeys 1121: 175-210. https://doi.org/10.3897/zookeys.1121.89539

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Scientists reveal the true identity of a Chinese octopus

Locals and fishermen had long been familiar with the species, but they kept mistaking it for a different species.

As they were collecting cephalopod samples in Dongshan island in China’s Fujian Province, a team of researchers came across an interesting finding: a new-to-science species of octopus.

A live individual of Callistoctopus xiaohongxu.

Actually, locals and fishermen have long been familiar with the species -but they kept mistaking it for a juvenile form of the common long-arm octopus (‘Octopus’ minor), whose trade is widespread throughout the country.

Only when a team of scientists from the Ocean University of China collected a batch of specimens misidentified by locals from Dongshan Seafood Market Pier as ‘O’. minor to study them, did it become apparent that this was in fact a separate, new species. That’s how it got its own name, Callistoctopus xiaohongxu, and a scientific description published in the open-access journal ZooKeys.

A live individual of Callistoctopus xiaohongxu.

The scientific name xiaohongxu is a phonetic translation of the local Chinese name of this species in Zhangzhou, where it was collected. It is a reference to its smooth skin and reddish-brown colour, which are among its most distinctive features. At less than 40 g in its adult stage, C. xiaohongxu is considered a small to moderate-sized octopus.

A net-like web structure on Callistoctopus xiaohongxu.

The researchers also note that this is the first new species of the genus Callistoctopus to be found in the China Seas.

More than 130 different cephalopod species are recorded in Chinese waters. Тhe southeast waters of China, due to the influence of strong warm currents, provide ideal environmental conditions to generate abundant marine biodiversity, and the finding of C. xiaohongxu further confirms the high diversity of species in the southeast China sea, the researchers said.

Research article:

Zheng X, Xu C, Li J (2022) Morphological description and mitochondrial DNA-based phylogenetic placement of a new species of Callistoctopus Taki, 1964 (Cephalopoda, Octopodidae) from the southeast waters of China. ZooKeys 1121: 1-15. https://doi.org/10.3897/zookeys.1121.86264

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Swimmer’s Itch: what causes this neglected snail-borne disease?

A new study suggests that a cercarial dermatitis outbreak in South Thailand was caused by the blood fluke Schistosoma indicum.

Cercarial dermatitis, also known as swimmer’s itch or clam-digger’s itch, is caused by the larvae of blood flukes that are parasites of birds or mammals. When these larvae, called cercariae, penetrate human skin, they trigger an allergic reaction within 10-15 hours that takes about a week to heal. Unable to mature into adults, the larvae then die on the skin. The gravity of an outbreak depends on how humans and birds or mammals come in contract with the aquatic environment, but people engaged in water activities, such as farmers, fishermen, and agricultural workers, are most likely to be affected.

Cercarial dermatitis cases from Chana district, October 2020

Between August and October 2020, a cercarial dermatitis outbreak with 359 confirmed cases occurred in Chana district, Songkhla Province, South Thailand. It mostly affected rice farmers from the area, who were busy with cultivation during the rainy season. Following a short investigation, three cases of patients were confirmed to be cercarial infections by skin biopsy (Bureau of Epidemiology, Department of Disease Control, Ministry of Public Health, Thailand).

“The study of intermediate host and definitive host in the outbreak area are important for the control program of snail-borne disease,” the researchers argue in their research paper, which was published in the open-access scientific journal Evolutionary Systematics.

Having studied six snail species from the area, they found out that two were infected, each with three different species of flatworms. The cercarial dermatitis outbreak was due to ruminant parasites, such as the blood fluke Schistosoma indicum, which often uses domestic animals as its host.

Collected snails from five locations of cercarial dermatitis outbreak area. a. Filopaludina s. peninsularis b. Filopaludina s. polygramma c. Indoplanorbis exustus d. Filopaludina m. cambodjensis e. Bithynia s. siamensis f. Pomacea canaliculata (Scale bar: 1 cm).

“Ruminant-infecting trematodes, namely, S. indicum and S. spindale, cause a hepato-intestinal schistosomiasis resulting in reduced milk yield,” the authors explain. “This occurrence of S. indicum and S. spindale implies the spread of cattle blood fluke cercariae in aquatic environments.”

“Additionally, these species of the S. indicum group primarily cause cercarial dermatitis in humans, which has become an important public health issue for people living in endemic regions.”

“In South India and Southeast Asia, where S. indicum and S. spindale have been reported to be widespread, they caused major pathology and mortality to livestock, leading to welfare and socio-economic issues, predominantly among poor subsistence farmers and their families.”

Image of Schistosoma indicum Montgomery, 1906 (Syn. S. nasalis Rao, 1933) a. Head organ of cercaria stained with 0.5% neutral red (DIC microscopy) b. Body part of cercaria stained with 0.5% neutral red (DIC microscopy) c. Image of unstained cercaria (DIC microscopy) d. Images of cercaria stained with 0.5% neutral red (DIC microscopy) e. Drawing of cercaria structure f. Images of sporocyst stained with 0.5% neutral red (light microscopy) Abbreviations: c: cercaria, eb: excretory bladder, ep: esophagus, fu: furca, h: head organ, i: intestine, pg: penetration gland, sp: sporocyst, ta: tail, vs: ventral sucker.. (Scale bars: 100 μm).

Some of the other worm species they found parasitized the intestines of fish, mammals, or birds, while others caused anemia and even death in ruminant animals.

“The results of this study will provide insights into the parasite species that cause cercarial dermatitis and may improve our understanding of public health problems in the outbreak and agricultural vicinity areas,” the authors of the study say. “In addition, the sequence data generated here are the first S. indicum DNA sequences from Thailand, which will be useful for further genetic study of the other blood flukes in this region.”

Research article:

Krailas D, Namchote S, Komsuwan J, Wongpim T, Apiraksena K, Glaubrecht M, Sonthiporn P, Sansawang C, Suwanrit S (2022) Cercarial dermatitis outbreak caused by ruminant parasite with intermediate snail host: schistosome in Chana, South Thailand. Evolutionary Systematics 6(2): 151-173. https://doi.org/10.3897/evolsyst.6.87670

Images by Professor Dr. Duangduen Krailas.

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First discovery of microplastics from water trapped on plant leaves

“These phytotelmata are very small and have a short lifespan. The question is, therefore, how were they polluted with microplastics?”

Although they have not been around for long, microplastics have found their way to almost every ecosystem on the planet. They have been discovered in the soil, in rivers, in our food and bottled water, and even in the human body. Recently, a team of researchers found, for the first time, microplastics in water trapped in plant leaf axils.

The teasel Dipsacus.

Katarína Fogašová, Peter Manko, and Jozef Obona of the University of Prešov, Slovakia, initially set out to Eastern Slovakia to study the organisms living in the little water puddles forming in teasel leaf axils. 

Teasels of the genus Dipsacus have characteristic opposite leaves that grow on the stem above each other in several levels. As they clasp the stem, they form cup-like structures that collect water, known as telmata. 

“Teasel phytotelmata are a relatively common but overlooked aquatic microcosm with a very short-term occurrence of only 3 to 4 months.“

To their surprise, they found differently coloured fragments and fibers, some reaching 2.4 mm in length, which were identified as microplastics.

“These phytotelmata are very small and have a short lifespan,” the researchers write in their paper, which was published in the journal BioRisk. “The question is, therefore, how were they polluted with microplastics?”

Phytotelmata provided by teasel.

No other sources of contaminants were found in the studied area, so the fragments and fibers most likely came from polluted atmosphere, they suggest. Another theory is that snails may have transported them from the soil or from other plants, in or on their bodies. 

“The first finding of microplastics in small short-term water reservoirs created by plants is further evidence that contamination of this kind spreads through various pathways and probably no environment on Earth is safe, which of course makes our discovery quite disheartening,” the researchers say.

“On the other hand, the results of our research of teasel phytotelmata, as a very unusual and highly specific natural environment, offer many possibilities for use in researching the spatio-temporal characteristics of the spread of microplastic pollution and its potential impact on the plants themselves, as well as organisms bound to them by ecological relations.”

They suggest that, due to their abundance and theoretical ability to capture microplastics in several ways from the environment, teasel phytotelmata could be a good indicator of microplastic presence.

“Our publication therefore not only brings the first discovery of microplastic pollution of habitats of this type, but also the first proposal of a new approach to the use of teasel phytotelmata and similar micro-ecosystems provided by plants (or artificially created), as bioindicators of the presence of microplastics in the environment, possible sources and pathways of their spread through the environment and spatio-temporal changes in microplastic contamination.”

Research article:

Fogašová K, Manko P, Oboňa J (2022) The first evidence of microplastics in plant-formed fresh-water micro-ecosystems: Dipsacus teasel phytotelmata in Slovakia contaminated with MPs. BioRisk 18: 133-143. https://doi.org/10.3897/biorisk.18.87433

Images by Katarína Fogašová.

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Invasive species denialism: what is it, and what can we do about it?

Even when there is agreement on the impacts of invasive species on ecosystems, some stakeholders nevertheless deny the need for, or benefit of managing invasive species.

Guest blog post by Noelle G. Stratton, Nicholas E. Mandrak, and Nicole Klenk

Invasive species denialism (ISD) is a hot topic in recent invasion ecology discourse. Many of us are familiar with the concept of science denialism, particularly during recent discussions about climate change and the ongoing COVID-19 pandemic. Essentially, a person who exhibits science denialism is skeptical of, or refuses to believe, the scientific facts about a topic. Much of the discussion about ISD has focused on characterising it as a form of science denialism. However, while science denialism may be one form of ISD, it is not the only one.

Understanding the different forms of ISD is an important step in learning more about what drives ISD positions, and how those positions can be overcome to improve invasive species management. Recently, researchers at the University of Toronto outlined these ISD forms in a new paper in NeoBiota. While these framings are not the only ways to characterize invasive species denialism, they demonstrate that there are multiple framings to the ways that people deny the imperative to manage all invasive species as prescribed by early detection and rapid response.

So, what are the forms of ISD?

Venn diagram of the three forms of invasive species based on interviews and focus groups with invasive species community members in the Great Lakes region, including interested publics and decision-makers: 1) Invasive species denialism; 2) invasive species cynicism; and 3) invasive species nihilism. Each has different motivations and ways of talking about invasive species. Notably, all forms include an opposition to invasive species engagement or management efforts.

Invasive species denialism is the form that will typically come to mind when you picture a “science denialist”. Someone who does not believe in invasive species, or says that the existing scientific literature is all wrong, would fall within this framing. However, it is more complex than that. Invasive species practitioners also identified some of those who believed in invasive species and supported their management under this framing.

For example, folks who wanted management to happen immediately, be 100% effective, or have no risks to them or the environment whatsoever, were considered another form of denialist. This is because while these people supported invasive species management, they were still opposed to certain management efforts due to a lack of understanding of the science behind that management. Similarly, people who agree invasive species are a problem but say “this isn’t my problem, and I shouldn’t have to do anything about it” when shown evidence otherwise were also framed as denialists, as it again indicated a denial, or at least a lack of understanding of the scientific facts.

Invasive species cynicism is the form where someone may well understand what invasive species are and the science behind their management. However, they may still oppose management because they believe it will harm them in some way.

For example, someone who does not want to have to check and clean their boat to prevent an invasive species spread because it takes too much time would be categorized as an invasive species cynic. As well, someone who does not want to cooperate with management efforts because they personally like a particular invasive species and would like it to persist, despite knowing its potential for harms to the ecosystem or economy, is also an invasive species cynic. From these examples, it should be clear that this form of ISD is quite different from what we would think of as a “science denialist”. They understand the science, but it just does not motivate their beliefs or behaviour on this topic.

This research was also recently presented at the International Conference on Aquatic Invasive Species by co-author Noelle G. Stratton. Invasive species nihilism, in particular, prompted discussion both in-person and on social media.

Invasive species nihilism is the form that does not appear to take into account the science behind invasive species or their management at all. Rather, it revolves around the idea that invasive species research, management, or engagement are essentially a waste of time. The efforts were pointless and the results useless. This framing also differed from the other two forms in that the folks who expressed these beliefs often directly approached invasive species practitioners during the course of their work to inform them that their job was meaningless and to ask them why they bothered. This type of framing has the greatest potential to impact invasive species researchers and practitioners personally, and it is potentially the most difficult form of denialism to surmount during engagement and management efforts.

How can invasive species denialism impact management efforts?

ISD has the potential to hinder management efforts in a few different ways. Invasive species denialists may slow down decision-making by stalling or halting discussions with other stakeholders. In some cases, invasive species cynics have taken direct action to interfere with the implementation of policies that would aid with management efforts. Invasive species nihilism could make some stakeholders less likely to engage with managers because they have come to believe that management is pointless, and managers themselves may endure the stress of hearing that their work is not of value to people with this perspective. The effects that ISD may have on management are varied and depend largely on the type of framing of ISD being used. Similarly, the way that we respond to someone that we believe to be an invasive species denialist should be informed by the framing of ISD they are using.



“An understanding of these framings is also vital to respond to instances of ISD appropriately. Whether we are being confronted with anti-science contrarianism, environmental cynicism, or outbursts of nihilism, should inform our responses and our strategies to counter these positions.” (Stratton et al. 2022)

The framings of ISD explored in this research suggest that a diversity of interpretations of species movements, and value judgments about their impacts and the need for management, exist. This has the potential to problematize reductionist claims that all critiques of invasive species management are simply a denial of scientific facts. These results provide evidence that even when there is agreement on the impacts of invasive species on ecosystems, some stakeholders nevertheless deny the need for, or benefit of managing invasive species. This study further contributes to ongoing scholarly and practitioner conversations about the normative assumptions of invasive species biology and their implications for invasive species management and governance.

Research article:

Stratton NG, Mandrak NE, Klenk N (2022) From anti-science to environmental nihilism: the Fata Morgana of invasive species denialism. NeoBiota 75: 39-56. https://doi.org/10.3897/neobiota.75.90631

Image credits: diagram by NG Stratton; comic panels by NG Stratton, via material from Flickr (ChrisA1995, CC BY 2.0; Mike, CC BY-NC-SA 2.0; the-difference CC BY-NC-SA 2.0) and Studio Alternativi (Esetefania Quevedo).

Celebrating excellence in plant systematics research: Phytokeys’ 200th issue

For almost 12 years now, PhytoKeys has been providing high-quality, peer-reviewed resources on plant taxonomy, phylogeny, biogeography and evolution, freely available open access.

PhytoKeys, Pensoft’s open-access, peer-reviewed botany systematics journal, has been around for over a decade. Since its launch in 2010, it has published almost 30,000 pages in more than 1,200 works. As PhytoKeys hits the milestone of its 200th issue – which presented a monograph of wild and cultivated chili peppers – there’s plenty to look back to.

For almost 12 years now, PhytoKeys has been providing high-quality, peer-reviewed resources on plant taxonomy, phylogeny, biogeography and evolution, freely available open access.

As our flagship botany journal, PhytoKeys is part of our concerted effort to help advance taxonomic studies. The more we know about biodiversity, the better we are equipped to protect it.

This is why, in a time when so many species are getting wiped out from the face of the Earth before we even become aware of their existence, it is truly exciting that we can sometimes be the bearer of good news.

Issue #150 of PhytoKeys marks a decade of revolutionising open plant systematics

Take the story of Gasteranthus extinctus from Ecuador – doesn’t its name sound a lot like extinct to you? That’s because the scientists named it based on specimens collected some 15 years earlier. So, they suspected that during the time in between, the species had already become extinct.

Yet, this is a happy-ending story: in a surprising turn of events, the plant was rediscovered 40 years after its last sighting. Gasteranthus extinctus is the hopeful message that we all needed: there’s still so much we can do to protect biodiversity.

Long believed to have gone extinct, Gasteranthus extinctus was found growing next to a waterfall at Bosque y Cascada Las Rocas, a private reserve in coastal Ecuador containing a large population of the endangered plant. Photo by Riley Fortier.

Over the time, we saw some ground-breaking botany research. We welcomed some record-breaking new plant species, such as the 3.6-meter-tall begonia, and the smallest Rafflesia that measures around 10 cm in diameter.

We witnessed the discoveries of some truly beautiful flowers.

Endangered new orchid discovered in Ecuador

Some of them may have looked like they had a demon’s head hiding in them.

Orchid or Demon: Flower of a new species of orchid looks like a devil’s head

We helped unveil some taxonomic mysteries – like the bamboo fossil that wasn’t a bamboo, or the 30-meter new species of tree that was “hiding in plain sight”.

Then there was the overnight celebrity: the first pitcher plant to form underground insect traps.

Underground carnivore: the first species of pitcher plant to dine on subterranean prey

Published less than two months ago, Nepenthes pudica broke all kinds of popularity records at PhytoKeys: it became the journal’s all-time most popular work, with thousands of shares on social media, more than 70 news outlets covering its story, and upward of 70,000 views on YouTube.

Publishing in PhytoKeys is always a pleasure. I appreciate the quick but rigorous peer review process and reasonably short time from initial submission to the final publication.

says Martin Dančák of Palacký University in Olomouc, Czech Republic, lead author of the Nepenthes study.

Every week, PhytoKeys publishes dozens of pages of quality botany research. Every week, we’re amazed at the discoveries made by botanists around the world. In a field that is so rapidly evolving, and with so much remaining to be unveiled, the future sure seems promising!

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Redefining genera across the legume subfamily Caesalpinioideae in latest PhytoKeys issue

The Special Issue features 16 papers by 54 authors from 13 countries and forms Part 14(1) of the Advances in Legume Systematics Series.

Blog post by Colin Hughes, University of Zurich

The three most important taxonomic ranks used to classify organisms are family, genus and species, especially the latter two, which make up the scientific binomials used to communicate about biodiversity, and indeed about all aspects of biology. While the description of a new plant family is now a very rare event, the same is not true for genera. Indeed, delimitation of genera within many plant families remains in a state of considerable flux, because many traditionally recognized genera do not correspond to evolutionary groups. This causes unwelcome instability in scientific names of species and is why work to delimit genera lies at the heart of much current research in systematic botany.

This is very much the case for subfamily Caesalpinioideae, the second largest subfamily of the legume family, which is the focus of this new special issue of the open-access, peer-reviewed journal PhytoKeys. With around 4,600 species of mostly trees, shrubs and lianas, distributed right across the tropics in rainforests, dry forests and savannas, Caesalpinioideae represent a spectacularly diverse lineage of tropical woody plants.

New analyses of DNA sequences of 420 species of Caesalpinioideae presented here reveal that 22 of the 152 currently recognized genera do not coincide with natural evolutionary groups, i.e., in phylogenetic terms, they are non-monophyletic. The aim of this special issue is to re-define as many of these problematic genera as possible in order to bring them into line with natural evolutionary lineages. To achieve this, nine new genera of Caesalpinioideae are described, five previously recognized genera are resurrected, and three genera shown to be nested within other genera are consigned to synonymy.

Many of the species in these new genera are important, conspicuous, ecologically abundant, and, in some cases, geographically widespread trees in tropical forests. For example, the three species of the new genus Osodendron  are important large canopy trees in tropical rain forests and riverine gallery forests across a broad swathe of west and central Africa. In recent decades these species have been successively placed in different genera including Cathormion, Samanea and Albizia, among others. The neglected generic placement of these African trees has finally been resolved via analyses of DNA sequences, and a new generic home for them has been established.

In contrast, two of the genera newly described in this special issue, Mezcala  and Boliviadendron, each with just a single species, are much more elusive plants occupying very narrowly restricted geographical ranges. Mezcala occurs across just a few square km of the central Balsas Depression in south-central Mexico and Boliviadendron is known from just two interior valleys of the Bolivian Andes. Establishing these two lineages as distinct genera highlights the importance of conserving these globally rare evolutionary lineages.

Choosing names for new taxa is one of the delights and privileges of the practising taxonomist. Derivations of the names of the nine new genera described in this special issue span features of the plants themselves and the locations where they grow, as well as names of fellow legume researchers honoured with genera named in recognition of their contributions. For example, Osodendron is named after ‘Oso’ a food that is prepared in West Africa from seeds of one of the species now placed in the new genus. Mezcala is named for the indigenous Mezcala culture of the Balsas region in Mexico where the genus is found. Boliviadendron is named as such because it is a tree that grows in Bolivia and nowhere else. The new genus name Heliodendron is derived from the Greek helios (sun) and dendron (tree) because it grows in the sunshine state of Queensland in Australia and its flowers are arranged in sun-like globose heads.

Leaves and fruits of the new genus Naiadendron from Amazonian rainforest. Photo by Glocimar Pereira-Silva

Finally, Naiadendron celebrates the Brazilian Amazon where the genus grows, and the famous German botanist Carl Friedrich Philipp von Martius (1794–1868), who named the Brazilian Amazon after the Naiads, Greek mythology’s nymphs of freshwater.

Four of the genera newly described in this Special Issue are named after prominent contemporary legume taxonomists, three women and one man: Gretheria for Rosaura Grether, a Mexican specialist on the genus Mimosa, Ricoa  for Lourdes Rico, another Mexican botanist who worked on legumes based at Kew, Marlimorimia, in honour of Marli Pires Morim of the Jardim Botânico do Rio de Janeiro, Brazil in recognition of her contributions to the taxonomy of mimosoid legumes, and Gwilymia named for Gwilym Lewis, in honour of one of the world’s most experienced and productive legume taxonomists who is legume research leader in the Herbarium at the Royal Botanic Gardens, Kew.

The new genus Gwilymia in Brazil. Photos by Marcelo Simon

One of the central achievements of the work on Caesalpinioideae presented in this Special Issue is that for the first time a truly pantropical analysis of this large group of plants has been accomplished. A global synthesis is essential to work out how many genera there are.

For example, by sampling across Asia, Africa, Madagascar, North and South America, it has become clear that the Old World species of the important pantropical genus Albizia are not closely related to Albizia in the Americas, prompting splitting of the genus and resurrection of the name Pseudalbizzia for the New World species. All elements of the former Albizia – the last so-called ‘dustbin’ genus in the mimosoid legumes – are accounted for in this special issue (here, here and here). Similarly, the genus Prosopis, one of the most important silvopastoral tree genera of the dryland tropics, has traditionally encompassed elements spanning the New and Old Worlds that are here shown to comprise four distinct evolutionary lineages, two in the Old World and two in the Americas, here treated as four separate genera.

Changes to the scientific names of species are not always immediately welcomed by users, but over time, establishment of a classification that is based on robust evidence about evolutionary history will result in greater nomenclatural stability and in named taxa that are aligned with natural groups and hence biologically more informative. This special issue, reshaping the generic system of a species-rich group of legumes, is an important step towards that goal.

Photo credits: Globimar Pereira-Silva, Steen Christensen, William Hawthorne, Colin Hughes, Luciano de Queiroz, Marcelo Simon.

Bay Area high school students describe two new species of scorpions with California Academy of Sciences

Identified on the community science platform iNaturalist, the species add to California’s rich biodiversity.

California now has two new scorpions on its list of species, thanks to the efforts of two keen-eyed high school students from the Bay Area and the California Academy of Sciences. Harper Forbes and Prakrit Jain, avid users on the community science platform iNaturalist, discovered the new-to-science scorpions while trawling the thousands of observations uploaded by other users in the state.

New species Paruroctonus soda and Paruroctonus conclusus are playa scorpions, meaning they can only be found around dry lake beds, or playas, from the deserts of Central and Southern California. For scientists, conservation managers, and the growing communities of wildlife observers on platforms like iNaturalist, these newly described species provide a better understanding of California’s biodiversity and the places most in need of protection—a cornerstone of the Academy’s Thriving California initiative.

The budding naturalists collaborated with Curator of Arachnology  Lauren Esposito, PhD, to formally describe the species in a study published today in ZooKeys. 

This female scorpion is one of the newly described species (Paruroctonus soda) and is seen carrying 51 juveniles. (© Prakrit Jain)

In 2019, Forbes and Jain came across an unknown scorpion species on iNaturalist observed near Koehn Lake—an ephemeral lake in the Mojave Desert—that had remained unidentified since it was uploaded six years earlier. 

“We weren’t entirely sure what we were looking at,” Jain says. “Over the next couple years, we studied scorpions in the genus Paruroctonus and learned they frequently evolve to live in alkali playas like Koehn Lake. When we returned to that initial observation, we realized we were looking at an undescribed Paruroctonus species.” 

Harper Forbes (left), Prakrit Jain (right), and Academy Curator of Arachnology Lauren Esposito, PhD, (center) search for scorpions. (Gayle Laird 2022 © California Academy of Sciences)

Serendipitously, another unknown scorpion observed in San Luis Obispo County was uploaded to iNaturalist shortly after their discovery in May of 2021. With a few years of arachnid research under their belts, Forbes and Jain knew right away that it was a new species in the same genus. They immediately contacted Esposito to assist, resulting in two new-to-science scorpions—P. soda and P. conclusus—and a published paper in which Forbes and Jain are first authors. 

“Harper and Prakrit went through all the steps to formally describe a species, sampling the populations and comparing them with existing specimens in our collection,” Esposito says. “There’s a lot of work involved, but they are incredibly passionate about this research. It’s inspiring to see that their hobby is one that advances biodiversity science.”

The new scorpions species were discovered on community science platform iNaturalist. (Gayle Laird 2022 © California Academy of Sciences)

P. soda and P. conclusus are both alkali sink specialists, meaning they have adapted to the alkaline basins—dry, salty playas with high pH soils—in which they evolved. Each species has a very limited range and can only be found in the playas where they were discovered: Soda Lake (the former’s namesake) and Koehn Lake. During their summer break, Forbes and Jain visited the lakes to collect specimens of each new species. After scouting the alkali flats during the daytime for habitats most suited for playa scorpions, they set out with their vials and forceps at dusk, as these desert dwellers are primarily active at night. Luckily, most scorpions fluoresce under ultraviolet light, so the researchers used blacklights to scour the open playas while keeping an eye out for their glowing subjects. They also searched the scorpions’ typical hiding places, peering into cracks in the hard clay soil and combing through common alkali sink plants like iodine bush (Allenrolfea occidentalis) and bush seepweed (Suaeda nigra). At the end of each trip, they successfully collected a sample size of both males and females sufficient for the study.

While the species range for P. soda is small (just a few square miles), it is entirely located within Carrizo Plain National Monument—federally protected land that renders this species safe from human-driven threats. Unfortunately, this is not the case for P. conclusus.

“While no official assessment has been carried out for either species, P. conclusus can only be found on a narrow strip of unprotected land, less than two kilometers long and only a few meters wide in some places,” Forbes says. “The entire species could be wiped out with the construction of a single solar farm, mine, or housing development.” 

Habitat of Paruroctonus conclusus at the type locality, taken in July 2021.

Though P. soda seems to be relatively safe compared to P. conclusus, the constant threat of climate change endangers all wildlife, particularly in delicate desert environments. As part of the Thriving California initiative, Academy scientists hope to collaborate with schools and communities throughout the state to conduct further biodiversity research. By harnessing scientific data—including crowd-sourced data from iNaturalist—and providing access to environmental and science learning, the initiative hopes to halt biodiversity loss in the Golden State. 

Harper and Prakrit will continue their research with the Academy and are currently working on a holistic book of California’s scorpions. (Gayle Laird 2022 © California Academy of Sciences)

Now high school graduates, this fall Forbes will study evolutionary biology at the University of Arizona and Jain will study integrative biology at the University of California, Berkeley. They will continue their work with Esposito and are currently collaborating on their next major project: a holistic book of California’s scorpions. In addition to their research and academic endeavors, they are excited to get back out in the field to find, collect, and identify more scorpions. 

“I will never get tired of going out at night to find a certain scorpion for the first time,” Jain says. “Whether it be solving the mystery of a long-lost scorpion or discovering something new in an unexpected place, a trip to the desert is always a challenge and an adventure.”

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Research article:

Jain P, Forbes H, Esposito LA (2022) Two new alkali-sink specialist species of Paruroctonus Werner 1934 (Scorpiones, Vaejovidae) from central California. ZooKeys 1117: 139-188. https://doi.org/10.3897/zookeys.1117.76872

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This press release was originally published by the California Academy of Sciences.

Celebrating World Lizard day with amazing discoveries

This August 14, we’re looking back to the most impressive lizard discoveries we’ve witnessed throughout the years.

World Lizard Day is a great way to raise awareness of these curious reptiles and their conservation needs; it is also a good excuse to look at pretty lizard pictures! Today, we’re doing a bit of both.

At Pensoft, we’ve published many new lizard species, some of them rare and truly fascinating. This August 14, we’re looking back to the most impressive lizard discoveries we’ve witnessed throughout the years.

The Dracula lizard

This beautiful lizard, described in 2018, comes from the Andean slopes of southwestern Colombia and northwestern Ecuador. It inhabits evergreen low montane forests, and is only known from a relatively small territory of approximately 1582 km2. Its prey most often consists of insects, spiders and worms.

Contrary to what you might think, this species was not named after the eponymous vampire count, but rather after some beautiful tropical flowers.

The specific epithet dracula refers to the Dracula Reserve, which is located within the lizard’s distribution and near its type locality. The Reserve protects an area with a high diversity of orchids of the genus Dracula.

Published in ZooKeys.

The tiny chameleon

This lizard friend, known as Brookesia tedi, is less than 3 cm long! It is more than ten times smaller than the longest known chameleon, Furcifer oustaleti. Its size makes it difficult to find, and as a result, challenging to study. Its description, published in 2019, helped resolve a 50-year old identity question.

Living at 1300 m above sea level on the Marojejy massif in northeastern Madagascar, Brookesia tedi lives is brown in colour, its tail and the back of its head grey.

The researchers consider it Vulnerable but worry that improper protection on Marojejy, as well as fires, could rapidly drive the species to becoming Critically Endangered.

Published in Zoosystematics and Evolution.

The charismatic wood lizard

Enyalioides feiruzae is a colourful and highly variable lizard – especially its males, who can have brownish turquoise, gray, or greenish brown backs traced with pale lines. Females, in turn, can be greenish brown or floury brown, with faint dark brown lines on their back, limbs and tail, and spots on the sides. The team behind its discovery spent seven years in the area searching for amphibians and reptiles before describing it.

The species comes from the Tropical Andes, and more specifically – from the Huallaga River basin, an area which is still poorly studied because for a long time it was disturbed by civil wars.

The Feiruz wood lizard was named after another reptile, Feiruz the iguana – “muse and lifelong friend”.

The spotted monitor lizard

Mussau is a small island in northeastern Papua New Guinea. The top predator on it? A lizard.

Varanus semotus has been isolated from related species for an estimated one to two million years, with its closest relatives several hundred kilometers away.

Even so, science discovered it only recently.

The one-meter-long lizard has a black body with yellow and orange markings and a pale yellow tongue, with a turquoise to blue tail. These animals “will eat just about anything they can catch and kill,” study author Valter Weijola told the Washington Post.

As the only large terrestrial generalist predator and scavenger on the island, Varanus semotus may fill an important ecological function, making it of particular conservation concern.

Published in ZooKeys.

The black iguana

What makes Iguana melanoderma so distinct is its black color; in fact, it only gets blacker with age. The species was discovered in Saba and Montserrat islands, the Lesser Antilles (Eastern Caribbean), to which it is endemic.

However, it is threatened by unsustainable harvesting (including pet trade), and competition and hybridization from invasive alien iguanas from South and Central America.

A greater focus on biosecurity, the minimization of hunting, and habitat conservation, would help its conservation, the researchers write in their paper.

In Saba, Iguana melanoderma lives on cliffs, in trees and bushes, in shrublands, and deciduous woodlands. It lives in a foggy and cool environment up to about 500 m a.s.l. and sunbathes as soon as the sun rises.

Published in ZooKeys.

Bonus: Illegal lizard trade might be closer than you think

Dubbed “miniature Godzilla” and “the Holy Grail of Herpetology,” the earless monitor lizard is endemic to Borneo. Legally, it can neither be traded within Indonesia, Malaysia and Brunei, nor exported out of them.

Even so, reptile enthusiasts and unscrupulous traders have long been smuggling small numbers of earless monitor lizards, eventually bringing them to Europe.

A new study reported that accredited zoos have acquired individuals of the protected lizard, without any evidence of legal export.

“Zoos that continue to obtain animals that have been illegally acquired, directly or indirectly, are often fuelling the illegal wildlife trade, supporting organised crime networks and possibly contributing to the decline in some species,” Vincent Nijman, author of the study, told us.

Published in Nature Conservation.