Guest blog post by John Midgley and Burgert Muller
Despite centuries of study, our knowledge of the natural world is still woefully inadequate. This is especially true for inaccessible regions, but these regions often hold interesting species of communities to study. The best studied country in the Afrotropics is South Africa, but nearby countries have received much less attention.
Malaise trap over a stream at Sehlabathebe National Park.
The Kingdom of Lesotho is nestled within the borders of South Africa and this landlocked country shares many ecological similarities with its neighbour. However, Lesotho has an average altitude that is 900 m higher, leading to differences in its fauna and flora, especially in its alpine areas, as these are much more extensive than in South Africa.
View south-east from Moteng Pass in northern Lesotho.
While the insects of South Africa are well studied, in particular the True flies (Diptera), Lesotho remains largely undersampled for flies, and that in combination with its unique habitat has created an opportunity to contribute to the country’s biodiversity knowledge.
Malaise trap at Roma Trading post lodge. Even though the area is a modified garden site, Lesotho lacks basic biodiversity data and species were collected for the first time from Lesotho.
With discovery on their minds, Dipterists from four institutions (KwaZulu-Natal Museum, National Museum, Albany Museum and Royal Museum for Central Africa) planned to undertake several fieldtrips to Lesotho. The aim was not to just increase the holdings of the institutions, as this would be short-sighted. Instead, the goal was to promote conservation and to improve on the current knowledge on the Diptera of Lesotho. The rest is natural history, and the special collection on the Diptera of Lesotho in African Invertebrateswas born.
Pristine grassland at Sehlabathebe National Park. Large parts of Lesotho are modified by agriculture, but in remote areas pristine sites remain.
Even areas that have received little attention are not complete blank slates, and a handful of expeditions to Lesotho were undertaken in the mid-20th Century, most notably by the Lund Zoological Institute, The KwaZulu-Natal Museum, The Durban Natural Science Museum and the Albany Museum, but large targeted and purposeful collections are not common. The specimens from these expeditions are housed at various international and local South African institutions, which do have some limited collections of Lesotho material.
Letšeng la Letsie is the largest alpine lake in Lesotho, but despite being a protected area is heavily influenced by grazing.
We added three further expeditions to this, in December 2021, November 2022 and January 2023, adding over 7000 specimens to the National Museum, Bloemfontein and KwaZulu-Natal Museum collections. The details of these specimens can be found in our recently published introduction to the Special Collection along with photographs of the collection sites from our expeditions.
Today, 16 September 2023, we are celebrating our tenth anniversary: an important milestone that has prompted us to reflect on the incredible journey thatBiodiversity Data Journal (BDJ) has been through.
From the very beginning, our mission was clear: to revolutionise the way biodiversity data is shared, accessed, and harnessed. This journey has been one of innovation, collaboration, and a relentless commitment to making biodiversity data FAIR – Findable, Accessible, Interoperable, and Reusable.
Over the past 10 years, BDJ, under the auspices of our esteemed publisher Pensoft, has emerged as a trailblazing force in biodiversity science. Our open-access platform has empowered researchers from around the world to publish comprehensive papers that seamlessly blend text with morphological descriptions, occurrences, data tables, and more. This holistic approach has enriched the depth of research articles and contributed to the creation of an interconnected web of biodiversity information.
In addition, by utilising ARPHA Writing Tool and ARPHA Platform as our entirely online manuscript authoring and submission interface, we have simplified the integration of structured data and narrative, reinforcing our commitment to simplifying the research process.
One of our most significant achievements is democratising access to biodiversity data. By dismantling access barriers, we have catalysed the emergence of novel research directions, equipping scientists with the tools to combat critical global challenges such as biodiversity loss, habitat degradation, and climate fluctuations.
We firmly believe that data should be openly accessible to all, fostering collaboration and accelerating scientific discovery. By upholding the FAIR principles, we ensure that the datasets accompanying our articles are not only discoverable and accessible, but also easy to integrate and reusable across diverse fields.
As we reflect on the past decade, we are invigorated by the boundless prospects on the horizon. We will continue working on to steer the global research community towards a future where biodiversity data is open, accessible, and harnessed to tackle global challenges.
Ten years of biodiversity research
To celebrate our anniversary, we have curated some of our most interesting and memorable BDJ studies from the past decade.
Recently, news outlets were quick to cover a new species of ‘snug’ published in our journal.
“Life Beneath the Ice”, a short musical film about light and life beneath the Antarctic sea-ice by Dr. Emiliano Cimoli
We extend our heartfelt gratitude to our authors, reviewers, readers, and the entire biodiversity science community for being integral parts of this transformative journey. Together, we have redefined scientific communication, and we will continue to push the boundaries of knowledge.
Microplastics forming the disproportionate amount of plastic garbage, and catfish have become numerically dominant in some ecosystems thanks to their tolerance to pollution and anoxic environments.
Armored catfish (Pterygoplicthys spp.) and microplastics, as invasive species and emerging contaminants, respectively, represent two socio-environmental problems in the globalized world, since both have negative effects on faunistic communities and freshwater habitats, as well as on rural community fisheries and public health.
Non-native invasive species of armored catfish have become numerically dominant in some ecosystems, with efforts to eradicate them a seemingly endless task. Due to this, a possible scenario of biological homogenization in Mesoamerica can be expected, mainly given by the wide dispersion of the Pterygoplichthys species, added to the introduction of other non-native catfish species.
Photo: Miguel Ángel Salcedo. Drawing: Diana Ríos-Hernández.
The omnipresence of plastics in terrestrial and aquatic environments is caused by their excessive use and inadequate management of waste. The discarded plastics are fragmented, degraded, and dissolved by solar radiation, wind, and water, among other agents, to be incorporated into the food web in aquatic environments.
Microplastics found in the digestive tract of armed catfish (Pterygoplichthys spp.)
Both persist in the aquatic environment, microplastics forming the disproportionate amount of plastic garbage, and catfish thanks to their tolerance to pollution and anoxic environments, and their ability to survive for several hours breeding atmospheric oxygen. What is the relationship between the two? Microplastics, depending on their origin and composition, are sedimented in the wetlands, where they can be ingested by detritus feeders, such as armored catfish, mainly in areas where there is runoff or discharge of liquid waste.
In this context, we ask ourselves, can armored catfish be used as biomonitors of microplastics deposited in wetlands? Taking the above into consideration, the doctoral student Gabriela Angulo-Olmos under the guidance of the researchers Nicolás Álvarez-Pliego, Alberto J. Sánchez, Rosa Florido, Miguel Ángel Salcedo, Allan K. Cruz-Ramírez and Arturo Garrido Mora from the Laboratorio de Humedales, from the División Académica de Ciencias Biológicas, Universidad Juárez Autónoma de Tabasco, decided to answer the aforementioned question based on the numerical dominance of armored catfish recorded in the aquatic ecosystems of the Metropolitan Area of Villahermosa (MAV) in the coastal plain of the Gulf of Mexico.
A) Study area; Metropolitan Area of Villahermosa. Map modified from INEGI (2021). B) La Pólvora lake (Satélite Airbus 2023).
The stomach contents of the specimens from a lake located in the MAV were reviewed and the results showed that all the specimens had consumed microfibers. This result corroborated that these organisms can ingest sedimented microplastics due to their benthophagous habits.
The use of armored catfish as a resource in the food industry has had positive results, but is still insufficient. Therefore, we propose that another option to control their populations is to subtract and use this organism to verify which are the most frequent and abundant emerging contaminants deposited in the bottoms of urban wetlands.
Research article:
Angulo-Olmos G, Alvarez-Pliego N, Sánchez AJ, Florido R, Salcedo MÁ, Garrido-Mora A, Cruz-Rámirez AK (2023) Microfibers in the gut of invasive armored catfish (Pterygoplichthys spp.) (Actinopterygii: Siluriformes: Loricariidae) in an urban lake in the floodplain of the Grijalva River basin, Mexico. Acta Ichthyologica et Piscatoria 53: 81–88. https://doi.org/10.3897/aiep.53.102643
Guest blog post by Cássio Cardoso Pereira, Daniel Negreiros, and Geraldo Wilson Fernandes
A recently published study by Pereira et al. in the prestigious journal Nature Conservation says that the solution for climate warming and environmental crises is not solely about curbing temperature by planting trees or even by changing our energy matrix. It is about changing our perspective on ourselves and the way we do things. There is a long list of things we have to do if we want to be successful. One important thing is changing policy actions.
This is a reflection of increased public attention to climate change at the expense of other biodiversity issues and may have contributed to a much higher number of UNFCCC Conferences of the Parties (COPs) linked to climate change (27 COPs) compared to those about biodiversity (15 COPs) to this date. Governments should not solely focus on curbing greenhouse gas emissions into the atmosphere. This asymmetry between environmental agendas can harm not only biodiversity, but also climate change, as environmental issues are inexorably interconnected.
Web search interest for environmental topics around the world from 2004 to the present according to Google TrendsTM. Comparison of intergovernmental bodies (A), conventions (B) and terms (C) related to climate (blue) and biodiversity (red). Values represent the percentage of maximum (peak popularity). IPCC: Intergovernmental Panel on Climate Change; IPBES: Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services; UNFCCC: United Nations Framework Convention on Climate Change.
In a society with broad and deep environmental problems, government, private sector and non-governmental efforts should include other dimensions of nature in their agenda. Biodiversity, the unique variety of life on our planet, underpins our cultural, economic, and social well-being. The destruction of ecosystems undermines nature’s ability to regulate greenhouse gas emissions and protect us against extreme weather, thus accelerating climate change and increasing our vulnerability to it. Therefore, it is puzzling that policy-makers are still over-focused on the climate component.
We argue here that the climate change issue is important and urgent. However, this problem cannot be solved without considering the picture as a whole. In this way, changes in land use must be integrated into climate models so that we can achieve a more detailed representation that increases our ability to predict how local impacts of change in land use will affect the future of biodiversity at a global level.
We emphasise that this path is necessary, but it is still winding. There is much to pass on to society in terms of ecological awareness. The spotlight is on climate change, at least in part, because everyone already knows how to get involved in climate action in an accessible way. However, the degradation of biodiversity can be difficult to notice, especially for someone who does not get out and experience nature regularly. Therefore, a big question is how much we still have to learn about the various ecosystems across the planet, their delicate balance and interaction with their wider environment, and indeed the climate.
Reference:
Pereira CC, Negreiros D, Barbosa M, Goulart FF, Dias RL, Melillo MC, Camarota F, Pimenta MA, Cruz M, Fernandes GW (2023) Has climate change hijacked the environmental agenda? Nature Conservation 53: 157-164. https://doi.org/10.3897/natureconservation.53.110961
A new species of spiny mouse has been discovered in Ecuador, making it the 14th of its genus to be identified in the past five years. Neacomys marci, which was previously confused with another species, is around the length of a tennis ball, with a long tail, pale suede belly fur and a white throat.
Live specimen of new species Neacomys marci in its natural habitat. Photo by: Jorge Brito
Discovered in the Chocó biogeographic region in northwestern Ecuador, it is the 24th formally recognised species in its genus, which has seen significant upheaval in recent years.
Neacomys is a widely distributed genus of small spiny or bristly rodents that occupy habitats in eastern Panama and the northern half of South America. Since 2017, studies of the genus have been remarkably dynamic, resulting in the description of several new species.
Live specimen of new species Neacomys marci in its natural habitat. Photo by: Jorge Brito
However, as there are still many unexplored areas in South America and adjacent Central America (Panama), some of the currently recognised species have not been studied thoroughly, and the true diversity of the genus may be underestimated.
The Chocó biogeographic region is considered one of the most diverse biodiversity hotspots in South America, but one of the least studied despite its great size (along the Pacific coasts of Panama, Colombia and Ecuador). The rainforests of northwestern Ecuador have high biodiversity and endemism due to the influence of the Chocó and the Andes Mountains.
Habitat where specimens of Neacomys marci were collected in the study. Photo by: Jorge Brito
Major reviews of museum collections and increased field collection efforts have helped scientists understand Neacomys marci and other species. Molecular analysis is also being used to assist with more accurate animal group identification.
The new species was named after Marc Hoogeslag of Amsterdam, the Netherlands, who was co-founder and leader of the International Union for Conservation of Nature – Netherlands Land Acquisition Fund, which helps local groups around the world establish new ecological reserves and conserve endangered species. The EcoMinga Foundation‘s Manduriacu Reserve, home to this new species, is one of many reserves that have benefited from Hoogeslag’s program.
Original Source:
Tinoco N, Koch C, Colmenares-Pinzón JE, Castellanos FX, Brito J (2023) New species of the Spiny Mouse genus Neacomys (Cricetidae, Sigmodontinae) from northwestern Ecuador. ZooKeys 1175: 187-221. https://doi.org/10.3897/zookeys.1175.106113
Novel nanopublication workflows and templates for associations between organisms, taxa and their environment are the latest outcome of the collaboration between Knowledge Pixels and Pensoft.
Nanopublications complement human-created narratives of scientific knowledge with elementary, machine-actionable, simple and straightforward scientific statements that prompt sharing, finding, accessibility, citability and interoperability.
By making it easier to trace individual findings back to their origin and/or follow-up updates, nanopublications also help to better understand the provenance of scientific data.
With the nanopublication format and workflow, authors make sure that key scientific statements – the ones underpinning their research work – are efficiently communicated in both human-readable and machine-actionable mannerin line with FAIR principles. Thus, their contributions to science are better prepared for a reality driven by AI technology.
The machine-actionability of nanopublications is a standard due to each assertion comprising a subject, an object and a predicate (type of relation between the subject and the object), complemented by provenance, authorship and publication information. A unique feature here is that each of the elements is linked to an online resource, such as a controlled vocabulary, ontology or standards.
Now, what’s new?
As a result of the partnership between high-tech startup Knowledge Pixels and open-access scholarly publisher and technology provider Pensoft, authors in Biodiversity Data Journal (BDJ) can make use of three types of nanopublications:
Nanopublications associated with a manuscript submitted to BDJ. This workflow lets authors add a Nanopublications section within their manuscript while preparing their submission in the ARPHA Writing Tool (AWT). Basically, authors ‘highlight’ and ‘export’ key points from their papers as nanopublications to further ensure the FAIRness of the most important findings from their publications.
Standalone nanopublication related to any scientific publication, regardless of its author or source. This can be done via the Nanopublications page accessible from the BDJ website. The main advantage of standalone nanopublication is that straightforward scientific statements become available and FAIR early on, and remain ready to be added to a future scholarly paper.
Nanopublications as annotations to existing scientific publications. This feature is available from several journals published on the ARPHA Platform, including BDJ. By attaching an annotation to the entire paper (via the Nanopublication tab) or a text selection (by first adding an inline comment, then exporting it as a nanopublication), a reader can evaluate and record an opinion about any article using a simple template based on the Citation Typing Ontology (CiTO).
Nanopublications for biodiversity data?
At Biodiversity Data Journal (BDJ), authors can now incorporate nanopublications within their manuscripts to future-proofthe most important assertions on biological taxa and organisms or statements about associations of taxa or organisms and their environments.
On top of being shared and archived by means of a traditional research publication in an open-access peer-reviewed journal, scientific statements using the nanopublication format will also remain ‘at the fingertips’ of automated tools that may be the next to come looking for this information, while mining the Web.
Using the nanopublication workflows and templates available at BDJ, biodiversity researchers can share assertions, such as:
So far, the available biodiversity nanopublication templates cover a range of associations, including those between taxa and individual organisms, as well as between those and their environments and nucleotide sequences.
Nanopublication template customised for biodiversity research publications available from Nanodash.
As a result, those easy-to-digest ‘pixels of knowledge’ can capture and disseminate information about single observations, as well as higher taxonomic ranks.
The novel domain-specific publication format was launched as part of thecollaboration betweenKnowledge Pixels – an innovative startup tech company aiming to revolutionise scientific publishing and knowledge sharing and the open-access scholarly publisherPensoft.
Basically, a nanopublication – unlike a research article – is a tiny snippet of a precise and structured scientific finding (e.g. medication X treats disease Y), which exists as a reusable and cite-able pieces of a growing knowledge graph stored on a decentralised server network in a format that it is readable for humans, but also “understandable” and actionable for computers and their algorithms.
These semantic statements expressed in community-agreed terms, openly available through links to controlled vocabularies, ontologies and standards, are not only freely accessible to everyone in both human-readable and machine-actionable formats, but also easy-to-digest for computer algorithms and AI-powered assistants.
In short, nanopublications allow us to browse and aggregate such findings as part of a complex scientific knowledge graph. Therefore, nanopublications bring us one step closer to the next revolution in scientific publishing, which started with the emergence and increasing adoption of knowledge graphs.
“As pioneers in the semantic open access scientific publishing field for over a decade now, we at Pensoft are deeply engaged with making research work actually available at anyone’s fingertips. What once started as breaking down paywalls to research articles and adding the right hyperlinks in the right places, is time to be built upon,”
By letting computer algorithms access published research findings in a structured format, nanopublications allow for the knowledge snippets that they are intended to communicate to be fully understandable and actionable. With nanopublications, each of those fragmentsof scientific information is interconnected and traceable back to its author(s) and scientific evidence.
A nanopublication is a tiny snippet of a precise and structured scientific finding (e.g. medication X treats disease Y), which exists within a growing knowledge graph stored on a decentralised server network in a format that it is readable for humans, but also “understandable” and actionable for computers and their algorithms. Illustration by Knowledge Pixels.
By building on shared knowledge representation models, these data become Interoperable (as in the Iin FAIR), so that they can be delivered to the right user, at the right time, in the right place , ready to be reused (as per the R in FAIR) in new contexts.
Another issue nanopublications are designed to address is research scrutiny. Today, scientific publications are produced at an unprecedented rate that is unlikely to cease in the years to come, as scholarship embraces the dissemination of early research outputs, including preprints, accepted manuscripts and non-conventional papers.
A network of interlinked nanopublications could also provide a valuable forum for scientists to test, compare, complement and build on each other’s results and approaches to a common scientific problem, while retaining the record of their cooperation each step along the way.
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We encourage you to try the nanopublications workflow yourself when submitting your next biodiversity paper to Biodiversity Data Journal.
Community feedback on this pilot project and suggestions for additional biodiversity-related nanopublication templates are very welcome!
On the journal website: https://bdj.pensoft.net/, you can find more about the unique features and workflows provided by the Biodiversity Data Journal (BDJ), including innovative research paper formats (e.g. Data Paper, OMICS Data Paper, Software Description, R Package, Species Conservation Profiles, Alien Species Profile), expert-provided data audit for each data paper submission, automated data export and more.
Don’t forget to also sign up for the BDJ newsletter via the Email alert form on the journal’s homepage and follow it on Twitter and Facebook.
Earlier this year, Knowledge Pixels and Pensoft presented several routes for readers and researchers to contribute to research outputs – either produced by themselves or by others – through nanopublications generated through and visualised in Pensoft’s cross-disciplinary Research Ideas and Outcomes (RIO) journal, which uses the same nanopublication workflows.
Venomiustomhardyi pictured next to an illustration of Tom Hardy’s Venom character. Photo by Rossi et al. Illustration by Zeeshano0 via Pixabay.
Tom Hardy and his Marvel character Venom have given their names to a newly discovered Australian spider. The genus Venomius and its only current species Venomius tomhardyi were described following an expedition to Tasmania.
Tom Hardy portrays Eddie Brock and his alter-ego Venom, an antihero closely associated with Spider-Man, across two Marvel films and gives his name to the sole species of the new genus. The distinctive black spots on the arachnid’s abdomen reminded the scientists of Venom’s head, inspiring them to select the unusual name.
Venomiustomhardyi male holotype. Scale bars: 2 mm (A, B); 0.2 mm (C–E). Photos by Rossi et al.
The genus belongs to the Araneidae family of spiders, or Araneae, that build upright circular webs to capture prey. Despite resembling the related genus Phonognatha as both do not have tubercles on the abdomen, the newly described spiders are distinct in their behaviour of creating silk-lined holes in the branches of trees for shelter, as well as their different genitalia.
The holotype of the new species was discovered and subsequently preserved at the Queen Victoria Museum and Art Gallery following an expedition to Tasmania, Victoria, South Australia and Western Australia.
“This is part of a long-term research that aims to document the entire Australian spider fauna, which will be of extreme importance for conservation management plans and the continuation of the decadal plan for taxonomy and biosystematics in Australia and New Zealand.”
Dr. Pedro Castanheira, contributing author.
Distribution records of Venomius tomhardyi. Image by Rossi et al.
Researchers also sourced supplementary specimens from scientific arachnology collections, with researchers examining approximately 12,000 records in Australian and overseas institutions.
“It is really important to keep describing new spiders to assess the total biodiversity of these predators in Australia,” added the study’s first author MSc Giullia Rossi.
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Original source:
Rossi GF, Castanheira PS, Baptista RLC, Framenau VW (2023) Venomius, a new monotypic genus of Australian orb-weaving spiders (Araneae, Araneidae). Evolutionary Systematics 7(2): 285-292. https://doi.org/10.3897/evolsyst.7.110022
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Researchers recommend IUCN CPSG’s One Plan Approach to Conservation measures, which include both habitat conservation and increasing the number of threatened species in breeding stations and zoos.
Endangered psychedelic rock gecko (Cnemaspis psychedelica) Photo by Thomas Ziegler. Licence: CC-BY.
Further conservation measures are required to protect Vietnamese reptiles, such as the psychedelic rock gecko (Cnemaspis psychedelica), from habitat loss and overharvesting, concludes a new report, published in the open-access scientific journalNature Conservation.
Having identified areas of high reptile diversity and large numbers of endangered species, the study provides a list of the 50 most threatened species as a guide for further research and conservation action in Vietnam.
The study, based on the bachelor thesis of Lilli Stenger (University of Cologne, Germany), recommends IUCN CPSG’s One Plan Approach to Conservation measures, which, next to improved habitat conservation, also involves increasing the number of threatened species in breeding stations and zoos to maintain populations suitable for restocking.
“Modern zoos, as well as local facilities, can play a crucial role in not only conducting or financially supporting in situ conservation projects, that is to say in nature, but also by protecting species from extinction through maintaining ex situ assurance colonies to reinforce in situ conservation programs,”
said Prof. Dr. Thomas Ziegler, Vietnam conservation team member and coordinator from Cologne Zoo, Germany.
Endangered Truong Son pit viper or Quang Binh pit viper (Trimeresurus truongsonensis). Photo by Thomas Ziegler. Licence: CC-BY.
The scientists identified 484 reptile species known to Vietnam, aiming to provide a baseline to authorities, conservationists, rescue centers, and zoos, so they can follow up with appropriate conservation measures for endangered species. They note that the number is likely to go up, as the country is regarded as a top biodiversity hotspot, and the rate of new reptile species discoveries remains high.
According to the IUCN Red List, 74 of the identified species are considered threatened with extinction, including 34 endemic species. For more than half of Vietnam’s endemic reptiles (85 of 159), the IUCN Red List status is either missing or outdated, and further research is imperative for these species, the researchers say.
Vietnam has a high level of reptile diversity and an outstanding number of endemic species. The species richness maps in the study revealed the Central Annamites in central Vietnam to harbor the highest endemic species diversity (32 species), which highlights it as a site of particular importance for reptile conservation. Alarmingly, a protected area analysis showed that 53 of the 159 endemic species (33.2%) including 17 threatened species, have been recorded exclusively from unprotected areas, such as the Psychedelic Rock Gecko.
The Critically Endangered Annam pond turtle (Mauremys annamensis) is one of the most endangered turtle species in Vietnam and in the world. It is not known from any protected area. Despite likely being extinct in the wild, ex situ conservation programs have been implemented in time with a high number of individuals being kept and bred in zoos and stations and now ready for restocking actions. Photo by Thomas Ziegler. Licence: CC-BY.
In General, Vietnam is considered a country with high conservation priority due to habitat loss and overharvesting for trade, traditional medicine and food.
Globally, reptiles are considered a group of special conservation concern, as they play an important role in almost all ecosystems and often have relatively small distribution ranges, making them especially vulnerable to human threats.
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Original source:
Stenger L, Große Hovest A, Nguyen TQ, Pham CT, Rauhaus A, Le MD, Rödder D, Ziegler T (2023) Assessment of the threat status of reptile species from Vietnam – Implementation of the One Plan Approach to Conservation. Nature Conservation 53: 183 221. https://doi.org/10.3897/natureconservation.53.106923
Despite being widespread and abundant, these gregarious herbivores vanished in Western Europe around 69 million years ago due to environmental changes, while surviving longer in Eastern Europe.
When you think of dinosaurs, you might automatically imagine iconic dinosaurs as Tyrannosaurus and Triceratops. But at the same time when these were stomping on the ancient coastal plains of North America, some of their very distant cousins were reigning over Europe’s lands.
Life reconstructions and size comparison of three rhabdodontids. From left to right: Mochlodon suessi from eastern Austria (the smallest member of the group), Rhabdodon priscus from southern France (the largest member of the group), and Transylvanosaurus platycephalus from western Romania (the most recently named member of the group). Also shown is the silhoutte of a human (1.8 m tall) for scale. Reconstruction by Peter Nickolaus
During the Late Cretaceous (between 100 and 66 million years ago), Europe was an extensive archipelago with numerous small and large islands situated in a shallow tropical sea, the so-called Late Cretaceous European Archipelago. The dinosaur groups that lived on these islands were very different from those of other continents, often being much smaller than their mainland relatives. These European dinosaurs include small and medium-sized carnivorous theropods, armoured ankylosaurs, long-necked sauropods, duck-billed hadrosaurs, and rhabdodontids.
Skeletal reconstruction of Zalmoxes robustus. Scale bar: 20 cm
Arguably one of the most important of these European dinosaur groups is the family Rhabdodontidae, which groups together the most common medium-sized herbivores of the Late Cretaceous European Archipelago. A joint research team from the Universities of Tübingen (Germany), Budapest (Hungary) and Bucharest (Romania) recently reviewed what we know about these peculiar dinosaurs in a new paper published in the journal Fossil Record.
Generally, rhabdodontid dinosaurs were small to medium-sized animals with an overall body length of approximately 2–6 m. “They were probably habitually bipedal herbivores, characterised by a rather stocky build, with strong hind limbs, short forelimbs, a long tail, and a comparatively large, triangular skull that tapers anteriorly and ends in a narrow snout,” explains Felix Augustin, lead author of the study in Fossil Record.
“They had a relatively robust skull with strong jaws, large teeth and a pointy beak that was covered in keratin, demonstrating that these dinosaurs were well-adapted to eating tough plants.”
In some instances, fossil remains of several individuals of different ages have been found together, indicating that they were gregarious.
Although they died out well before the mass extinction in Western Europe (about 69 million years ago), potentially due to environmental changes that affected the plants they fed on, they survived much longer in Eastern Europe and were among the last non-avian dinosaurs still present before the end of the Cretaceous (66 million years ago).
Interestingly, fossils of rhabdodontids have only been found in Europe and only in rocks ranging in age from 86–66 million years ago, so they were endemic to the Late Cretaceous European Archipelago.
The group currently comprises nine different species from five European countries (France, Spain, Austria, Hungary, and Romania).
Palaeogeographic map of Europe during the latest Cretaceous (late Campanian), with the location of the most important rhabdodontid-bearing assemblages. 1 Transylvania, western Romania. 2 Iharkút, western Hungary. 3 Muthmannsdorf, eastern Austria. 4 Eastern southern France. 5 Western southern France. 6 Northern Spain. 7 Central Spain.
“The first rhabdodontid species was scientifically named more than 150 years ago and the last one as recently as November 2022, so, although the group looks back to a long research history, we still have much to learn about it,” says Felix Augustin.
“Generally, our portraying of the world of dinosaurs is heavily biased towards the well-known North-American and Asian dinosaur faunas,” he adds.
Type specimens of some rhabdodontid species. A. The original drawing of the lectotype of Rhabdodon priscus, MPLM 30, a partial left dentary. The specimen has since deteriorated (Pincemaille-Quillevere 2002). Modified after Matheron (1869). B. Holotype of Rhabdodon septimanicus, MDE D-30, an incomplete right dentary. Photo kindly provided by Eric Buffetaut. C. Lectotype of Mochlodon suessi, PIUW 2349/2, a right dentary. D. Holotype of Mochlodon vorosi, MTM V 2010.105.1, a left dentary. E. Holotype of Zalmoxes robustus, NHMUK R.3392, a right dentary. Photo kindly provided by János Magyar. F. Holotype right dentary of Zalmoxes shqiperorum, NHMUK R.4900. Note that the holotype of Z. shqiperorum also comprises several postcranial elements that presumably belong to the same individual as the dentary. Photo kindly provided by János Magyar.
Dinosaur fossils from the Late Cretaceous are much rarer in Europe than in North America or Asia, and thus far no complete skeleton of a rhabdodontid has been described. Even though they were so abundant and common in the Upper Cretaceous of Europe, several key aspects about them remain poorly known, including their detailed body proportions, their posture and locomotion, as well as their feeding behaviour.
“In the past decades, a wealth of new, and often well-preserved, rhabdodontid fossils has been discovered throughout Europe, the majority of which still remains to be studied,” says Felix Augustin. “A joint research project is currently underway to study the available fossil material in order to gain new insights into the evolution and lifestyle of these fascinating yet still poorly known dinosaurs.”
Original source:
Augustin FJ, Ősi A, Csiki-Sava Z (2023) The Rhabdodontidae (Dinosauria, Ornithischia), an enigmatic dinosaur group endemic to the Late Cretaceous European Archipelago. Fossil Record 26(2): 171-189. https://doi.org/10.3897/fr.26.108967
An international research team including the University of Göttingen has described seven previously unknown species of leaf insects, also known as walking leaves. The insects belong to the stick and leaf insect order, which are known for their unusual appearance: they look confusingly similar to parts of plants such as twigs, bark or – in the case of leaf insects – leaves.
An adult female of Pulchriphyllium anangu, one of the newly described species, observed July 2016 at Kadumane Estate, India by iNaturalist user @ashwinv (Ashwin Viswanathan) https://www.inaturalist.org/observations/29374627)
This sophisticated camouflage provides excellent protection from predators as well as presenting a challenge to researchers. Genetic analysis enabled the researchers to discover “cryptic species”, which cannot be distinguished by their external appearance alone. The findings are not only important for the systematic study of leaf insects, but also for the protection of their diversity. The results were published in the scientific journal ZooKeys.
Taxonomy – meaning the naming, description and classification of species – is difficult in the case of leaf insects: individuals of different species can be difficult to tell apart, yet there can be huge variations within a species. “Individuals of different species are often counted as belonging to the same species based on their appearance. We were only able to identify some of the new species by their genetic characteristics,” explains the Project Lead, Dr Sarah Bank-Aubin, Göttingen University’s Animal Evolution and Biodiversity Department.
An adult female of Pulchriphyllium crurifolium, observed September 2019 at Sans Souci, Mahé, Seychelles, by Juan Jose Areso uploaded by iNaturalist user @liahg (Amalia Herrera Grau) (https://www.inaturalist.org/observations/76082181)
Some individual insects from India were previously thought to belong to a species that is widespread in Southeast Asia. But now the researchers have found out that they are a completely new species of leaf insects. Bank-Aubin emphasises: “The finding is important for species conservation: if all the individuals die out in India, it is not just a group within a species that is reduced, as was previously thought. In fact, a whole distinct species is being wiped out. This means that the Indian species is particularly important to protect.” Other newly discovered species come from Vietnam, Borneo, Java and the Philippines.
Three of the newly discovered leaf insect species. Left to right: A female of Phyllium ortizi, an adult male of Pulchriphyllium anangu observed November 2019 in Pakkalakunja, Karnataka, India by iNaturalist user @sanath_ramesh_manimoole (Sanath R M) (https://www.inaturalist.org/observations/103401996), and a female of Pulchriphyllium bhaskarai.
The researchers from Göttingen University worked with leaf insect expert Royce Cumming, City University New York. This research collaboration has led to the identification of over twenty new species. Dr Sven Bradler, who has been researching the evolution of stick and leaf insects at the University of Göttingen for more than 20 years, explains: “There are around 3,500 known species of stick and leaf insects and there are currently just over 100 described species of leaf insect. Although they only make up a small fraction of this diverse family of insects, their spectacular and unexpected appearance makes them unique.”
Research article:
Cumming RT, Le Tirant S, Linde JB, Solan ME, Foley EM, Eulin NEC, Lavado R, Whiting MF, Bradler S, Bank S (2023) On seven undescribed leaf insect species revealed within the recent “Tree of Leaves” (Phasmatodea, Phylliidae). ZooKeys 1173: 145-229. https://doi.org/10.3897/zookeys.1173.104413
