Tag: fauna

In a hole in a tunicate there lived a hobbit: New shrimp species named after Bilbo Baggins

Two new species of tiny symbiotic shrimps are described, illustrated and named by biology student at Leiden University Werner de Gier as part of his bachelor’s research project, supervised by Dr. Charles H. J. M. Fransen, shrimp researcher of Naturalis Biodiversity Center (Leiden, the Netherlands).

Inspired by the extremely hairy feet of one of the species, the authors decided that they should honour Middle Earth’s greatest halfling, Bilbo Baggins.

Aptly named Odontonia bagginsi, the new shrimp joins the lines of other species named after Tolkien’s characters such as the cave-dwelling harvestman Iandumoema smeagol, the golden lizard Liolaemus smaug and the two subterranean spiders Ochyrocera laracna and Ochyrocera ungoliant.

The newly described shrimps were collected during the Ternate expedition to the Indonesian islands of Tidore and Ternate, organised by Naturalis Biodiversity Center and the Indonesian Institute of Sciences (LIPI) in 2009.

Typically for the Odontonia species, the new shrimps do not reach sizes above a centimetre in length, and were found inside tunicates. It is believed that these symbiotic crustaceans are fully adapted to live inside the cavities of their hosts, which explains their small-sized and smooth bodies.

Unlike most Odontonia species, which live inside solitary tunicates, the new species Odontonia plurellicola was the first one to be associated with a colonial tunicate. These tunicates have even smaller internal cavities, which explains the tiny size of the new species.

To determine the placement of the new species in the tree of life, the scientists compared the shrimps’ anatomical features, including the legs, mouthparts and carapace. As a result, they were assigned to Odontonia. Further, the available genetic information and Scanning Electron Microscope (SEM) images of the unusual feet of the newly discovered shrimp provided a new updated identification key for all members of the species group.

“Being able to describe, draw and even name two new species in my bachelor years was a huge honour. Hopefully, we can show the world that there are many new species just waiting to be discovered, if you simply look close enough!” says Werner de Gier, who is currently writing his graduate thesis at Naturalis Biodiversity Center and working together with Dr. Charles Fransen on crustaceans.

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Original source:

de Gier W, Fransen CHJM (2018) Odontonia plurellicola sp. n. and Odontonia bagginsi sp. n., two new ascidian-associated shrimp from Ternate and Tidore, Indonesia, with a phylogenetic reconstruction of the genus (Crustacea, Decapoda, Palaemonidae). ZooKeys 765: 123-160. https://doi.org/10.3897/zookeys.765.25277

What is a species? British bird expert develops a math formula to solve the problem

Two different kinds of Lachrymose Mountain-Tanager (*Anisognathus lacrymosus*) occurring in Colombia on different mountain ranges (left: Santa Marta; right: Yariguies). Their measurements and songs were as distinct as those in the group which co-occur. Therefore, they can therefore be treated as different species.

Nature is replete with examples of identifiable populations known from different continents, mountain ranges, islands or lowland regions. While, traditionally, many of these have been treated as subspecies of widely-ranging species, recent studies relying on molecular biology have shown that many former “subspecies” have in fact been isolated for millions of years, which is long enough for them to have evolved into separate species.

Being a controversial matter in taxonomy – the science of classification – the ability to tell apart different species from subspecies across faunal groups is crucial. Given limited resources for conservation, relevant authorities tend only to be concerned for threatened species, with their efforts rarely extending to subspecies.

Figuring out whether co-habiting populations belong to the same species is only as tough as testing if they can interbreed or produce fertile offspring. However, whenever distinct populations are geographically separated, it is often that taxonomists struggle to determine whether they represent different species or merely subspecies of a more widely ranging species.

British bird expert Thomas Donegan has dedicated much of his life to studying birds in South America, primarily Colombia. To address this age-long issue of “what is a species?”, he applied a variety of statistical tests, based on data derived from bird specimens and sound recordings, to measure differences across over 3000 pairwise comparisons of different variables between populations.

Having analyzed the outcomes of these tests, he developed a new universal formula for determining what can be considered as a species. His study is published in the open-access journal ZooKeys.

Essentially, the equation works by measuring differences for multiple variables between two non-co-occurring populations, and then juxtaposing them to the same results for two related populations which do occur together and evidently belong to different “good” species. If the non-co-occurring pair’s differences exceed those of the good species pair, then the former can be ranked as species. If not, they are subspecies of the same species instead.

The formula builds on existing good taxonomic practices and borrows from optimal aspects of previously proposed mathematical models proposed for assessing species in particular groups, but brought together into a single coherent structure and formula that can be applied to any taxonomic group. It is, however, presented as a benchmark rather than a hard test, to be used together with other data, such as analyses of molecular data.

Thomas hopes that his mathematical formula for species rank assessments will help eliminate some of the subjectivity, regional bias and lumper-splitter conflicts which currently pervade the discipline of taxonomy.

“If this new approach is used, then it should introduce more objectivity to taxonomic science and ultimately mean that limited conservation resources are addressed towards threatened populations which are truly distinct and most deserving of our concern,” he says.

The problem with ranking populations that do not co-occur together was first identified back in 1904. Since then, most approaches to addressing such issues have been subjective or arbitrary or rely heavily upon expert opinion or historical momentum, rather than any objectively defensible or consistent framework.

For example, the American Herring Gull and the European Herring Gull are lumped by some current taxonomic committees into the same species (Herring Gull), or are split into two species by other committees dealing with different regions, simply because relevant experts at those committees have taken different views on the issue.

“For tropical faunas, there are thousands of distinctive populations currently treated as subspecies and which are broadly ignored in conservation activities,” explains Thomas. “Yet, some of these may be of conservation concern. This new framework should help us better to identify and prioritize those situations.”

Two different kinds of Three-striped Warblers (*Basileuterus tristriatus*) occurring in South America (left: East Andes of Colombia; right: a recently discovered population from the San Lucas mountains of Colombia). Note the differences in plumage coloration. While somewhat differing in voice, plumage and some measurements, the couple did not diverge as much as other related warblers that actually co-occur did. These are about as close as subspecies occurring on different mountain ranges could be. However, they marginally failed the proposed new benchmark for species rank.

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Original source:

Donegan TM (2018) What is a species? A new universal method to measure differentiation and assess the taxonomic rank of allopatric populations, using continuous variables. ZooKeys 757: 1-67. https://doi.org/10.3897/zookeys.757.10965

Additional information:

Donegan’s proposals were first presented orally at a joint meeting for members of the Neotropical Bird Club, British Ornithologists’ Club and Natural History Museum in London.

Dispatch from the field II: Students describe an elusive spider while stationed in Borneo

A mystery has long shrouded the orb-weaving spider genus Opadometa, where males and females belonging to one and the same species look nothing alike. Furthermore, the males appear to be so elusive that scientists still doubt whether both sexes are correctly linked to each other even in the best-known species.

Such is the case for Opadometa sarawakensis – a species known only from female specimens. While remarkable with their striking red and blue colors and large size, the females could not give the slightest hint about the likely appearance of the male Opadometa sarawakensis.

The red and blue female Opadometa sarawakensis — The red and blue female *Opadometa sarawakensis*

Nevertheless, students taking part in a recent two-week tropical ecology field course organized by the Naturalis Biodiversity Center and Leiden University, and hosted by the Danau Girang Field Centre (DGFC) on the island of Borneo, Malaysia, found a mature male spider hanging on the web of a red and blue female, later identified as Opadometa sarawakensis. Still quite striking, the male was colored in a blend of orange, gray, black, and silver.

At the brink of a long-awaited discovery and eager to describe the male, the students along with their lecturers and the field station scientific staff encountered a peril – with problematic species like the studied orb weaver they were in need for strong evidence to prove that it matched the female from the web. Furthermore, molecular DNA-based analysis was not an option at the time, since the necessary equipment was not available at DGFC.

On the other hand, being at the center of the action turned out to have advantages no less persuasive than DNA evidence. Having conducted thorough field surveys in the area, the team has concluded that the male’s observation on that particular female’s web in addition to the fact that no other Opadometa species were found in the area, was enough to prove they were indeed representatives of the same spider.

Adapting to the quite basic conditions at the DGFC laboratory, the students and their mentors put in use various items they had on hand, including smartphones paired up with headlights mounted on gooseneck clips in place of sophisticated cameras.

In the end, they gathered all the necessary data to prepare the formal description of the newly identified male.

Once they had the observations and the data, there was only one question left to answer. How could they proceed with the submission of a manuscript to a scholarly journal, so that their finding is formally announced and recognised?

Thanks to the elaborated and highly automated workflow available at the peer-reviewed open access Biodiversity Data Journal and its underlying ARPHA Writing Tool, the researchers managed to successfully compile their manuscript, including all underlying data, such as geolocations, and submit it from the field station. All in all, the authoring, peer review and publication – each step taking place within the ARPHA Platform‘s singular environment – took less than a month to complete. In fact, the paper was published within few days after being submitted.

This is the second publication in the series “Dispatch from the field”, resulting from an initiative led by spider taxonomist Dr Jeremy Miller. In 2014, another team of students and their mentors described a new species of curious one-millimetre-long spider from the Danau Girang Field Center. Both papers serve to showcase the feasibility of publication and sharing of easy to find, access and re-use biodiversity data.

“This has been a unique educational experience for the students,” says Jeremy. “They got to experience how tropical field biologists work, which is often from remote locations and without sophisticated equipment. This means that creativity and persistence are necessary to solve problems and complete a research objective. The fact that the students got to participate in advancing knowledge about this remarkable spider species by contributing to a manuscript was really exciting.”

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Original source:

Miller J, Freund C, Rambonnet L, Koets L, Barth N, van der Linden C, Geml J, Schilthuizen M, Burger R, Goossens B (2018) Dispatch from the field II: the mystery of the red and blue Opadometa male (Araneae, Tetragnathidae, Opadometa sarawakensis). Biodiversity Data Journal6: e24777. https://doi.org/10.3897/BDJ.6.e24777

Two new species of stone centipedes found hiding in larch forests in China

Scientists described two species of previously unknown stone centipedes from China. Now housed at the Hengshui University, China, where all members of the team work, the studied specimens were all collected in the leaf litter or under rocks in larch forests.

Having conducted their research across China, researchers Dr Sujian Pei, Yanmin Lu, Haipeng Liu, Dr Xiaojie Hou and Dr Huiqin Ma announced the two new species – Lithobius (Ezembius) tetraspinus and Hessebius luculentus – in two articles published in the open access journal ZooKeys.

Stone centipedes are the species which belong to the order Lithobiomorpha. These centipedes are anamorphic, meaning that they grow additional pair of legs as they moult and develop additional body segments. By the time they are fully grown, these count 15 in total. Unlike earlier predecessors, stone centipedes do not have the compound eyes we know from insects. Instead, stone centipedes see through simple eyes, sometimes a group of simple eyes, or, if living exclusively underground, they might have no eyes at all.

One of the newly discovered species, Lithobius (Ezembius) tetraspinus, is recorded from Hami City, Xinjiang Autonomous Region, northwestern China. The studied specimens were collected from moderately moist larch forest habitats at altitude of 950 to 1000. There, the small predominantly brown centipedes, measuring no more than about 13 mm in body length, were hiding under rodeside stones and leaf litter.

The second previously unknown centipede, Hessebius luculentus, discovered in Shandan County, Qinghai-Tibet Plateau, is slightly larger – reaching up to 20 mm. Its colours are a mix of yellow and brown with the odd grey or red hue. While it has the same preference for relatively moist habitats, this species lives at greater altitude. It has been reported from forest floor at about 1400 m above sea level.

In both papers, the authors point out that while the myriapod fauna of China remains generally poorly known, even less attention has been given to the order of stone centipedes.

The research articles are included in the special issue “Proceedings of the 17th International Congress of Myriapodology, Krabi, Thailand”. The congress, organised by Prof. Somsak Panha, Chulalongkorn University, Bangkok, was held in July 2017.

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Original source:

Pei S, Lu Y, Liu H, Hou X, Ma H (2018) Lithobius (Ezembius) tetraspinus, a new species of centipede from northwest China (Lithobiomorpha, Lithobiidae). In: Stoev P, Edgecombe GD (Eds) Proceedings of the 17th International Congress of Myriapodology, Krabi, Thailand. ZooKeys 741: 203-217. https://doi.org/10.3897/zookeys.741.19980

Ma H, Lu Y, Liu H, Hou X, Pei S (2018) Hessebius luculentus, a new species of the genus Hessebius Verhoeff, 1941 from China (Lithobiomorpha, Lithobiidae). In: Stoev P, Edgecombe GD (Eds) Proceedings of the 17th International Congress of Myriapodology, Krabi, Thailand. ZooKeys 741: 193-202. https://doi.org/10.3897/zookeys.741.20061

Spider eat spider: Scientists discover 18 new spider-hunting pelican spiders in Madagascar

In 1854, a curious-looking spider was found preserved in 50 million-year-old amber. With an elongated neck-like structure and long mouthparts that protruded from the “head” like an angled beak, the arachnid bore a striking resemblance to a tiny pelican. A few decades later when living pelican spiders were discovered in Madagascar, arachnologists learned that their behavior is as unusual as their appearance, but because these spiders live in remote parts of the world they remained largely unstudied–until recently.

At the Smithsonian’s National Museum of Natural History, curator of arachnids and myriapods Hannah Wood has examined and analyzed hundreds of pelican spiders both in the field in Madagascar and through study of pelican spiders preserved in museum collections. Her analysis, focused on spiders of the Eriauchenius and Madagascarchaea genera, sorted the spiders she studied into 26 different species–18 of which have never before been described. Wood and colleague Nikolaj Scharff of the University of Copenhagen describe all 26 pelican spider species in the Jan. 11 issue of the journal Zookeys.

Wood says pelican spiders are well known among arachnologists not only for their unusual appearance, but also for the way they use their long “necks” and jaw-like mouthparts to prey on other spiders. “These spiders attest to the unique biology that diversified in Madagascar,” she said.

Pelican spiders are active hunters, prowling the forest at night and following long silk draglines that lead them to their spider prey. When a pelican spider finds a victim, it swiftly reaches out and impales it on its long, fang-tipped “jaws,” or chelicerae. Then it holds the capture away from its body, keeping itself safe from potential counterattacks, until the victim dies.

Today’s pelican spiders are “living fossils,” Wood says–remarkably similar to species found preserved in the fossil record from as long as 165 million years ago. Because the living spiders were found after their ancestors had been uncovered in the fossil record and presumed extinct, they can be considered a “Lazarus” taxon. In addition to Madagascar, modern-day pelican spiders have been found in South Africa and Australia–a distribution pattern that suggests their ancestors were dispersed to these landmasses when the Earth’s supercontinent Pangaea began to break up around 175 million years ago.

Madagascar is home to vast numbers of plant and animal species that exist only on the island, but until recently, only a few species of pelican spiders had been documented there. In 2000, the California Academy of Sciences launched a massive arthropod inventory in Madagascar, collecting spiders, insects and other invertebrates from all over the island.

Wood used those collections, along with specimens from other museums and spiders that she collected during her own field work in Madagascar, to conduct her study. Her detailed observations and measurements of hundreds of specimens led to the identification of 18 new species–but Wood says there are almost certainly more to be discovered. As field workers continue to collect specimens across Madagascar, “I think there’s going to be a lot more species that haven’t yet been described or documented,” she said.

The spiders Wood personally collected, including holotypes (the exemplar specimens) for several of the new species, will join the U.S. National Entomological Collection at the Smithsonian, the second-largest insect collection in the world, where they will be preserved and accessible for further research by scientists across the globe.

All of the pelican spiders that Wood described live only in Madagascar, an island whose tremendous biodiversity is currently threatened by widespread deforestation. The new species add to scientists’ understanding of that biodiversity, and will help Wood investigate how pelican spiders’ unusual traits have evolved and diversified over time. They also highlight the case for conserving what remains of Madagascar’s forests and the biodiversity they contain, she says.

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Funding for this study was provided by the Danish National Research Foundation and the National Science Foundation.

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Original source:

Wood HM, Scharff N (2018) A review of the Madagascan pelican spiders of the genera Eriauchenius O. Pickard-Cambridge, 1881 and Madagascarchaea gen. n. (Araneae, Archaeidae). ZooKeys 727: 1-96. https://doi.org/10.3897/zookeys.727.20222

When lemons give you life: Herpetofauna adaptation to citrus orchards in Belize

Natural habitat areas exhibit similar abundances and diversity of herpetofauna as citrus orchards and reclaimed orchard forests in Stann Creek, Belize, reports a comparative study by researchers Russell Gray and Dr. Colin Strine of Suranaree University of Technology (SUT), Thailand.

The scientists utilized several drift-fence arrays equipped with double-funnel traps to monitor and compare reptile and amphibian communities in a lowland broadleaf forest, a lime orchard and a reclaimed citrus orchard at the Toucan Ridge Ecology and Education Society (TREES) field station. Their study was recently published in the open-access journal ZooKeys.

Often referred to as Central America’s “hidden gem” for its abundance of undisturbed rainforests and natural beauty, Belize has a long-standing record for vigorously protecting and maintaining their forested areas. However, just as in any other developing country, its primary sector is expanding with agricultural land clearings becoming more frequent with newly established properties.

Approximately midway through the study (June – September 2016), the site was hit by Hurricane Earl, a Category 1 hurricane. The hurricane-force winds altered the canopy cover significantly over the forested study sites, due to felled trees and broken branches.

Surprisingly enough, the herpetofauna remained relatively unchanged in the aftermath of Earl. The phenomenon revealed that not only were herpetofaunal communities lacking sensitivity to anthropogenic changes in the area, but also to extreme weather events, even though these had affected most of the standing vegetation.

Some notable observations occurred within three days of Hurricane Earl, according to Russell Gray:

“One of the trapping system was catching arboreal [tree climbing] snake species, like the cat-eyed snake and blunt-headed tree snake. This wasn’t only interesting because arboreal snakes were caught in terrestrial traps, but rather because they were never caught in our traps during the study up to this point.”

“Even more interesting is that they were caught exclusively in the manicured orchard area, which makes me wonder if they somehow predicted falling trees and fled to the only habitat without them. Some animals appear to forecast weather events due to sudden or drastic changes in environmental conditions. I wonder if this is a similar case.”

Amongst other notable scientific discoveries reported during the project were two new accounts of the Petén Centipede Snake (Tantilla hendersoni), one of which was the first documented male of the species. This secretive snake had only been documented once prior to the study and is the only endemic snake species to Belize.

Further noteworthy instances were two range extensions for relatively data deficient species – one for the Doflein’s Salamander (Bolitoglossa dofleini) and another for the Ringneck Coffee Snake (Ninia diademata).

Besides providing important data on herpetofauna assemblages in various disturbed and undisturbed habitats in Belize, the research identifies future conservation methods to be considered.

The study serves as new evidence that as long as agricultural areas remain surrounded with natural habitat buffers, they have little effect on herpetofaunal communities.

Replicates of this study are encouraged by the authors and can be utilized as a feasible and efficient way to monitor reptiles and amphibians in Belize.

Although Belize still preserves a considerable amount of intact forest cover, there are several on-going conservation concerns. Besides agricultural land clearings, there are constant struggles with xate poachers, or “Xateros”, on the Guatemalan border, as well as illegal logging activities and illegal off-season hunting.

Unfortunately, reptiles and amphibians have been understudied in comparison to other vertebrates and government action is rarely enforced on their conservation throughout the Neotropics.

A striking example of this relates to the only critically endangered reptile in Belize – the Hickatee turtle (Dermatemys mawii). Although the species is likely to become extinct, it is still traditionally collected for its culinary value, while its hunting is banned only in May.

In conclusion, the authors note that it is crucial to pay close attention to anthropogenic activity and the potential repercussions it may have on native species. With extensive and active efforts to study Mesoamerican herpetofauna, proper conservation efforts can be implemented and focused.

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Original Source:

Gray R, Strine CT (2017) Herpetofaunal assemblages of a lowland broadleaf forest, an overgrown orchard forest and a lime orchard in Stann Creek, Belize. ZooKeys 707: 131-165. https://doi.org/10.3897/zookeys.707.14029

An extraordinary cave animal found in Eastern Turkmenistan

A remote cave in Eastern Turkmenistan was found to shelter a marvelous cave-adapted inhabitant that turned out to represent a species and genus new to science. This new troglodyte is the first of its order from Central Asia and the first strictly subterranean terrestrial creature recorded in the country.

Kaptarhana cave is located at the foot of Koytendag Mountain, one of the most distinctive mountain landscapes in Central Asia. A curious amalgam of desert landscapes, often highly dissected by ravines, foothills with ridges, cuestas and fan plains, the mountain is a potential home to key biodiversity gems still awaiting discovery.

Also remarkable for its richness of caves and other limestone formations, Koytendag Mountain has more than 300 caves, sinkholes and potholes, hitherto registered from its territory, including the sixth largest cave system in Asia Gap Goutan/Promezdutachnaya stretched at more than 57 km underground. Also worthy of a mention is the beautiful cave Gulshirin, known for its snow white passages and extraordinary formations.

Another fine example, cave Kaptarhana, presents a unique habitat for a high number of cave-adapted animals, among which is the new species of a few millimetres long, pale and eyeless insect-like creature, whose relatives in the order Diplura also go by the name of two-pronged bristletails.

The scientists named it Turkmenocampa mirabilis, where the genus name (Turkmenocampa) refers to the creature’s country of origin (Turkmenistan), while the species name (mirabilis) means “unusual, amazing, wonderful, remarkable” in Latin to highlight its unique morphology and position among its relatives.

The new species is described in the open access journal Subterranean Biology by Dr. Alberto Sendra, University of Alcalá, Spain, Prof. Boris Sket, University of Ljubljana, and Prof. Pavel Stoev, National Museum of Natural History, Bulgaria.

In fact, Stoev and Sket were the first speleobiologists to visit and explore Kaptarhana in nearly 43 years. The survey was part of their study into the caves of Koytendag State Nature Reserve, Turkmenistan, conducted in 2015 and endorsed by a Memorandum of Understanding between the State Committee on Environment Protection and Land Resources of Turkmenistan and the Royal Society for the Protection of Birds.

To discover the new species, the scientists spent about 8 hours in the cave looking for specimens and placed pitfall traps with smelly cheese used as a bait. While visual observations had no success due to the cave being very spacious, a number of exemplars of the hitherto undescribed animal fell victims of the traps.

“What we have here is not only a new remarkable organism, but also an amazing and unusual cave critter that has undergone a long evolutionary journey to adapt to the underground environment of Central Asia,” says the lead author Alberto Sendra.

The authors see their latest discovery as a proof of the importance of Kaptarhana as a refuge for a number of endemic invertebrates and an opportunity to draw attention to its protection under the laws of Turkmenistan.

“While many speleobiologists consider the terrestrial cave fauna in Central Asia as poor, it is places such as Kaptarhana that can turn the tables by giving us new insights about the biodiversity richness, evolutionary history, formation and functioning of the underground ecosystems of this part of the world.” comments Stoev.

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Original source:

Sendra A, Boris Sket B, Stoev P (2017) A striking new genus and species of troglobitic Campodeidae (Diplura) from Central Asia. Subterranean Biology 23: 47-68. https://doi.org/10.3897/subtbiol.23.14631

Behind Green Eyes: New species of deep-water hermit crab finds itself unusual shelters

‘Green-eyed hermit crab’ is the common name for a new species recently discovered off the West Coast of South Africa. Apart from its magnetic stare, however, there is a number of characteristic morphological traits and an unusual home preference that all make the crustacean unique.

Formally named after the University of Cape Town (UCT) alumnus Dr Lara Atkinson, the new hermit crab Paragiopagurus atkinsonaeis described by PhD candidate Jannes Landschoff, UCT, and Dr Rafael Lemaitre, Smithsonian Institution, USA, in the open access journal ZooKeys.

The Green-eyed hermit crab measures merely 70 mm in length and sports a coloration of mottled orange nuanced with cream to white. Among its distinct traits is the significant sexual dimorphism, where the males grow much larger right chelipeds in comparison to females.

Much like other hermit crabs in its family (Parapaguridae), the little crustacean does not use the shells of other molluscs to shelter its vulnerable body, but rather finds a home in the soft, polypy masses built from sand and material created by sea anemones which go on to live on the backs of these crabs in an amazing symbiosis.

“So, when you hold it [the hermit crab], it’s just organic material glued together with some sand,” explains Jannes in the UCT’s announcement about their discovery.

“Even more curiously, parapagurids start off in the usual way, occupying a tiny gastropod shell. But these eventually become deposited within this non-calcified ‘amalgam’ created by the anemones. As the hermit crab grows, its live ‘shell’, or carcinoecia, grows with it.”

The new species was discovered during a three-week survey back in 2013, conducted by the Department of Forestry and Fisheries and the South African Environmental Observation Network in the shallower deep waters (199 m to 277 m) off the West Coast of South Africa. Lara was on board one of the vessels when an unusual green-eyed crab turned up among the numerous specimens collected in one of the trawls. It was at that moment that she noticed that there was something peculiar about it and sent it for identification.

Restricted to a surprisingly small area for no obvious reason, the new species might be just bringing up some very important conservation messages.

“The area isn’t noticeably biologically or oceanographically distinct, but more detailed sampling from the area will tell us more about the habitat conditions. Future studies need to take this into account and give the area more research attention. If there’s something unusual about the site, you’d want to be careful, especially with mining operations along the West Coast,” says Jannes.

“Incidents like these are flags for future protection. The bottom line is we know so little about these offshore habitats from an ecological point of view. And if you’re planning for a marine protected area, you have to know what it is you’re protecting in that area.”

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Original source:

Landschoff J, Lemaitre R (2017) Differentiation of three common deep-water hermit crabs (Crustacea, Decapoda, Anomura, Parapaguridae) from the South African demersal abundance surveys, including the description of a new species of Paragiopagurus Lemaitre, 1996. ZooKeys676: 21-45. https://doi.org/10.3897/zookeys.676.12987

New species of terrestrial crab found climbing on trees in Hong Kong

A new species of terrestrial crab has been found to climb trees on the eastern coast of Hong Kong. All specimens spotted during the survey have been collected at a height of approximately 1.5 – 1.8 m, walking on the bark of the branches at ebbing and low tides. The species is described in the open access journal ZooKeys.

Among the crab’s characteristic traits are squarish predominantly dark brown carapace, very long legs and orange chelipeds. The species is less than a centimetre long, with the studied specimens measuring between 8 and 9 millimetres, irrespective of their sex. However, the chelipeds of the males appear stout, while in females they are distinctly more slender.

The scientists who found the new species (Haberma tingkok), Dr. Stefano Cannicci, the Swire Institute of Marine Science at the University of Hong Kong, and Dr. Peter Ng, National University of Singapore, have placed the new species in a small genus, which now contains merely three species. In fact, Dr. Peter Ng has been involved in the discovery of all of them. He also led the team that established the genus 15 years ago, having collected a small previously undescribed species of mangrove crab from Singapore.

The discovery of the tiny crustacean once again proves how little is known about the diversity of these crabs in Hong Kong. Furthermore, the mangroves that make for the habitat of the new species are under severe impact by both pollution and land reclamation, which underlines the urgent need for their conservation.

Earlier this year, Dr. Peter Ng teamed up with Dr. Jose Christopher Mendoza to describe another new species of crab, collected from the rubble at the island of Guam and named after two of the main characters in J. K. Rowling’s Harry Potter fantasy series.

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Original source:

Cannicci S, Ng PLK (2017) A new species of micro-mangrove crab of the genus Haberma Ng & Schubart, 2002 (Crustacea, Brachyura, Sesarmidae) from Hong Kong. ZooKeys 662: 67-78. https://doi.org/10.3897/zookeys.662.11908

New species of Brazilian copepod suggests ancient species diversification and distribution

A new species of groundwater copepod has been discovered in the rocky savannas of Brazil – an ecosystem suffering from heavy anthropogenic impact. Upon description, the tiny crustacean turned out to also represent a previously unknown genus. It is described by Dr. Paulo H. C. Corgosinho, Montes Claros State University, Brazil, and his team in the open access journal Zoosystematics and Evolution.

Prior to the discovery of the new species, named Eirinicaris antonioi, only one genus of its subfamily (Parastenocaridinae) had been recorded in the Neotropical region, which comes to show that related species had already spread across a huge range when the ancient supercontinent Gondwana split apart.

The new copepod measures about 0,300 mm and can be told apart by its morphological characteristics, including unusual sensorial structures at the rear part of the body, as well as unique sexual dimorphism.

The copepods of the family Parastenocarididae are adapted to life in groundwater, where they thrive between sand grains. These tiny creatures measure less than 1 mm, ranging between 0,200 and 0,400 mm in length. They can be found in various microbiotopes along rivers, lakes and human-made structures, such as dug or artesian wells. Alternatively, these copepods might be associated with mosses and other semi-terrestrial environments.

“This is the first species described from Goiás state, Central Brazil,” explain the authors. “With the discovery of this new species our knowledge about the geographical distribution of the copepod family Parastenocarididae is increased. Our project highlights the vast amounts of undiscovered biodiversity of the Brazilian rocky savannas, which are under high anthropogenic threat.”

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Original source:

Corgosinho PHC, Schizas NV, Previattelli D, Falavigna da Rocha CE, Santos-Silva EN (2017) A new genus of Parastenocarididae (Copepoda, Harpacticoida) from the Tocantins River basin (Goiás, Brazil), and a phylogenetic analysis of the Parastenocaridinae. Zoosystematics and Evolution 93(1): 167-187. https://doi.org/10.3897/zse.93.11602