A team of researchers from the Pontifical Catholic University of Ecuador, in collaboration with the Natural History Museum of London, has announced the discovery of three new species of torrent frogs belonging to the genus Hyloscirtus. The study, recently published in the journal ZooKeys, combines genetic, genomic, morphological, and bioacoustic analyses, revealing hidden diversity in one of the planet’s richest ecosystems.
Maximum likelihood phylogram of Hyloscirtus for DNA sequences of mitochondrial (12S rRNA, 16S rRNA, ND1 and adjacent tRNAs) and nuclear genes (RAG1 and c-myc). Bayesian posterior probabilities (pp × 100) are shown above branches and bootstrap values below. Asterisks represent values of 100%. Missing values indicate posterior probabilities and bootstrap < 50. Amazonian species of the H. bogotensis group are shown with colored boxes. Outgroup species are not shown and include two species of Boana and two of Dendropsophus. Voucher museum numbers are shown before the species name. For Ecuadorian populations, the province is provided after the species name. Abbreviations for other countries at the end of terminals: BOL (Bolivia), COL (Colombia), PAN (Panamá), PER (Perú), and VEN (Venezuela). UCS: unconfirmed candidate species.
Frogs in the mist
The research focuses on frog populations inhabiting the Amazonian cloud forests, a region known for its high biodiversity and conservation challenges. By combining DNA sequencing (both genomic and mitochondrial), detailed morphological studies, and the analysis of mating calls, the authors have identified three new species:
Hyloscirtus maycu
Hyloscirtus elbakyanae
Hyloscirtus dispersus
Hyloscirtus dispersus
Hyloscirtus elbakyanae
Hyloscirtus elbakyanae
Hyloscirtus dispersus
Hyloscirtus maycu
Hyloscirtus maycu
A tribute to open knowledge
As a recognition of the value of free access to scientific information, one of the newly described species has been named after Alexandra Elbakyan, programmer and creator of Sci-Hub. This website provides free access to scientific articles, allowing researchers worldwide to consult studies that would otherwise be locked behind expensive subscriptions—especially in low- and middle-income countries. Sci-Hub has been instrumental in democratizing scientific knowledge on a global scale.
Variation in life of Hyloscirtus elbakyanae.
Importance of the study
“This discovery not only expands our understanding of cloud forest biodiversity but also highlights the urgent need to conserve these ecosystems in the face of growing environmental threats,” said Andrea Varela, lead researcher of the study.
Geographic distribution of Amazonian species of the Hyloscirtus bogotensis group. Stars represent the type locality of H. albopunctulatus, H. phyllognathus and H. torrenticola.
The paper also examines the impact of the Andes on the diversification of this group. Colonization events across the Andes have been very rare; in the studied group, only two such events were recorded, over 14 million years ago, both from the Amazon towards the Pacific basin. These findings underscore the crucial role of the Andean barrier in the evolution and distribution of these species, offering a unique perspective on the complex biogeographic history of the Andes—one of the most biodiverse ecosystems on Earth.
Research article:
Varela-Jaramillo A, Streicher JW, Venegas PJ, Ron SR (2025) Three new species of torrent treefrogs (Anura, Hylidae) of the Hyloscirtus bogotensis group from the eastern Andean slopes and the biogeographic history of the genus. ZooKeys 1231: 233-292. https://doi.org/10.3897/zookeys.1231.124926
“We have not only revived Francis Walker’s species Topiris candidella, from 1863, but also expanded our understanding of an entire group of small white moths.”
A moth neglected by experts for a century is found to have been collected by Alfred Russel Wallace 169 years ago
Cutting-edge techniques allowed scientists to show the moth as belonging to a genus comprising 14 species, 11 of which are new to science
One of the new species has been named after Greta Thunberg
Alfred Russel Wallace
Scientists at the Natural History Museum (NHM), London, have discovered that a long-overlooked moth specimen in the Museum’s collection was in fact collected by explorer and naturalist, Alfred Russel Wallace, in 1855. This was at the same time as he was formulating his own revolutionary ideas on the origins of species which he would go on to share with Charles Darwin.
The small white moth, Topiris candidella, was described in 1863 by Francis Walker but was dismissed in 1927 by leading entomologist Edward Meyrick as “better neglected” having suffered substantial damage due to historic storing practices. The moth has remained overlooked for nearly a century, until now.
Using a cutting-edge DNA sequencing method, NHM scientists extracted genetic material from a single fragment of one of the specimen’s remaining legs and connected it to a group of moths found throughout South East Asia.
The scientists were able to prove that rather than being a single neglected species, Topiris is in fact a genus of 14 species, including 11 species which are new to science and described today in the paper published in ZooKeys.
One of these species is named Topiris thunbergella, in honour of Greta Thunberg and her work in raising awareness of the environmental pressures on the native forests of South East Asia.
A new to science species of land snail was discovered by a group of citizen scientists working together with scientists…
Dr David Lees, Senior Curator for Microlepidoptera at the Natural History Museum, adds, “This discovery highlights the incredible potential of modern DNA analysis to reveal the evolutionary history of species, even from fragmented and long-forgotten specimens.
“By applying this innovative sequencing technique, we have not only revived Francis Walker’s species Topiris candidella, from 1863, but also expanded our understanding of an entire group of small white moths.”
During their research, David and fellow moth expert, Mark Sterling, found that a hidden label under the pin of the broken moth bore the handwritten letters “SAR”, a clue that this moth had been collected by Alfred Russel Wallace as part of over a thousand moths he collected at Rajah Brooke’s Forest retreat.
Topiris albidella
Paralecta rosiflora
Topiris thunbergella
Topiris salva
This was in December 1855, just months before he published his ‘Sarawak Law’ paper, which eventually led to a joint reading (at Darwin’s request) of their theories of evolution through natural selection.
Beyond the scientific breakthrough, the study has wider conservation implications. Of the 24 species reviewed in their paper, only three have been recorded since 2000, highlighting the urgent need for biodiversity monitoring in this region.
Mark Sterling added, “The 80 million specimens currently held in the Natural History Museum’s collections continue to be a critical resource for understanding biodiversity and assessing the effects of environmental change.”
Research article:
Sterling MJ, Price BW, Lees DC (2025) A revision of the hitherto neglected genus Topiris Walker, 1863 (Lepidoptera, Xyloryctidae) with taxonomic notes on the genus Athrypsiastis Meyrick, 1910. ZooKeys 1229: 297-368. https://doi.org/10.3897/zookeys.1229.119155
This press release was originally published by the National History Museum, London. It is republished here with permission.
Recognizing the Sundaic rhinoceros as a separate genus not only improves scientific understanding but also has important implications for conservation efforts.
A new study revealed significant differences in the appearance and behaviour of the two one-horned Asiatic rhinoceros species, challenging long-standing classifications and supporting a re-evaluation of their status.
Sundaic rhinoceros (Eurhinoceros sondaicus). Photo by Toby Nowlan
The study, led by zoologist Francesco Nardelli and paleontologist Kurt Heißig, highlights how millions of years of evolutionary pressures have shaped the distinct adaptations of the Indian (Rhinoceros unicornis) and Sundaic (Rhinoceros sondaicus)rhinoceroses. The critically endangered Sundaic rhinoceros has a slender skull, a broader and lower back of the head, and a shorter nose and teeth suited for browsing leaves. In contrast, the Indian rhinoceros has a more robust skull and taller teeth adapted for grazing on grasses.
“Adaptations of large terrestrial mammals to various environments are linked to the diversity of food items they can consume, which is reflected in the variation of their dental and cranial morphologies,” the researchers write in their paper, published in the journal ZooKeys. “In rhinoceroses, these adaptations are identified in their teeth structure and head posture.”
The Sundaic rhinoceros, now confined to Java’s Ujung Kulon peninsula, is a browsing species with uniquely polygonal-patterned skin and, unlike any other living rhinoceros, hornless females. In contrast, the Indian rhinoceros is a grazer of riverine grasslands in northern India and Nepal. With deep skin folds and a heavier build, the Indian rhinoceros is considerably larger than its Sundaic relative. It is superseded in size only by the elephant and the white rhinoceros, with males weighing more than 2,000 kg and females reaching 1,600 kg.
Indian rhinoceros (Rhinoceros unicornis). Photo by Olivier Bacquet
Fossil evidence confirms that these differences evolved independently over a long period of time. The authors maintain that they represent fundamental anatomical and ecological distinctions and reflect deep evolutionary adaptations.
The behaviour of the two species also differs significantly, with the Sundaic rhinoceros being solitary wanderers and Indian rhinoceros forming temporary crashes.
“Both species possess unique adaptations for survival, emphasising the importance of understanding their systematics for effective conservation,” the researchers write in their paper.
Based on these findings, the scientists propose a more precise scientific name for the Sundaic rhino: Eurhinoceros sondaicus. “Recognizing Eurhinoceros sondaicus as a distinct genus provides a more accurate reflection of its evolutionary history and ecological specialization,” they assert. “This refined classification not only enhances our understanding of rhinoceros evolution but also provides a clearer framework for conservation planning, helping to tailor strategies for the protection of these critically endangered animals.”
Original Source:
Nardelli F, Heißig K (2025) A taxonomic review of the genus Rhinoceros with emphasis on the distinction of Eurhinoceros (Perissodactyla, Rhinocerotidae). ZooKeys 1230: 303-333. https://doi.org/10.3897/zookeys.1230.127858
The frog Alsodes vittatus is an elusive creature – described in 1902, it managed to go undetected for more than a century. Now, after a decade of investigation, a research team has rediscovered it, in its first sighting after 130 years.
A female individual of Alsodes vittatus.
Researchers from the Laboratory of Systematics and Conservation of Herpetozoa (SyCoH) of the University of Concepción, Chile – Dr. Claudio Correa, engineer in renewable natural resources Edvin Riveros Riffo, and biologist Juan Pablo Donoso, have published their extraordinary discovery in the journal ZooKeys.
Alsodes vittatus was scientifically described in 1902 by Rodulfo Amando Philippi, a German naturalist living in Chile. French entomologist Philibert Germain had discovered the species in 1893 at the former Hacienda San Ignacio de Pemehue in La Araucanía Region, Chile, and brought three specimens to Philippi for description. Since then, no one has seen the species again, despite multiple search efforts.
A male individual of Alsodes vittatus.
Between 1995 and 2002, several researchers unsuccessfully tried to find it in the Pemehue area, at the northwestern end of the former estate. In 2015 and 2016, new expeditions led by Claudio Correa and Juan Pablo Donoso managed to locate two populations of Alsodes in the same area, but the individuals they saw lacked A. vittatus’ distinctive white or yellow stripe on the back, suggesting they likely belonged to a different species.
A male individual of Alsodes vittatus.
“The main challenge in locating it was the lack of precision in the description of its type locality,” say the researchers. “In Germain’s time, the Hacienda San Ignacio de Pemehue was an estate of enormous size, and the naturalist did not specify the exact place where he collected the specimens.”
To locate the species, Correa and his team had to reconstruct the route that Germain could have followed within the estate by studying his publications and other historical documents. In 2023 and 2024, Claudio Correa and Edvin Riveros followed the reconstructed route, entering the former estate from the southeastern end. There, they found two populations of A. vittatus in the Lolco and Portales river basins in La Araucanía region, confirming the existence of this enigmatic species after more than a century without records.
The habitat of Alsodes vittatus.
This is an important milestone for South American herpetology and the conservation of biodiversity in the southern cone. Most of the other species in the genus Alsodes are either threatened with extinction or we don’t know enough about them to assess their status, and shedding light on where and how they live is the first step in protecting them.
“The rediscovery of A. vittatus allowed us to obtain, more than a century after its description, the first biological and ecological data on the species. Field observations also indicate that this amphibian faces several significant threats and that it could be considered endangered,” the researchers warn. “In a broader context, this rediscovery demonstrates the limited biological, evolutionary and biogeographic knowledge of the amphibians that inhabit the southern cone of South America, emphasizing the urgency of their study and conservation.”
Research article:
Correa C, Riveros-Riffo E, Donoso JP (2025) Lost for more than a century: the rediscovery of Alsodes vittatus (Philippi, 1902) (Anura, Alsodidae), one of the rarest and most elusive amphibians from Chile. ZooKeys 1230: 195-212. https://doi.org/10.3897/zookeys.1230.135523
When Rebecca Tarvin was a graduate student studying toxins in the skins of poisonous frogs, she and her colleague Mileidy Betancourth-Cundar collected a frog in Colombia that they suspected was a new species. It differed in coloration from a similar Colombian frog in the genus Epipedobates and had a different mating call.
Rebecca Tarvin and Mileidy Betancourth-Cundar attempt to catch a frog. Photo credit: Juan Camilo Ríos Orjuela
In 2022, eight years later and a newly appointed assistant professor of integrative biology at the University of California, Berkeley, Tarvin met up with Colombian biologists to collect more of these frogs and confirm a new species. Such “holotype specimens” are necessary to document a new species for posterity. Collecting specimens and identifying new species also helps scientists track the impact of environmental changes and understand the evolutionary origin of traits such as skin toxins, which may one day have medical uses.
Some of the specimens including the holotype (bottom left) prepared for the Museo de Historia Natural C. J. Marinkelle at the Universidad de los Andes in Bogotá, Colombia, and UC Berkeley’s Museum of Verterbrate Zoology. Photo credit: Rebecca D. Tarvin, UC Berkeley
Collecting the frogs was easy; they seem to thrive along roadsides and in semiurban areas. But what to name the species? A Colombian colleague played for the team a tape of local marimba-based music called bambuco, and one style, called bambuco viejo, or currulao, stood out. The name Epipedobates currulao seemed appropriate, and with this month’s publication of a paper describing the new species in the journal ZooKeys, it’s now official.
Epipedobates currulao. Photo credit: Juan Camilo Ríos Orjuela
“We ended up going with currulao because we liked how it brought in the human perspective,” Tarvin said. “The frog is part of the sound landscape; when they call, it’s part of the background noise in the region. Similarly, currulao is more than just a genre of music. It’s also the cultural practices around the music, the gathering, dancing and the relationship-forming aspects of the experience.”
A performance by Cantadoras del Pacifico at the 2009 Smithsonian Folklife Festival. Currulao, which combines marimbas and drums, is popular in black communities along Colombia’s Pacific coast.
Tarvin is still investigating the toxins produced by frogs in the genus Epipedobates, which is small, containing about eight species, but is the most recently evolved group of poisonous frogs in South America. By comparing the genetics of these frogs with other poison frog groups, she hopes to understand how their chemical defense technique evolved. Most poisonous animals are brightly colored to advertise their unpalatability, such as the Monarch butterfly’s bright orange color and the gaudy orange, black and blue of poison dart frogs. But Epipedobates frogs are more subtly colored, if not downright drab. Perhaps, she said, bright coloration evolves after the frogs develop their toxic defenses.
An adult individual of Epipedobates currulao in Vadrilleros, Valle de Cauca, Colombia. Photo credit: Mileidy Betancourth-Cundar
Epipedobates acquired its chemical defenses more recently than any other group in the poison frog family and shows the largest range in color and defense, Tavin said, but they’re also interesting because of how they acquire their toxicity.
“What’s unique about poison frogs, specifically, is that they sequester toxins from their food, so it’s an entirely different kind of defense that requires an entirely different physiology, compared to venom-producing animals, like snakes and bees,” she said. “Poison frogs eat arthropods that have small amounts of chemicals that can be either toxic or distasteful. And then they accumulate those to levels that become relevant for their own predators.”
Tarvin offers one piece of advice: Because they’re covered in poisons, don’t lick your fingers after picking one up.
Research article:
Betancourth-Cundar M, Ríos-Orjuela JC, Crawford AJ, Cannatella DC, Tarvin RD (2025) Honoring the Afro-Colombian musical culture with the naming of Epipedobates currulao sp. nov. (Anura, Dendrobatidae), a frog from the Pacific rainforests. ZooKeys 1226: 139-170. https://doi.org/10.3897/zookeys.1226.123803
This story was originally published by UC Berkeley. It is republished here with permission.
More than 99.9% of global species diversity is found within soils, according to a new review paper published in ZooKeys.
Comparing different studies on soil biota, author Robert J. Blakemore challenges previous estimates, which suggested a much lower proportion of life in soils. “Most life is found in Soil and most is microbial, affected by the current mass extinction event having profound effects influencing all evolution on Earth,” he says.
From the review paper: “Micro monde” progressions with microbial proportions greatly increased from Blakemore after Larsen et al.
“Soil filters and stores freshwater stocks (being subject to Earth tides!) and, as well as ~ 99% of human food, it provides most building materials plus many of our essential medicines/antibiotics. Thus, an important metric must be the scope and snapshot status of living or dormant Soil biota.”
One of the most recent estimates suggests that the soil realm is home to approximately 2.1 x 1024 taxa, which is thought to be more than 99.9% of global species biodiversity, mainly comprised of bacteria and other microbes.
The more you look, the more you find (lhs, pin-head after SCIENCE 2002; rhs, Bacteria on a pin tip courtesy Dr Kateryna Kon of Kharkiv National Medical University).
“Soil also supplies >99.7% of calorific food (just 0.3% from ocean plus 0.3% from aquaculture mostly fed with farmed stockfeed); with just about 6% total global protein from all fish; soil filters and stores most freshwater and is thus responsible for hydrological-recycle rainfall on land,” Blakemore says.
“My other paper last year on Biomass shows Soil houses >99% of organic carbon and it is the loss of this vital resources that is the greatest contributor to atmospheric carbon increase, despite the ‘greening’ effect on land.”
However, this immense biodiversity is under threat. “Soil erosion is one of our greatest global issues of concern, and one of the most ignored. Droughts, floods, deserts, poisoning, capping and so on are affecting all soils and, due to this massive soil loss, plants are incapable of thriving. At the same time deforestation continues, mainly clearing for cattle pastures or soy fields to feed CAFO cows (or other stock),” the author says.
The loss of soil biodiversity has far-reaching consequences, leading to ecosystem degradation, reduced food production, and loss of potentially valuable resources, such as sources of medicines and antibiotics. Furthermore, soil loss inevitably results in silent species loss, mostly of microbes that are most dominant in soils, but also of more obvious soil macrobes, and specifically of earthworms, which are vital for soil health.
Around 7,000 ‘true’ earthworm species have been described, but estimates suggest the total number of earthworm species may be closer to 30,000-35,000 globally. “Due to their high endemicity and Soil’s heterogeneity, their unknowns are legion,” the author notes in his paper.
From the review paper: Global Soil Biodiversity Atlas (GBIF 2016) reporting ~ 667,000 soil biota or just about one third of known 2 million). Note that earthworms have 7,000 known and > 30,000 estimated species. Bacteria had 15,000 known species but estimated over one million (< 1.5% described). However, when microbes (excluding viruses) are properly considered and counted, as herein, soil unknowns are much higher (likely just < 0.0001% known at best). Vascular plants add ~ 400,000 species (cf. Anthony et al. 2023 with 466,000 angiosperm “Plantae”).
Earthworms enhance microbial activity, improve soil structure, and promote plant growth, which is why Blakemore suggests that “a simple solution to soil degradation is to attempt, in any way and at all times, to preserve and enhance earthworm populations.”
“Healthy soils are carbon-rich, hugely biodiverse and are a massive sponge for water – neither flooding nor drying during climatic extremes,” the author says, a reminder that healthy soils are not only vital for maintaining biodiversity, but also indispensable in supporting essential functions of planet and human survival.
“Due to the most pressing problem of topsoil erosion and irreversible extinction losses, a major shift should be realizing the overwhelming importance and fragility of our precious Soil,” Robert Blakemore writes in his paper.
Calling for a change in attitudes and funding to recognise the true scope of soil biodiversity, he encourages the formation of a dedicated Soil Ecology Institute that would catalogue, research and reverse the mass degradation of our planet’s most crucial, yet most neglected ecosystem – that of the Soil Realm.
Picture in your mind the discovery of a new species.
What do you see? Researchers cutting through dense, untouched rainforests? Perhaps a submarine plunging into a deep-sea trench, illuminating a new world?
Well, it’s not always quite so dramatic. In fact, researchers in China discovered Branchiostegus sanae when they were scrolling through online seafood markets and noticed some deepwater tilefish with unique cheek patterns.
Branchiostegus sanae. Credit: Huang et al.
These red-and-white facial markings reminded the research team of the Studio Ghibli character San from Princess Mononoke, whom they chose to honour in their naming of the species.
Published in the open-access journal ZooKeys, Branchiostegus sanae is a deepwater tilefish belonging to the family Branchiostegidae. Researchers confirmed its new-species status using genetic analysis, and chose “sanae” as the specific epithet (that’s the part that differentiates species within a genus), in a nod to Hayao Miyazaki’s animated creation.
Branchiostegus sanae at a seafood market. Credit: Jiangyuan Chen.
“Finding a new species in this group is a rare and fortunate event, especially one as distinctive as Branchiostegus sanae.
“In Princess Mononoke, San is a young woman raised by wolves after being abandoned by her human parents. She sees herself as a part of the forest and fights to protect it. The film delves into the complex relationship between humans and nature, promoting a message of harmonious coexistence between the two: something we hope to echo through this naming.”
Lead author, Haochen Huang.
The Chinese fishermen who sell the new-to-science species call it the“鬼马头鱼” (ghost horsehead fish), and this also contributed to the species name because, fittingly, “Mononoke” (もののけ) refers to supernatural spirits in Japanese folklore.
As their name suggests, deepwater tilefish are found at great depths, with some species found 600 m below the surface. They are important food fish, commonly found in seafood markets in East and Southeast Asia.
Branchiostegus sanae is far from the only new species discovered at a seafood market. Indeed, a new giant isopod was recently dicovered in the same way – and also recieved a pop-culture inspired name. Check it out below!
So far only 31 species are described in the family Branchiostegidae, and 19 species in the genus Branchiostegus. From 1990 to 2024, only three new species of Branchiostegus have been described.
Other species of the genus Branchiostegus found in Chinese waters. Credit: Huang et al.
The study, led by researchers from the South China Sea Institute of Oceanology, Chinese Academy of Science, Zhejiang University and Ocean University of China, involved a combination of morphological analysis and genetic sequencing. Specimens were deposited in prestigious marine biological collections in China to facilitate future research.
Original study
Huang H, Chen J, Ke Z, Zhang C (2025) Branchiostegus sanae, a new species of deepwater tilefish (Eupercaria, Branchiostegidae) from the South China Sea. ZooKeys 1227: 129–142. https://doi.org/10.3897/zookeys.1227.130512
Happy Lunar New Year! For more than a billion people worldwide, today is a day of gifts, dancing, celebration and – of course – plenty of delicious food.
Coinciding with the first new moon of the lunar calendar, the 29th of January marks the beginning of a vibrant 15-day festival, which includes 7 days of holiday in China.
As 2025 is the Year of the Snake, we have gathered some of favourite studies celebrating the the scaly world of serpents to celebrate the occasion!
The tug-of-war coral snakes
A different kind of food fight.
A study published in Herpetozoa includes incredible footage of two red-tailed coral snakes (Micrurus mipartitus) engaging in a tug-of-war over a caecilian, a legless amphibian.
Check out the video below.
Two Micrurusmipartitussnakes tugging prey in opposite directions. Credit: Henrik Bringsøe and Niels Poul Dreyer.
The event marked the first documented wild case of kleptoparasitism, or food theft, within the family Elapidae.
Rhynchocalamus hejazicus is a recently discovered and secretive snake species from the Hejaz region of Saudi Arabia.
Upon the species’ discovery, researchers dubbed the stylish serpent “the missing piece of the puzzle” as it fills a large distribution gap for its genus.
Published in Zoosystematics and Evolution, the research also includes a completely black variation of of the species known as a ‘melanistic morphotype.’
An expedition into the jungles and cloud forests of Colombia and Ecuador revealed five dazzling new species of eyelash vipers, previously misidentified as one species.
Published in Evolutionary Systematics, the study received global attention from publications such as National Geographic thanks to the taxonomic importance and visual appeal of the research.
Red-wine morph of the Central American Eyelash-Pitviper (Bothriechis nigroadspersus), photographed in the Caribbean Island Escudo de Veraguas, off the coast of Panamá.Credit:Alejandro Arteaga.
Two species of African shovel-snout snakes, Prosymna confusa and Prosymnalisima, were published as new species in ZooKeysback in 2022.
Endemic to Angola, the snakes have unique beak-like snouts that allow them to dig into sandy soils. They also have backward pointed lancet-shaped teeth that they use for cutting open lizard eggs.
Kalahari shovel-snout snake (Prosymna lisima) from southeastern Angola. Credit: Chad Keates.
As they spend the majority of their time underground, these species were not the easiest to study, but they are certainly a treat for the eyes when they surface their wedge-shaped heads!
The Pensoft journal collection contains innumerable snake studies, so we could go on forever sharing our favourites. Instead, we will wish you a happy and prosperous 2025 filled with plenty of safe snake encounters.
Giant isopods of the genus Bathynomus, which can reach more than 30 cm in length, are known as bọ biển or “sea bugs” in Vietnam. For the first time, one such species was described from Vietnamese waters and named Bathynomus vaderi. The name “vaderi” is inspired by the appearance of its head, which closely resembles the distinctive and iconic helmet of Darth Vader, the most famous Sith Lord of Star Wars.
The head of Bathynomus vaderi. Image by Nguyen Thanh Son
Bathynomus vaderi belongs to a group known as “supergiants,” reaching lengths of 32.5 cm and weighing over a kilogram. So far, this new species has only been found near the Spratly Islands in Vietnam, but further research will probably confirm its presence in other parts of the South China Sea.
Dr. Nguyen Thanh Son holding a giant specimen of another species of giant isopod found in Vietnam (B. jamesi) that weighed 2.62 kg from a seafood market in Hanoi, October 2024. Photo by Peter Ng
Giant isopods like Bathynomus vaderi have become an expensive delicacy in Vietnam. Until 2017, local fishermen only sold them as a bycatch product for low prices, but in recent years the media has drawn public attention to this unusual seafood. Some go as far as claiming it’s more delicious than lobster, the “king of seafood”.
Prof. Peter Ng examining giant isopods from a seafood market in Hanoi, October 2024. Photo by Nguyen Thanh Son
These animals have been commercially fished by trawlers operating in various deep-water parts of Biển Đông ( East Sea, Vietnamese part of the South China Sea) and offshore of provinces in south-central coastal of Vietnam. Over the last five years, it has become common to see themsold alive in some seafood markets in Hanoi, Hồ Chí Minh City, and Đà Nẵng City. Some outlets and restaurants even advertise the saleof these “sea bugs” online on various social media platforms, including how best to cook them!
Dr. Conni Sidabalok examining individuals of Bathynomus vaderi at Lee Kong Chian Natural History Museum, Singapore. Photo by Rene Ong
In March 2022, staff from Hanoi University purchased four giant isopod individuals from Quy Nhơn City and sent two of them to Peter Ng from the Lee Kong Chian Natural History Museum in the National University of Singapore for identification. Peter Ng has a very active crustacean laboratory in Singapore and has worked on the deep-sea fauna from many parts of Asia. He subsequently co-opted Conni M. Sidabalok from the National Research and Innovation Agency Indonesia, who had described Bathynomus from southern Java with him. Together with Nguyen Thanh Son from the Vietnam National University, who is the resident crustacean researcher there, they studied the specimens. In early 2023, they realised they had specimens of a so far undescribed species. Now, they have published their findings in the open-access journal ZooKeys.
The discovery of a species as strange as Bathynomus vaderi in Vietnam highlights just how poorly we understand the deep-sea environment. That a species as large as this could have stayed hidden for so long reminds us just how much work we still need to do to find out what lives in Southeast Asian waters.
There is an urgent need to better understand our deep-sea biodiversity as humans increasingly endeavour to exploit this habitat for fisheries, oil and gas, and even minerals. The sustainable fishery of giant isopods just adds to the many challenges we face. And the first step is to know what lives there.
Research article:
Ng PKL, Sidabalok CM, Nguyen TS (2025) A new species of supergiant Bathynomus A. Milne-Edwards, 1879 (Crustacea, Isopoda, Cirolanidae) from Vietnam, with notes on the taxonomy of Bathynomus jamesi Kou, Chen & Li, 2017. ZooKeys 1223: 289–310. https://doi.org/10.3897/zookeys.1223.139335
Back in 2018, I began conducting fieldwork on grasshoppers in Texas. Among the specimens I collected that year, I noticed something intriguing—what appeared to be a new species of Agroecotettix. That initial discovery set the stage for years of research, stretching through 2024. During this time, I continued to collect Agroecotettix specimens and studied collections from several institutions, including the Academy of Natural Sciences in Philadelphia, the University of Michigan Museum of Zoology, Brigham Young University, and the Mississippi Entomological Museum.
Agroecotettix aristus.
By analyzing these specimens, I identified 16 new species of Agroecotettix from the United States and Mexico. Interestingly, most of these species are associated with mountainous of Texas and Mexico. Some also inhabit the South Texas Plains ecoregion and the Edwards Plateau.
Habitat and Behavior of Agroecotettix
Agroecotettix grasshoppers are often found on thorny, leguminous shrubs such as Acacia and Vachella. Mesquite is typically not a host. In the Big Bend region of Texas, I often found them on Sotol—sometimes consuming pollen, other times seeking shade beneath the leaves during the heat of the day.
Individuals of Agroecotettix dorni roosting during the heat of the day on Dasylirion leaves
One sweltering day in Big Bend National Park, it was 113°F, and I was trudging through Boquillas Canyon, searching for grasshoppers. After two hours of seeing a couple grasshoppers, I was ready to leave. Then, glancing up, I spotted 40 or 50 grasshoppers clustered on the undersides of Sotol leaves, sheltering from the mid-day sun. Many of them were Agroecotettix, alongside other flightless desert grasshoppers like Phaulotettix and Netrosoma. It was just like picking fruit off a tree—no net needed.
A view from Big Bend National Park.
Agroecotettix crypsidomus.
Much of what we now know about Agroecotettix species stems from the work of Dr. Theodore Cohn. During the 1950s and 1960s, he conducted extensive fieldwork in Mexico, often in areas that are now too dangerous to access. His collections were invaluable for identifying several of the new species, highlighting the enduring importance of historical specimens and natural history collections.
Naming these species offered a unique opportunity to honor individuals and ideas that have influenced me such as:
LeVar Burton: One species is named after this the Reading Rainbow and Star Trek icon. Burton is an American treasure who has inspired a love of reading in millions, including me. As a child, I grew up watching Reading Rainbow and later found myself reading those same books to my own kids during school events.
Ted Turner: Another species honors Ted Turner, the entrepreneur and conservationist. Turner’s efforts to preserve vast swaths of the western U.S. have will have a lasting impact on biodiversity.
Image of Michael Dorn courtesy of Supercon Conventions under a CC BY 2.0 license
Michael Dorn: Known for playing Worf on Star Trek, Dorn inspired another species name. Work was always my favorite character. A portion of this species anatomy resembled a Klingon weapon, making the connection apt.
IDIC: One species is named after the Vulcan philosophy of “Infinite Diversity in Infinite Combinations.” This Star Trek principle seemed a fitting name for a species in this group of cryptic species.
Jay Silverheels: another species honors Silverheels’ cultural impact and the Texas landscapes where the series was set. A Native American athlete and actorwho most famously portrayed the fictional character Tonto in “The Lone Ranger” television series from 1949-1957, Silverheels was one of the first Native American actors to portray a major Indigenous character on a television series. Throughout his career, Silverheels advocated for more inclusion of Indigenous people in media and founded the Indian Actors Workshop in Los Angeles during the 1960’s.
Clayton Moore: Known for playing the Lone Ranger, “moorei” honors Clayton Moore for his portrayal of this fictional Texas Ranger that embodied justice, bravery, and connection to the American West.
Frida Kahlo: The species name kahloae patronym the iconic Mexican painter known for her vivid and symbolic artwork. Her enduring connection to Mexican culture makes her an apt figure to be commemorated through this species, which is endemic to Mexico.
Exploring the Agroecotettix genus has been a journey into the unexpected. What began as a few curious specimens turned into the discovery of 16 species (and counting). The biodiversity of this group, particularly in Mexico, is likely even greater than we currently realize.
The natural world never ceases to amaze. Just when you think you’ve seen it all, you look a little closer using new techniques or tools—and suddenly, there’s a universe of diversity waiting to be discovered.
Research article:
Hill JG (2024) Desert diversification: revision of Agroecotettix Bruner, 1908 (Orthoptera, Acrididae, Melanoplinae) with descriptions of sixteen new species from the United States and Mexico. ZooKeys 1218: 177-230. https://doi.org/10.3897/zookeys.1218.133703
