Tag: species richness

Three New Species of Conger Eel Discovered in the Deep Waters Around Taiwan

Researchers have now described three new species of the conger eel genus Gnathophis, drawing on 130 specimens collected from the deep sea.

Researchers from National Taiwan Ocean University, University of Taipei and the Smithsonian Institution have now described three new species of the conger eel genus Gnathophis, drawing on 130 specimens collected from the deep sea. The findings raise the number of Gnathophis species known from Taiwan from two to five.

Members of this genus are medium-sized eels of tropical and subtropical deep waters, recognisable by a blunt tail tip, a fleshy snout that projects beyond the teeth, and a small fleshy keel on the underside of the snout.

The team compared vertebral counts, the pores of the sensory lateral line, colouring and tooth patterns, and for two of the species they added DNA barcoding to confirm the distinction. The two barcoded species differ from each other by roughly 4.4 to 4.9 per cent in the gene examined, well beyond the variation seen within a single species.

Each name tells a small story about where the eel was found or how it looks:

  • Gnathophis kbalanensis (Kbalan’s conger): named after “Kbalan”, an ancient name for the Yilan region of northeastern Taiwan, in use roughly 800 to 1,300 years ago. It is also known as Cabaran in Spanish and Kat-má-lán in Taiwanese. The largest specimen measured 472 millimetres, and the species is recognised by its blackish fins and a high vertebral count of 134 to 137.
  • Gnathophis melanurum (black tail conger): named from the Greek melan, meaning black, and urum, meaning tail, in reference to its black tail fin. Its dorsal and anal fins are pale, which makes the dark tail stand out. It was found off both northeastern and southwestern Taiwan, mostly at depths of around 200 to 300 metres.
  • Gnathophis nanhaiensis (Nan Hai’s conger): named after “Nan Hai”, the Chinese name for the South China Sea, where the holotype was collected at a depth of about 509 metres. The Latin ending -ensis means “originating in”. Known from only two specimens, it has pale fins and the highest vertebral count of the three, at 139 to 143.
  • Gnathophis kbalanensis sp. nov. Credit: Jian-Fu Huang, et al.
  • Gnathophis melanurum sp. nov. Jian-Fu Huang, et al.
  • Gnathophis nanhaiensis sp. nov. Jian-Fu Huang, et al.

The first two species share a feature that sets them apart from some of their relatives: the lateral line pores above the pectoral fin are raised, and the peritoneum, the lining of the body cavity, is black. Several of the specimens were ripe females carrying loose eggs, which suggests these waters may serve as spawning grounds.

The study also tidies up the regional record. An eel previously listed in Taiwan as Gnathophis xenica was confirmed to be a misidentification, and the researchers found no evidence to split the widespread G. heterognathos into separate species.

The work is dedicated to the late Dr David G. Smith, whose contribution to eel taxonomy inspired the first author.

Original source:

Huang J-F, Liao Y-C, Chan T-Y, Chen H-M, Smith DG (2026) The congrid eel genus Gnathophis in Taiwan (Anguilliformes, Congridae), with descriptions of three new species. ZooKeys 1287: 11-46. https://doi.org/10.3897/zookeys.1287.183842

For more articles on zoology, visit the ZooKeys website and follow the journal on BlueSky and Facebook.

A Blind Snake on the Roof of the World: New Burrowing Species Discovered Beneath the Stones of the Qinghai-Xizang Plateau

Scientists from Yibin University and collaborating institutions have formally described Indotyphlops gyirongensis, the Gyirong blind snake.

High on the Qinghai-Xizang Plateau, often called the “Roof of the World,” a new species of snake waits beneath the stones…

Scientists from Yibin University and collaborating institutions have formally described Indotyphlops gyirongensis, the Gyirong blind snake, a discovery that adds a new member to one of the least understood branches of the snake family tree.

General (top) and ventral (below) views of the holotype of Indotyphlops gyirongensis sp. nov. in life (by Peng Guo).

Blind snakes are small, burrowing reptiles that spend nearly their entire lives underground. Their secretive habits and similar appearances make them notoriously difficult to study.

The family Typhlopidae contains roughly 280 species, yet its relationships remain poorly resolved, and new species continue to surface wherever researchers look carefully. Until now, no blind snake had ever been recorded in the Xizang Autonomous Region, which makes this find a first for the area.

The single specimen, an adult female, was collected in August 2025 at an elevation of 2,262 metres, close to the border between China and Nepal. She was resting beneath a stone at the edge of an evergreen broad-leaved forest, where deep humus and a thick layer of fallen leaves create ideal conditions for a creature that lives by burrowing. Among her neighbours were a Himalayan pit viper and a Himalayan toad!

Microhabitat of the type specimen of Indotyphlops gyirongensis sp. nov. in Gyirong, Xizang, China (by Peng Guo).

The snake itself is slender and elegant. At 265 millimetres, it is large by the standards of its genus, yet it measures just 3.5 millimetres across at midbody. Its glossy scales are light brown, each one darker on its rear half, which gives the body a delicate and finely patterned sheen. The underside is cream and so thin-skinned that it is partly transparent to the internal organs.

Most distinctive is its pale cream head cap, which lacks pigment as far back as the eye. The eye itself is only a dark spot, with no visible pupil or iris, fitting for an animal that navigates by touch and chemical cues rather than sight. Its tail ends in a small nubbin rather than a sharp spine.

Some of the most telling differences are hidden in the arrangement of the scales along the lip. Blind snakes are classified partly by how their upper lip scales overlap the shields above them. In nearly all of the snake’s relatives, the third scale overlaps the one beside the eye, a pattern known as T-III.

The Gyirong blind snake shows a rarer arrangement, called T-V, in which both the second and third lip scales overlap the shields above. Few documented members of its genus share this feature, which provides a clean and reliable way to separate it from most of its kin.

Anatomy alone did not settle the matter. The team sequenced two mitochondrial genes and placed the snake within a broad evolutionary tree. It nested firmly within Indotyphlops, as the sister lineage to I. albiceps, but its genetic divergence was substantial. For one gene, it differed from its closest relatives with available data by more than 24 per cent, and for another by more than 18 per cent, margins far beyond what is typically seen within a single species.

The name honours the place of discovery. Gyirongensis refers to Gyirong Town in Gyirong County, where the holotype was found, and it is formed as a noun in apposition. The authors propose the English common name “Gyirong blind snake” and the Chinese name 吉隆盲蛇 (Jílóng Mángshé).

Map showing the locality of the new species in Gyirong, Xizang, China.

Because the type locality sits so close to the Nepalese border, the researchers consider it highly likely that the species also lives on the other side, thus pending further fieldwork.

Original source:

Lyu B, Tan S, Zhao Z, Wallach V, Liu Q, Guo P (2026) A new species of blind snake, Indotyphlops (Serpentes, Typhlopidae), from the Qinghai-Xizang Plateau, China. ZooKeys 1292: 261-273. https://doi.org/10.3897/zookeys.1292.197322

For more articles on zoology, visit the ZooKeys website and follow the journal on BlueSky and Facebook.

High-schoolers join scholars to lift the lid on Hong Kong’s soil biodiversity

Most often, the students would find millipedes. They even helped identify two species that are new to Hong Kong’s fauna.

Soil and its macrofauna are an integral part of many ecosystems, playing an important role in decomposition and nutrient recycling. However, soil biodiversity remains understudied globally.

To help fill this gap and reveal the diversity of soil fauna in Hong Kong, a team of scientists from The Chinese University of Hong Kong initiated a citizen science project involving universities, non-governmental organisations and secondary school students and teachers.

“Involving citizens as part of the new knowledge generation process is important in promoting the understanding of biodiversity. Training younger-generation citizens to learn about biodiversity is of utmost importance and crucial to conservation engagement”

– say the researchers in their study, which was published in the open-access Biodiversity Data Journal.

The soil sampling methodology that the students employed in this study.
Video by Sheung Yee Lai, Ka Wai Ting, Tze Kiu Chong and Wai Lok So.

Working side by side with university academics, taxonomists and non-governmental organisation members, students from 21 schools/institutes were recruited to collect soil animals near their campusesfor a year and record their observations.

Between October 2019 and October 2020, they monitored and sampled species across 21 sites of urban and semi-natural habitats in Hong Kong, collecting a total of 3,588 individual samples. Their efforts yielded 150 soil macrofaunal species, identified as arthropods (including insects, spiders, centipedes and millipedes), worms, and snails.

Most often, the students found millipedes (23 out of 150 species). They even helped identify two millipede species that are new to Hong Kong’s fauna: Monographis queenslandica and Alloproctoides remyi. The former is usually found in Australia – the researchers suggest it might have been introduced to the area many decades ago from Queensland or vice versa – and the latter has been observed in Reunion and Mauritius.

Two polyxenid millipede species, collected in this study, turned out to had never before been recorded from Hong Kong.
Left: Monographis queenslandica and Alloproctoides remyi (right).
Image by Sheung Yee Lai, Ka Wai Ting and Wai Lok So.

Millipedes like these two species can accelerate litter decomposition and regulate the soil carbon and phosphorus cycling, while earthworms can modify the soil structure and regulate water and organic matter cycling.

“Before the beginning of this project, the understanding of soil biodiversity in Hong Kong, including the understanding of its contained millipede species, was inadequate”

the researchers write in their paper.

Now, they believe that the identified macrofauna species and their 646 DNA barcodes have established a solid foundation for further research in soil biodiversity in the area.

Their project also serves an additional purpose. Unlike most conventional scientific studies, which are usually carried out by the government, non-governmental organisations or academics in universities alone, this study utilised a citizen science approach through creating a big community engaged with biodiversity. In doing so, it helped educate the public and raise awareness on the use of basic science techniques in understanding local biodiversity.

So, it may have inspired a new generation of future scientists: some students started millipede cultures in their own schools, and one school used the millipede breeding model to participate in a science and technology competition.

This study is a proof that local institutes and high schools can unite together with research teams at universities and perform scientific work, the study’s authors believe.

It “has raised public awareness and potentially opens up opportunities for the general public to engage in scientific research in the future.” 

The team hopes that their approach could inspire future biodiversity sampling and monitoring studies to engage more citizen scientists.

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Research article:

So WL, Ting KW, Lai SY, Huang EYY, Ma Y, Chong TK, Yip HY, Lee HT, Cheung BCT, Chan MK, Consortium HKSB, Nong W, Law MMS, Lai DYF, Hui JHL (2022) Revealing the millipede and other soil-macrofaunal biodiversity in Hong Kong using a citizen science approach. Biodiversity Data Journal 10: e82518. https://doi.org/10.3897/BDJ.10.e82518

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