''Ichthyophis biangularis'', the angular caecilian or Metang caecilian, is a species of

amphibian Amphibians are ectothermic, anamniote, anamniotic, tetrapod, four-limbed vertebrate animals that constitute the class (biology), class Amphibia. In its broadest sense, it is a paraphyletic group encompassing all Tetrapod, tetrapods, but excl ...

in the family

Ichthyophiidae The Ichthyophiidae are the family of Asiatic tailed caecilians or fish caecilians found in South and Southeast Asia as well as southernmost China. They are primitive caecilians, lacking many of the derived characters found in the other families ...

endemic Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also foun ...

Borneo Borneo () is the List of islands by area, third-largest island in the world, with an area of , and population of 23,053,723 (2020 national censuses). Situated at the geographic centre of Maritime Southeast Asia, it is one of the Greater Sunda ...

(

Malaysia Malaysia is a country in Southeast Asia. Featuring the Tanjung Piai, southernmost point of continental Eurasia, it is a federation, federal constitutional monarchy consisting of States and federal territories of Malaysia, 13 states and thre ...

): it is only known from its type locality, Mount Matang in

Sarawak Sarawak ( , ) is a States and federal territories of Malaysia, state of Malaysia. It is the largest among the 13 states, with an area almost equal to that of Peninsular Malaysia. Sarawak is located in East Malaysia in northwest Borneo, and is ...

, where the

holotype A holotype (Latin: ''holotypus'') is a single physical example (or illustration) of an organism used when the species (or lower-ranked taxon) was formally described. It is either the single such physical example (or illustration) or one of s ...

was collected in 1872 by Alfred Hart Everett. New specimens were collected from the type locality only in 2009. In addition, one larval sample was collected from the same region and identified as likely ''Ichthyophis biangularis'' using genetic methods.

Description

The

of ''Ichthyophis biangularis'' measures in total length, including long tail. The body is wide and blackish slate above and below with a yellow lateral line. The eye is dimly distinct, with a slightly lighter ring about it.

Habitat

This is a little known species. It is presumed to inhabit tropical moist forests.

References

{{Taxonbar, from=Q1934727 biangularis Amphibians described in 1965 Amphibians of Malaysia Endemic fauna of Malaysia Endemic fauna of Borneo Taxonomy articles created by Polbot Amphibians of Borneo