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Species of fish From Wikipedia, the free encyclopedia
Macrognathus pentophthalmos, the Sri Lanka five-eyed spiny eel, is a small species of spiny eel that is endemic to freshwater habitats in Sri Lanka. Described as a common species as recently as 1980, for unknown reasons its population rapidly declined in the following years and there are no recent confirmed records.[3] In 2012, it was listed as "Critically Endangered, possibly Extinct" in the Sri Lankan National Red List,[4] which was matched by IUCN in 2019.[1]
Macrognathus pentophthalmos | |
---|---|
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Actinopterygii |
Order: | Synbranchiformes |
Family: | Mastacembelidae |
Genus: | Macrognathus |
Species: | M. pentophthalmos |
Binomial name | |
Macrognathus pentophthalmos (Gronow, 1854) | |
Synonyms[2] | |
Mastacembelus pentophthalmos Gronow, 1854 |
It is up to 19.5 cm (7.7 in) in standard length.[5] Compared to Mastacembelus armatus, the only other spiny eel in Sri Lanka, M. pentophthalmos has a striped/plain (not mottled) pattern, and clearly separated dorsal, caudal and anal fins.[3] The English name of M. pentophthalmos refers to the series of dark spots on its dorsal fin.[3]
Described as a new species in 1854, it was then considered a synonym of the widespread M. aral. In 2008 it was shown that this was mistaken and M. pentophthalmos was reinstated as a valid species (the true M. aral is not found in Sri Lanka).[3]
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