Acrochordonichthys falcifer

Acrochordonichthys falcifer is a species of catfish of the family Akysidae. It' is known only from the Kinabatangan and Segama River drainages, and possibly from the Kayan River drainage, in north-eastern Borneo.[1] A. falcifer falls into the second species group of its genus—the A. rugosus section. It includes A. falcifer, A. chamaeleon, A. pachyderma, and A. rugosus.[2]

Acrochordonichthys falcifer
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Siluriformes
Family: Akysidae
Genus: Acrochordonichthys
Species:
A. falcifer
Binomial name
Acrochordonichthys falcifer
Ng & Ng, 2001

Description

A. falcifer can be differentiated from other members of the species group by an adipose fin with a rounded (vs. angular) posterior margin and a longer dorsal-fin base (10.8–13.1% standard length vs. 7.9–10.5); generally the colour pattern of A. falcifer is also different in having many small blotches (vs. few large blotches) of various shades of brown, with many small dark brown spots (vs. no spots) on the dorsal surfaces of the head. Both A. falcifer and A. pachyderma lack serrations on the pectoral spine, but the two species can be separated based on their colouration (cream with numerous small blotches of various shades of brown in A. falcifer vs. overall cream in A. pachyderma) and the shape of the posterior margin of the adipose fin.[2]

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References
  1. Froese, Rainer and Pauly, Daniel, eds. (2013). "Acrochordonichthys falcifer" in FishBase. April 2013 version.
  2. Ng, H. H.; Ng, P. K. L. (2001). "A revision of the akysid catfish genus Acrochordonichthys Bleeker". Journal of Fish Biology 58 (2): 386–418.


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