Parakysis
Parakysis is a genus of catfishes of the family Akysidae. It includes six species.
Distribution
Parakysis species are found in small forest streams of Sundaic Southeast Asia. P. anomalopteryx originates from the Kapuas River basin in western Borneo. P. grandis inhabits the Kapuas and Kuching River basins in Borneo and Deli, Indragiri, and Batang Hari basins in Sumatra. P. longirostris is distributed in Singapore, peninsular Malaysia, and the Riau Archipelago. P. verrucosus is known from Peninsular Malaysia and the Riau Archipelago. The discovery of P. notialis in 2003 expanded the known range of Parakysis species to the Barito River basin in southern Borneo.
Description
They are cryptically colored fishes that have a highly rugose skin with tubercles all over the body, branched mandibular barbels, a long, low adipose ridge, and a forked caudal fin. Parakysis species characteristically have pigmented tubercles and lateral lobes of the lower lip. They are also distinguished from Akysis by well-developed barbels, absence of teeth on the palatine, non-serrated pectoral and dorsal spines, and the apparent absent of the lateral line. They range in size from 2.0-6.2 centimetres SL.
Ecology
P. anomalopteryx is found in small forest streams. P. longirostris is nocturnal and occurs in clumps of vegetation in streams with flowing waters. It is sympatric with P. verrucosus. ''P. verrucosus'' is found in primary peat streams with dense litter falls.
Species
Parakysis anomalopteryx Roberts, 1989Parakysis grandis Ng & Lim, 1995Parakysis hystriculus Ng, 2009Parakysis longirostris Ng & Lim, 1995 Parakysis notialis Ng & Kottelat, 2003Parakysis verrucosus Herre, 1940