A review of the catfish genus Pterocryptis (Siluridae) in Vietnam, with the description of two new species

Abstract

Of the silurid catfish genus Pterocryptis in Vietnam, a total of four species are recognized as valid, of which Pterocryptis crenula and P. verecunda are described here as new. The type locality of P. cochinchinensis is restricted to central Vietnam, and the species is redescribed from topotypic material. Pterocryptis crenula (from northeastern Vietnam) can be differentiated from its congeners in having visibly confluent anal and caudal fins while P. verecunda (from Cat Ba Island in northeastern Vietnam) can be differentiated from its congeners in having the genital papilla concealed behind the anus. Notes on the identity of other nominal Pterocryptis species are also provided. 2001 The Fisheries Society of the British Isles

The complete mitochondrial genome of the catfish Silurus cochinchinensis (Siluriformes: Siluridae)

“…The mitochondrial genome of S. cochinchinensis was 16,501 bp in length and has been deposited in Genbank with accession number MH202954. The structural organization and gene order of the mtDNA was identical to other typical bony fishes, which contains the following: 13 protein-coding genes, 2 ribosomal RNAs, 22 transfer RNAs, and one control region (Ng and Freyhof 2001;Xu et al 2015). In the overall, base composition of the S. cochinchinensis mtDNA genome was estimated to be 31.53% A, 14.68% G, 25.43% T, and 28.36% C, with a slight A þ T bias (56.96%).…”

Revalidation and redescription of Pterocryptis anomala (Herre, 1933), a catfish (Teleostei: Siluridae) from southern China

“…Kobayakawa (1989) did not mention this species; Bornbusch (1991) noted this omission but did not further discuss the status of P. anomala. Most recently, Ng & Freyhof (2001) tentatively considered P. anomala a junior synonym of P. cochinchinensis following Haig (1952) and Chen (1977). Our examination of material from Hong Kong and southern China shows that P. anomala is not conspecific with P. cochinchinensis and is a distinct species.…”

“…Pterocryptis had been considered a junior synonym of Silurus Linnaeus, 1758, until its rediagnosis by Bornbusch (1991). There are 16 nominal species of Pterocryptis (see Ng & Freyhof, 2001). Of these, only P. cochinchinensis (Valenciennes, 1839), P. anomala (Herre, 1933) and P. gilberti (Hora, 1938) have been reported from China.…”

“…Of these, only P. cochinchinensis (Valenciennes, 1839), P. anomala (Herre, 1933) and P. gilberti (Hora, 1938) have been reported from China. Recent work by Ng & Freyhof (2001) suggests that P. cochinchinensis is restricted to central Vietnam. This prompted us to examine Pterocryptis from southern China with the objective of clarifying its taxonomic status.…”

Redescription of siluroid Catfish Pterocryptis barakensis Vishwanath & Nebeshwar (Siluriformes: Siluridae)

“…Arunkumar & Tombi (1997) described Silurus morehensis from Chindwin drainage basin in Manipur. Ng & Freyhof (2001) considered the species to be a junior synonym of P. berdmorei and reported 16 nominal species under the genus.…”