5.FRESHWATER FISHES OF NORTHERN VIETNAM

Maurice Kottelat

June 2001

Freshwater Fishes of Northern Vietnam 53

Cranoglanis henrici: Ng & Kottelat, 2000b: 848 Silurus asotus Linnaeus, 1758 (Fig. 110) Remarks. Redescribed in Ng & Kottelat (2000b: 848). Cranoglanis henrici is endemic to the Hong River basin. Silurus asotus: Pellegrin, 1907: 499 (Hanoi) Parasifurus asotus: Pellegrin, 1934: 336 (Hanoi) Parasiiurus asotus: Chevey & Lemasson, 193 7: 10 1 Parasilurus asotus: Mai, 1978: 242 Family SILURIDAE Silurus asotus: Chu & Cui, in Chu & Chen, 1990: 115 (Yunnan: Hekou and Wenshan) Parasilurus azotus: Nguyen, Nguyen & Le, 1999: 27 Pterocryptis cochinchinensis (Vaienciennes, 1840) (Vu Quaw) (Fig. 109) Remarks. Redescribed by Kobayakawa (1989: 158). Parasilurus cochinchinerzsis: Mai, 1978: 243 Parasilurus cochinchinensis: Nguyen, Nguyen & Le, 1999: 27 (Vu Quang) Pterocryptis cochinchinensis: Kottelat, 2001 (Laos: Nam Family PANGASIIDAE Xam)

Remarks. Redescribed by Kobayakawa (1989: 162; as Pangasius krempfl Fang & Chaux, 1949 Silurus cochinchinensis). Placed in Pterocryptis by Bombusch (1991). See also Ng (1999: 373). Remarks. There is no record yet of this species from northern Vietnam, but it is expected to enter (at least occasionally) some of the main rivers. The species is Pteroclyptis cucphuongensis (Mai, 1978) known along the coasts of southern Vietnam and Guangdong Province () and in freshwaters from Silurus cucphuongensis Mai, 1978: 245 (Cut Phuong) the lower Mekong (Roberts & Vidthayanon, 199 1: 124). As noted by Rainboth (1996b: 155), differences Remarks. Placed in Pterocryptis by Ng & Kottelat between the published descriptions of this species (1998: 393) and Ng (1999: 373). suggest that two species might be involved.

? Pterocryptis gilberti (Hors, 1938) Family Silurus wynaadensis: Mai, 1978: 244 (Ky Phu, Dai Tu, Bat Thai) sp. Remarks. Silurus wyzaademis is a species known only from southern . It was recorded from southern Liobagrus nigricauda: Mai, 1978: 248 China by Tchang (1936: 35). Hora (1937: 341) noted that the Chinese species differs from the Indian one and Remarks. The species reported by Mai (1978: 248) as named it S. sinerzsis. As this name was already used for Liobagrus nigricauda is probably misidentified as this another fish species, Hora (1938) renamed it S. gilberti. species is endemic to the Yang&e basin according to He Redescribed by Kobayakawa (1989: 163; as Silurus (in Chu et al., 1999: 106) who records two species in gilbertz). Placed in Pteroczyptis by Bombusch (1991). adjacent areas: L. anguillicauda in “Southeastern The few characters available from Mai’s (1978: China” and L. xiuenensis in Pearl River basin (now 244) record of this species from Vietnam do not agree placed in Xiurenbagrus, see Chen & Lunberg, with the diagnostic characters used in Kobayakawa’s 1995). key and the identity of this material needs to be checked. According to Mai, the lower jaw projects forwards beyond the upper jaw and there are 53-59 anal-fin rays. According to Kobayakawa, in P. gilberti the upper jaw projects and there are 57-66 anal-fin rays. Dai (in Chu et al., 1999: 79) records 55-6 1 anal-fm rays and Chen (1977: 201) 58-61.