A revision of the South‐east Asian catfish genus Silurichthys

Abstract

The taxonomy of the catfish genus Silurichthys is revised, and eight species are now recognized. A neotype is designated for S. hasseltii. Two new species are described: S. gibbiceps from the Barito basin in southern Borneo and S. marmoratus from north-western Borneo. Silurichthys leucopodus Fowler, 1939, is considered a subjective junior synonym of S. schneideri Volz, 1904. The extent of the gape and the relative positions of the dorsal and pelvic fins show considerable infraspecific variation and are of little taxonomic value. The number of anal-fin rays is useful if used with other meristic data such as the number of vertebrae. Colour varies infraspecifically as individuals become paler and less mottled at night, but can still be used as a secondary character in separating some species. The head and caudal fin shapes are useful discriminating characters. Mature males are smaller than females and have prominent posterior serrae on the pectoral spine and articulated segments of the first pectoral-fin element. The shape and number of these serrae are also diagnostic for some species. 1998 The Fisheries Society of the British Isles

Kryptopterus geminus, a new species of silurid catfish (Teleostei: Siluridae) from mainland Southeast Asia

“…Kryptopterus geminus and K. cryptopterus also do not show any marked sexual dimorphism in the pectoral-fin spine as reported for most other silurid genera (e.g. Inger & Chin, 1962;Bornbusch & Lundberg, 1989;Ng & Ng, 1998). The two species are further distinguished from congeners in lacking a nuchal concavity (present in all other Kryptopterus) and short maxillary barbels (reaching to base of pectoral fin vs. reaching at least to the origin of the anal fin in congeners).…”

Fishes of Inland Waters of the Phu Quoc Island, Gulf of Thailand, Vietnam: Ichthyofauna Structure and Some Remarks on the Majorevolutionary Trends in its Genesis

“…Distribution: Freshwater; Asia-Malaysia, Singapore and Indonesia; known from the Mekong basin (Ng and Ng 1998); Phu Quoc: the majority of the studied freshwater sites in the northern and central parts of the island (# 2, 5, 6, 9, 11, 12, 15, 17, 21, 30).…”

Comparative chromosomal mapping of microsatellite repeats reveals divergent patterns of accumulation in 12 Siluridae (Teleostei: Siluriformes) species

“…The freshwater family Siluridae ranges in Eurasia, but containing the higher number of species in South and Southeast Asia (Bornbusch, 1995;Kottelat, 2013), with 103 recognized species (Fricke et al, 2019), thus representing important aquaculture and fishery targets. Silurid species show a significant size diversity, such as Silurus glanis, reaching over 300 kg in weight and 2m in size (Linhart et al, 2002) and Silurus soldatovi, that reaches 400 kg in weight and up to 4m in size (Berg, 1964), while others are much smaller, being used as ornamental fishes (Ng et al, 1994;Chapman et al, 1997;Ng and Ng, 1998;) or biological indicators (Ng and Lim, 1992;Ng and Ng, 1998). The monophyletic status of Siluridae is supported and confirmed by both morphological and molecular data (Bornbusch, 1995;Hardman, 2005), and, altough their phylogenetic position was doubtful for many years (Bornbusch, 1995;Hardman, 2005;Sullivan et al, 2006), a recentl study placed this family in the root of taxon Siluroidea (Kappas et al, 2016).…”

“…Silurid species show a significant size diversity, such as Silurus glanis , reaching over 300 kg in weight and 2m in size ( Linhart et al , 2002 ) and Silurus soldatovi , that reaches 400 kg in weight and up to 4m in size ( Berg, 1964 ), while others are much smaller, being used as ornamental fishes ( Ng et al , 1994 ; Chapman et al. , 1997 ; Ng and Ng, 1998 ;) or biological indicators ( Ng and Lim, 1992 ; Ng and Ng, 1998 ). The monophyletic status of Siluridae is supported and confirmed by both morphological and molecular data ( Bornbusch, 1995 ; Hardman, 2005 ), and, altough their phylogenetic position was doubtful for many years ( Bornbusch, 1995 ; Hardman, 2005 ; Sullivan et al.…”