Glyptothorax scrobiculus, a new species of sisorid catfish (Osteichthyes: Siluriformes) from northeastern India (original) (raw)
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Records of the Zoological Survey of India, 2020
A new sisorid catfish, Glyptothorax distichus , is described from the Barak-Meghna-Surma drainage in Mizoram, North-east India. It is distinguished from its congeners in having a combination of the following characters: a chevron-shaped thoracic adhesive apparatus, with poorly developed median depression that is widely opened posteriorly by skin ridges; short dorsal fin spine; short and slender caudal peduncle; unculiferous ridges of adhesive apparatus not extending anteriorly onto gular region; absence of plicate on ventral surfaces first pectoral and pelvic fins rays, smooth skin on head and body; presence of two broad pale cream longitudinal stripes on body; and 20 + 17 Vertebrae.
Ichthyological Research, 2011
Glyptothorax dikrongensis, a new species of sisorid catfish from the Dikrong River in northeastern India, is described. Glyptothorax dikrongensis can be differentiated from all congeners, except G. indicus, G. rugimentum and G. obliquimaculatus, by the presence of an unculiferous patch on the posterior region of the lower lip, in between the inner mandibular-barbel bases, and unculiferous striae of the thoracic adhesive apparatus extending anteriorly onto the gular region. Glyptothorax dikrongensis is distinguished from G. indicus by the following combination of characters: equal distance between the posterior end of the pectoral-fin base and the pelvic-fin origin and between the pelvic-fin and the anal-fin origin (vs. distance between posterior end of pectoral-fin base and pelvic-fin origin greater than between pelvic-fin origin and anal-fin origin), and the pelvic-fin origin anterior to or almost at a vertical through the posterior end of the dorsal-fin base (vs. posterior to the dorsal-fin base). Glyptothorax dikrongensis is distinguished from G. rugimentum in lacking vertical bars on the body and caudal peduncle, and having a deeper caudal peduncle (8.4–9.2 vs. 6.1–7.6% SL) and a shorter dorsal-fin spine (10.1–11.1 vs. 15.2–18.6% SL). It is distinguished from G. obliquimaculatus in lacking dark, oblique blotches on the body, and in having a shorter dorsal-fin spine (10.1–11.1 vs. 13.4–16.4% SL).
Glyptothorax elankadensis is described as a new sisorid species of the genus Glyptothorax, from Manimala River, Kerala, India. It is characterized as follows: Osseous serrated principal ray of dorsal and pectoral fins, with four pairs of barbels, all fins yellow tipped. Three narrow yellow bands – one mid dorsal and others mid lateral- present on longitudinal axis of body. Two small yellowish round spots on dorsal side downwards and backwards from dorsal fin origin. Median fontanel on the dorsal side of the head very faint and indistinct. Occipital process does not reach basal bone of dorsal fin. Meristic, metric and other morphological features of G. elankadensis described and compared with its relatives.
Zoological Journal of the Linnean Society, 2012
This study re-examined the taxonomic status of the sisorid catfishes usually identified as Glyptothorax zanaensis using a combination of morphometric and molecular data. Our results resurrect Glyptothorax longinema from the synonymy of G. zanaensis, and we describe two previously unnamed species as Glyptothorax granosus sp. nov. and Glyptothorax fucatus sp. nov. All four species are diagnosed and described in detail. Truss-based morphometrics combined with principal component analysis (PCA) detected three principal components (PCs) that can explain 86% of the total variation amongst species, which mainly reflect the characteristics of body depth, related depth, adhesive apparatus length, pectoral-fin length, caudal peduncle length, and barbel lengths. We also generated a phylogenetic hypothesis of these species using concatenated mitochondrial cytochrome b and D-loop gene sequences. Molecular dating analysis revealed a rapid speciation of Glyptothorax in the south-eastern corner of the Qinghai-Xizang Plateau from the middle Pliocene to early Pleistocene. A key to identify the Glyptothorax species from the Salween River drainage is also provided.
Glyptothorax rugimentum, a new species of sisorid catfish from the Ataran, Salween and Sittang River drainages in Myanmar and western Thailand is described here. It can be distinguished from all congeners in having a unique combination of the following characters: unculiferous ridges of thoracic adhesive apparatus extending anteriorly onto gular region, thoracic adhesive apparatus in rhomboidal, somewhat U-shaped field, head width 19.1-22.6% SL, eye diameter 8.4-11.6% HL, nasal barbels not reaching anterior orbital margin (length 24.5-37.1% HL), pelvic-fin origin at vertical through base of last dorsal-fin ray, steeply-sloping posterior margin of adipose fin, and presence of light and dark vertical bands on the caudal peduncle. Glyptothorax burmanicus is revalidated from synonymy with G. cavia and the use of thoracic adhesive apparatus morphology as a diagnostic character for species of Glyptothorax is briefly discussed.
Catfishes of the genus Glyptothorax Blyth (Pisces: Sisoridae) from Pakistan
Sisorid catfish genus Glyptothorax Blyth is represented in Pakistan by six species, viz., Glyptothorax sufii Bashir & Mirza, Glyptothorax cavia (Hamilton), Glyptothorax pectinopterus (McClelland), Glyptothorax stocki Mirza & Nijssen, Glyptothorax kashmirensis Hora, Glyptothorax punjabensis Mirza & Kashmiri. These are recorded from different foot hill streams and adjoining plains. After detailed analysis G. naziri is found to be a synonym of G. kashmirensis Hora; G. telchitta sufii Bashir and Mirza has been validated as full species G. sufii. Presently recognized species are easily identifiable on the basis of general body shape, sucker shape, length of barbels, fin structure, number of serrations on dorsal and pectoral spines and number of gill rakers.
Acta Biologica Sibirica, 2021
Glyptothorax telchitta (Hamilton-Buchanan, 1822) is a benthic hill-stream Sisoroid catfish that inhabits the mountain waters of the Indian Himalayas and in China, Tibet and the Sunda Islands. It is also a common hill stream catfish of the northern region of West Bengal. The present work reveals that the species is available in the Shilabati river basin, Ghatal, Paschim Medinipur, West Bengal. Therefore, Glyptothorax telchitta (Hamilton-Buchanan, 1822) is a widely distributed hill stream species and extends to the lowland area of Paschim Medinipur district of West Bengal, India.
Ichthyological Research, 2014
A new glyptosternine catfish, Creteuchiloglanis arunachalensis is described on the basis of a single specimen collected from the upper Brahmaputra River drainage, northeastern India. The new species is distinguished from its congeners by the following characters: shorter adipose-fin base (25.9 vs. 26.2-37.3 % standard length; SL) except C. longipectoralis; shorter maxillary barbel (71.2 vs. 75.2-99.8 % head length) except C. macropterus; and longer prepelvic (45.4 vs. 36.4-44.9 % SL) except C. brachypterus. It can be further differentiated by a combination of the following characters: pectoral fin not reaching pelvic-fin origin; pelvic fin not reaching at vertical through adipose-fin origin; pale patches on body except occipital region; absence of milky-white patch on the base of posterior end of maxillary barbel; longer post adipose distance (10.1 % SL); tip of rectal lobe obtusely rounded; caudal-fin lobes equal; posterior margin of caudal fin slightly convex; adipose-fin separate from caudal fin; and caudal fin with broad bean-shaped medial band. Keywords Creteuchiloglanis Á Glyptosterninae Á Pange River Á Brahmaputra basin Á Arunachal Pradesh This article was registered in the Official Register of Zoological Nomenclature (ZooBank) as 87FAA114-87FF-450B-B453-E3469DE9FD02. This article was published as an Online First article on the online publication date shown on this page. The article should be cited by using the doi number.
Zootaxa, 2012
Glyptothorax lanceatus, a new species of sisorid catfish from the upper Salween River drainage in southwestern China, is described. It can be distinguished from congeners in having the following combination of characters: length of nasal barbel 18.1-21.5% HL; length of maxillary barbel 86.2-91.1% HL; length of inner mandibular barbel 23.8-28.2% HL; length of outer mandibular barbel 42.8-49.1% HL; eye diameter 6.8-8.3% HL; interorbital distance 20.2-22.1% HL; elongate, ovoid tubercles on dorsal surface of head; head length 23.0-25.1% SL; head width 16.3-18.8% SL; width of adhesive apparatus 1.60-1.74 times in its length; depressed area in thoracic adhesive apparatus not wholly enclosed by ridges; ridges of thoracic adhesive apparatus not extending onto gular region;10-13 serrations on posterior edge of pectoral spine; pectoral-fin length 21.1-24.5% SL; length of adipose-fin base 12.2-13.2% SL; dorsal-to-adipose distance 23.0-24.8% SL; distally expanded neural spines in vertebrae between dorsal and adipose fins; body depth at anus 12.4-14.8% SL; post-adipose distance 18.7-20.3% SL; caudal-peduncle length 20.3-21.8% SL; caudal-peduncle depth 6.7-7.4% SL;40-41 vertebrae; reaching to at least ca. 170 mm TL in size; and uniformly dark-colored body generally devoid of pale or dark markings.