Two new species of Glyptothorax (Teleostei: Sisoridae) from central Vietnam

Zootaxa ◽  
2008 ◽  
Vol 1873 (1) ◽  
pp. 11 ◽  
Author(s):  
HEOK HEE NG ◽  
JÖRG FREYHOF
Keyword(s):  
New Species ◽  
Head Width ◽  
Caudal Peduncle ◽  
Body Depth ◽  
Central Vietnam ◽  
Two New Species ◽  
Pectoral Spine ◽  
Eye Diameter ◽  
Adipose Fin ◽  
Brown Body

Two new species of Glyptothorax are described from the rivers draining the Annam Cordilleras in central Vietnam. Glyptothorax filicatus n. sp. is distinguished from congeners in Indochina in having a diverging pattern of striae running along the edges of the central depression in the thoracic adhesive apparatus, and a combination of the following characters: dorsal spine length 13.7–15.1% SL, pectoral fin length 21.5–21.9% SL, length of adipose-fin base 13.3–15.0% SL, depth of caudal peduncle 8.4–8.8% SL, body depth at anus 15.1–16.0% SL, snout length 48.0–52.9% HL, eye diameter 8.9– 9.9% HL, anterior nuchal plate strongly demarcated in beige and caudal peduncle with a pale vertical band. Glyptothorax strabonis n. sp. is distinguished from congeners in Indochina in having a very small eye (6.2–6.5% HL), and a combination of the following characters: length of caudal peduncle 20.5–21.2% SL, depth of caudal peduncle 7.5–9.2% SL, body depth at anus 13.7–20.9% SL, head width 17.9–18.8% SL, presence of 14–16 serrae on posterior margin of pectoral spine, and coloration consisting of a dark-brown body with indistinct pale mid-lateral and mid-dorsal stripes.

Pseudobagarius eustictus, a new species of catfish from northern Laos (Siluriformes: Akysidae)

Zootaxa ◽  
2021 ◽  
Vol 4996 (2) ◽  
pp. 322-330
Author(s):  
HEOK HEE NG ◽  
MAURICE KOTTELAT
Keyword(s):  
New Species ◽  
The Body ◽  
Head Width ◽  
Caudal Peduncle ◽  
Body Depth ◽  
Lower Jaw ◽  
Pectoral Spine ◽  
Eye Diameter ◽  
Adipose Fin ◽  
A New Species

Pseudobagarius eustictus, new species, is described from the Nam Heung drainage (a tributary of the Mekong River) in northern Laos. It is distinguished from congeners in having a unique combination of the following characters: a weakly-produced snout in which the upper jaw extends only slightly beyond the margin of the lower jaw when viewed ventrally, 3 tubercles on the posterior margin of the pectoral spine, eye diameter 8% HL, head width 24.1% SL, dark yellow dorsal and lateral surfaces of the head, pectoral spine lacking elongate extensions, pectoral fin reaching the pelvic-fin base when adpressed against the body, dorsolateral surfaces of body without longitudinal series of prominent tubercles, body depth at anus 13.7% SL, length of adipose-fin base 17.7% SL, caudal-peduncle depth 7.0% SL, and 33 vertebrae.  

Description of Bagarius vegrandis, a new species of sisorid catfish from Indochina (Actinopterygii: Siluriformes), with notes on the identity of Bagarius bagarius

Zootaxa ◽  
2021 ◽  
Vol 4926 (1) ◽  
pp. 134-146
Author(s):  
HEOK HEE NG ◽  
MAURICE KOTTELAT
Keyword(s):  
New Species ◽  
Indian Subcontinent ◽  
Dorsal Surface ◽  
Valid Species ◽  
Head Width ◽  
Caudal Peduncle ◽  
Body Depth ◽  
Eye Diameter ◽  
Adipose Fin ◽  
Peduncle Length

Bagarius vegrandis, new species, is described from the Chao Phraya and Mekong river drainages. It differs from congeners in having a small maximum body size (to 220 mm SL vs. 520–1400 mm SL) and the adipose-fin origin markedly posterior to (vs. at vertical through or very slightly posterior to) the anal-fin origin. It further differs from congeners in having the following unique combination of characters: ovoid unculiferous plaques on dorsal surface of head, lateral margin of frontal not significantly deflected dorsally, eye diameter 11–15% HL, interorbital distance 23–28% HL, head width 18.3–22.3% SL, head depth 11.1–14.1% SL, filamentous extensions to first pectoral-fin element reaching to anus, dorsal spine width 10.6–13.9 times in its length, body depth at anus 8.7–12.0% SL, neural spines of the 4–6 vertebrae immediately anterior to adipose fin distally flattened but not forming series of prominent bumps along dorsal midline, length of adipose-fin base 10.8–13.0% SL, caudal-peduncle length 19.0–22.4% SL, caudal-peduncle depth 3.2–4.2% SL, 19–20 preanal vertebrae, and 39–40 total vertebrae. Bagarius bagarius (Hamilton, 1822) is demonstrated to be a species restricted to the Indian subcontinent (with Bagrus yarrelli Sykes, 1839, Pimelodus platespogon Valenciennes, in Jacquemont, 1839 and Pimelodus carnaticus Jerdon, 1849 as junior subjective synonyms) and Bagarius lica Volz, 1903 resurrected from synonymy with B. yarrelli as a valid species from Southeast Asia. 

Pseudolaguvia viriosa, a new catfish (Teleostei: Sisoridae) from north-eastern India

Zootaxa ◽  
2012 ◽  
Vol 3522 (1) ◽  
pp. 81 ◽  
Author(s):  
HEOK HEE NG ◽  
LAKPA TAMANG
Keyword(s):  
Dorsal Spine ◽  
Head Width ◽  
Caudal Peduncle ◽  
Body Depth ◽  
Spine Length ◽  
North Eastern ◽  
Pectoral Spine ◽  
Eye Diameter ◽  
Adipose Fin ◽  
Peduncle Length

This study describes Pseudolaguvia viriosa, a new miniature sisorid catfish from the Brahmaputra River drainage in Ar-unachal Pradesh, northeastern India. Pseudolaguvia viriosa can be distinguished from congeners in having a combinationof: eye diameter 10–15% HL, interorbital distance 35–38% HL, head width 21.5–23.5% SL, thoracic adhesive apparatusreaching beyond base of last pectoral-fin ray, pectoral spine length 26.9–32.9% SL, dorsal spine length 23.4–29.0% SL,dorsal spine with anterior edge smooth or with rugose surface only on distal third of spine, body depth at anus 16.9–19.0%SL, length of adipose-fin base 12.5–15.4% SL, caudal peduncle length 14.8–17.7% SL, caudal peduncle depth 7.4–9.8% SL, caudal-fin length 26.5–32.4% SL, 28–29 vertebrae, and one or more distinct pale bands encircling body.

scholarly journals Akysis longifilis, a new species of catfish (Teleostei: Akysidae) from Myanmar

Zootaxa ◽  
2006 ◽  
Vol 1150 (1) ◽  
pp. 19 ◽  
Author(s):  
HEOK HEE NG
Keyword(s):  
New Species ◽  
Species Group ◽  
Head Width ◽  
Posterior Edge ◽  
Caudal Peduncle ◽  
Body Depth ◽  
Pectoral Spine ◽  
Adipose Fin ◽  
Peduncle Length ◽  
A New Species

Akysis longifilis, new species, is described from the Sittang River drainage in Myanmar. It is a member of the A. variegatus species group and can be distinguished from congeners in the group (except for A. brachybarbatus, A. fuliginatus, A. pictus, A. prashadi, A. variegatus, A. varius and A. vespa) in having a smooth (vs. serrated) posterior edge of the pectoral spine. It is distinguished from A. brachybarbatus, A. fuliginatus, A. pictus, A. prashadi, A. variegatus, A. varius and A. vespa in having a unique combination of: length of adipose-fin base 25.7–31.1% SL, body depth at anus 9.7–13.6% SL, caudal peduncle length 18.3–23.2% SL, caudal peduncle depth 5.6–7.2% SL, head width 21.1–24.7% SL, nasal barbel length 67.4–96.4% HL, maxillary barbel length 123.2–159.6% HL, vertebrae 33–35, body with light saddle-shaped spots, and caudal fin forked.

Akysis bilustris, a new species of catfish from southern Laos (Siluriformes: Akysidae)

Zootaxa ◽  
2011 ◽  
Vol 3066 (1) ◽  
pp. 61
Author(s):  
HEOK HEE NG
Keyword(s):  
New Species ◽  
Base Length ◽  
Caudal Peduncle ◽  
Body Depth ◽  
Pectoral Spine ◽  
Eye Diameter ◽  
Adipose Fin ◽  
Peduncle Length ◽  
A New Species ◽  
Pelvic Fin

Akysis bilustris, new species, is described from the Xe Kong drainage (a subdrainage of the Mekong River) in southern Laos. It is distinguished from congeners in having a unique combination of the following characters: eye diameter 14.0– 17.5% HL, serrae on posterior margin of pectoral spine 2–3 and longer than half width of spine, pectoral fin reaching to or overlapping pelvic-fin base (length 24.5–29.3% SL), adipose-fin base length 14.3–18.3% SL, body depth at anus 11.4– 13.8% SL, caudal-peduncle length 19.6–23.4% SL, caudal-peduncle depth 6.7–9.2% SL, caudal fin emarginate, and vertebrae 30–31.

Akysis pulvinatus, a new species of catfish (Siluriformes: Akysidae) from southern Thailand

Zootaxa ◽  
2007 ◽  
Vol 1608 (1) ◽  
pp. 51-58
Author(s):  
HEOK HEE NG
Keyword(s):  
New Species ◽  
Lower Lobe ◽  
Head Width ◽  
Posterior Edge ◽  
Caudal Peduncle ◽  
Body Depth ◽  
Southern Thailand ◽  
Pectoral Spine ◽  
Adipose Fin ◽  
A New Species

Akysis pulvinatus, new species, is described from southern Thailand. It can be distinguished from congeners in having a combination of: length of adipose-fin base 23.0–25.2% SL, body depth at anus 13.2–16.0% SL, caudal peduncle depth 9.4–10.3% SL, head length 27.6–29.8% SL, head width 21.9–25.1% SL, length of nasal barbel 13.9–57.5% HL, length of maxillary barbel 78.5–105.0% HL, smooth posterior edge of pectoral spine, gently forked caudal fin with lower lobe longer than upper, yellow snout, and rounded pale colored patches on body. A possible case of Müllerian mimicry with the syntopic Pseudobagarius leucorhynchus is mentioned and briefly discussed.

Pseudolaguvia ferula, a new species of sisoroid catfish (Teleostei: Erethistidae) from India

Zootaxa ◽  
2006 ◽  
Vol 1229 (1) ◽  
pp. 59 ◽  
Author(s):  
HEOK HEE NG
Keyword(s):  
New Species ◽  
Head Width ◽  
Body Depth ◽  
Spine Length ◽  
Fin Ray ◽  
Pectoral Spine ◽  
Adipose Fin ◽  
Brown Body ◽  
A New Species ◽  
Pelvic Fin

Pseudolaguvia ferula, a new species of erethistid catish, is described from the Brahmaputra River drainage in India. It can be distinguished from congeners in having a terete (vs. depressed) head and body, manifested in the narrower head width (17.1–19.1% SL vs. 19.4–23.4), a smaller anterior fontanel (about one third the length of the frontals vs. at least half the length), and very faint, poorly contrasting cream bands that are sometimes absent on some individuals (vs. sharply contrasting cream bands on a brown body). It can be further distinguished from congeners in having a unique combination of the following characters: dorsal-spine length 17.3–18.7% SL, pectoral-spine length 20.2–24.3% SL, pelvic-fin length 13.0–14.7% SL, length of adipose-fin base 11.5–13.0% SL, caudal peduncle depth 6.9–7.8% SL, body depth at anus 12.1–13.8% SL, eye diameter 8.6–11.7% HL, vertebrae 28–30, and thoracic adhesive apparatus reaching to midway between bases of last pectoral-fin ray and first pelvic-fin ray. with its unculiferous ridges joined at their posterior ends.

Two new species of Pseudecheneis, rheophilic catfishes (Teleostei: Sisoridae) from Nepal

Zootaxa ◽  
2005 ◽  
Vol 1047 (1) ◽  
pp. 1 ◽  
Author(s):  
HEOK HEE NG ◽  
DAVID R. EDDS
Keyword(s):  
New Species ◽  
The Body ◽  
Unique Combination ◽  
Ganges River ◽  
Caudal Peduncle ◽  
Fin Ray ◽  
Two New Species ◽  
Eye Diameter ◽  
Adipose Fin ◽  
The Ganges

Two new species of sisorid catfish of the genus Pseudecheneis are described from tributaries of the Ganges River in Nepal: Pseudecheneis crassicauda and P. serracula. Pseudecheneis crassicauda can be distinguished from congeners by a unique combination of 38–39 vertebrae, caudal peduncle depth 6.0–6.6% SL, eye diameter 7.5–8.3% HL, length of adipose-fin base 20.3–24.3% SL, pelvic fins reaching the base of the first anal-fin ray, and the presence of pale spots on the body. Pseudecheneis serracula can be distinguished from congeners in having a unique combination of 36–38 vertebrae, strongly elevated neural spines of the last 2–3 preanal and first 6–7 postanal vertebrae, length of adipose-fin base 26.8–30.4% SL, pelvic fins reaching the base of the first analfin ray, and the presence of pale spots on the body.

Glyptothorax coracinus, a new species of hillstream catfish from Cambodia (Teleostei: Sisoridae)

Zootaxa ◽  
2008 ◽  
Vol 1839 (1) ◽  
pp. 60 ◽  
Author(s):  
HEOK HEE NG ◽  
WALTER J. RAINBOTH
Keyword(s):  
Dorsal Surface ◽  
Color Pattern ◽  
The Body ◽  
Caudal Peduncle ◽  
Body Depth ◽  
Fin Ray ◽  
Eye Diameter ◽  
Adipose Fin ◽  
Brown Body ◽  
A New Species

Glyptothorax coracinus sp. nov. is described from the western face of the Krâvanh (Cardamom) Mountains and Dâmrei (Elephant) Mountains in southwestern Cambodia. It can be distinguished from congeners by its color pattern consisting of blackish brown body with indistinct pale longitudinal stripes on the lateral line and mid-dorsal regions of the body, pale markings on the nuchal plate absent, length of adipose-fin base 12.3–14.5% SL, length of caudal peduncle 18.6– 21.0% SL, depth of caudal peduncle 7.9–9.4% SL, body depth at anus 11.0–14.6% SL, eye diameter 6.3–7.2% HL, 36– 37 vertebrae, tubercles on the dorsal surface of the head with a single, median ridge, and anastomosing striae absent on thoracic adhesive apparatus that does not reach the level of the base of the last pectoral-fin ray.

Two new species of Jupiaba (Characiformes: Characidae) from the rio Tapajós and rio Madeira drainages, Brazil, with an identification key to species of the genus

Zootaxa ◽  
2009 ◽  
Vol 2262 (1) ◽  
pp. 53-68 ◽  
Author(s):  
ANDRÉ L. NETTO-FERREIRA ◽  
ANGELA M. ZANATA ◽  
JOSÉ L.O. BIRINDELLI ◽  
LEANDRO M. SOUSA
Keyword(s):  
New Species ◽  
Lateral Line ◽  
Color Pattern ◽  
Dark Spot ◽  
Caudal Peduncle ◽  
Body Depth ◽  
Two New Species ◽  
Fin Rays ◽  
Eye Diameter ◽  
Rio Madeira

Two new species of Jupiaba Zanata are described from Brazil. Jupiaba iasy, new species, is described from rio Teles Pires and rio Jamanxim, tributaries of rio Tapajós, and from rio Aripuanã, in the rio Madeira drainage. It is distinguished from its congeners by its color pattern consisting of a single posteriorly displaced dark crescent-shaped humeral blotch, situated over the first 5 to 7 lateral line scales, and an inconspicuous dark spot at the end of caudal peduncle. It also differs from all remaining Jupiaba for the following combination of characters: 34-36 lateral line scales, 19–21 branched anal-fin rays, 8–10 predorsal scales arranged in a regular row, 6 horizontal series of scales above and 4 series below lateral line, body depth 32.3–36.1% of SL, and absence of filamentous rays in the first dorsal and anal-fin rays. Jupiaba paranatinga, new species, is described from rio Teles Pires, tributary of rio Tapajós. It is distinguished by having 34–35 lateral line scales, two vertically elongated humeral blotches, a conspicuous caudal spot at the end of the caudal peduncle, extending over 8–10 median caudal-fin rays, eye diameter 43.7–46.9% of HL, and relatively low body depth (31.3–35.5% of SL). Additionally, comments on the putative relationships of the new species with their congeners and an updated key to the species of the genus are provided.

Sign in / Sign up

Export Citation Format

Share Document