scholarly journals The variability of morphometric and meristic characteristics of Urmia chub, Petroleuciscus ulanus (G nther, 1899) in the Mahabd-Chai and Godar-Chai rivers, Lake Urmia basin

2021 ◽  
pp. 1156-1159
Author(s):  
K. Abbasi ◽  
◽  
A. Mouludi-Saleh ◽  
S. Eagderi ◽  
◽  
...  
Keyword(s):  
Inland Waters ◽  
Lake Urmia ◽  
Caudal Peduncle ◽  
Biological Features ◽  
Dorsal Fin ◽  
Eye Diameter ◽  
Peduncle Length ◽  
First Time ◽  
Two Populations ◽  
Meristic Data

Abstract. In this study, for the first time, we provide morphometric and meristic data on Petroleuciscus ulanus from the Lake Urmia basin by comparing them in the populations of the Mahabad-Chai and Godar-Chai rivers. For this purpose, a total of 100 specimens were collected using electrofishing device and cast net during 2014 and 2015. 19 morphometric and 8 meristic traits were measured and counted, respectively. The meristic traits of the two populations showed significant differences in three characters, including branched dorsal and ventral fin rays and lateral line scales (P<0.05). In addition, the morphometric analysis showed significant differences in head length, eye diameter, caudal peduncle length, dorsal fin height and base lengths, pectoral and ventral fin lengths, anal fin base and height lengths (P<0.05). The finding of the current study can help to further studies on the biological features of this endemic species of Iranian inland waters.

A new species of Metahomaloptera (Teleostei: Balitoridae) from China

Zootaxa ◽  
2007 ◽  
Vol 1526 (1) ◽  
pp. 63-68
Author(s):  
JIAN YANG ◽  
XIAOYONG CHEN ◽  
JUNXING YANG
Keyword(s):  
New Species ◽  
Head Width ◽  
Pectoral Fin ◽  
Caudal Peduncle ◽  
Jinsha River ◽  
Dorsal Fin ◽  
Mouth Width ◽  
Eye Diameter ◽  
Peduncle Length ◽  
A New Species

A new species of Metahomaloptera, M. longicauda, is described from the lower Jinsha River, China. The new species is distinguished from other species of Metahomaloptera by the following combination of characters: pectoral fin with 11– 15 branched rays, tip of pectoral fin extending beyond origin of dorsal fin, pelvic fin with 10–12 branched rays, pelvicfin tip reaching or extending beyond anus, dorsal fin inserting before middle of body, tip of dorsal fin far from vertical line of caudal-fin base, head width 19.4–22.6% SL, pre-pectoral length 8.4–9.9% SL, pre-anal length 69.0–74.3% SL, caudal peduncle length 17.1–20.7% SL, eye diameter 14.6–16.6% HL, caudal peduncle depth 33.7–43.1% caudal peduncle length, mouth width 63.2–75.5% body width at pectoral-fin origin.

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. 

A new species of Stiphodon from southern Sumatra (Pisces: Gobioidei: Sicydiinae)

Zootaxa ◽  
2008 ◽  
Vol 1715 (1) ◽  
pp. 43 ◽  
Author(s):  
RONALD E. WATSON
Keyword(s):  
Papua New Guinea ◽  
Sexually Dimorphic ◽  
Fatty Tissue ◽  
Pectoral Fin ◽  
Caudal Peduncle ◽  
Dorsal Fin ◽  
Fin Rays ◽  
The Indian Ocean ◽  
First Time ◽  
A New Species

Stiphodon carisa, n. sp., is described based on material collected in the southernmost watershed in Lampung Province, Sumatra, Indonesia. Stiphodon carisa, n. sp., differs from all other congeners by a combination of characteristics that include having 9 second-dorsal fin rays; 15 pectoral-fin rays; 41–59 premaxillary teeth; predorsal scales sexually dimorphic in number, male with 5–11 and female with 8–16; 25–35 lateral scales; slightly embedded cycloid scales present on belly; male with a triangular-shaped first-dorsal fin with third and/or fourth spines longest but not filamentous and a patch of white fatty tissue posterior to pectoral-fin base; female usually with 5 (4–5) dusky to blackish blotches or spots along lateral midline from second-dorsal fin with usually 4 (3–4) posterior-most spots positioned close together on caudal peduncle, dusky band extending from anterior to eye to upper hypural base usually indistinct posterior to pectoral-fin base, with or without a dusky or black gular blotch; in some females xanthism exists which fades in preservation and in life yellow with orange to bright red markings. Stiphodon semoni is a species common in hill streams of eastern Indonesia and Papua New Guinea and is reported here for the first time from streams entering the Indian Ocean in Lampung Province, Sumatra, Indonesia.

Amblyceps cerinum, a new catfish (Teleostei: Amblycipitidae) from northeastern India

Zootaxa ◽  
2010 ◽  
Vol 2672 (1) ◽  
pp. 50 ◽  
Author(s):  
HEOK HEE NG ◽  
JEREMY J. WRIGHT
Keyword(s):  
South Asian ◽  
West Bengal ◽  
New South ◽  
Taxonomic Status ◽  
Caudal Peduncle ◽  
Caudal Fin ◽  
Dorsal Fin ◽  
Adipose Fin ◽  
Peduncle Length ◽  
Fin Length

Amblyceps cerinum, a new South Asian amblycipitid catfish species, is described from the Brahmaputra River drainage in northern West Bengal, India. The new species can be distinguished from congeners in having a combination of upper jaw longer than lower, incomplete lateral line terminating beneath posterior insertion of dorsal fin, length of adipose-fin base 32.4–38.3% SL, caudal peduncle length 21.9–24.5% SL, caudal peduncle depth 9.2–11.2% SL, 41–44 postWeberian vertebrae, posterior end of adipose fin separated from dorsal procurrent caudal-fin rays by distinct notch, and truncate caudal fin. The taxonomic status of A. tenuispinis is also discussed and a neotype designated for this species.

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.

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.

scholarly journals Occurrence of the genus Amblyceps Blyth (Teleostei: Amblycipitidae) from the Indo-Bhutan streams of the Brahmaputra drainage of Assam, India

2014 ◽  
Vol 6 (1) ◽  
pp. 177-181
Author(s):  
Sewali Pathak ◽  
Mrigendra M. Goswami ◽  
Nripendra Nath Sarma
Keyword(s):  
The Body ◽  
Caudal Peduncle ◽  
Caudal Fin ◽  
Eye Diameter ◽  
Orbital Space ◽  
Adipose Fin ◽  
Peduncle Length ◽  
General Appearance

Three species of the genus Amblyceps, namely, A. apangi, A. arunachalensis, A. mangois are described from Kanamakra and Langkhar (26°45′0″ ̶ 26°48′0″N and 90°35′0″ ̶ 90°40′0″E) hill streams of Chirang district of Assam. The torrent catfishes are distinguished within the genera on the basis of their general appearance of the body and the caudal fin structure, adipose fin, eye diameter, inter-orbital space, fold on lip and number of vertebrae. The caudal peduncle height for A. apangi (12.36 ̶ 12.73% SL), A. mangois (14.25 ̶ 15.36% SL) and A. arunachalensis(10.01 ̶ 11.42% SL), caudal peduncle length for A. apangi (20.29 ̶ 20.87% SL), A. arunachalensis (22.00 ̶ 22.11% SL) and A. mangois (19.09 ̶ 19.31% SL) and other taxonomic details of the congeners with their distributional status are discussed.

Etmopterus burgessi sp. nov., a new species of lanternshark (Squaliformes: Etmopteridae) from Taiwan

Zootaxa ◽  
2006 ◽  
Vol 1373 (1) ◽  
pp. 53 ◽  
Author(s):  
JAYNA A.S.-D. SILVA ◽  
DAVID A. EBERT
Keyword(s):  
New Species ◽  
North Pacific ◽  
Western North Pacific ◽  
Gill Slit ◽  
Caudal Peduncle ◽  
Dorsal Fin ◽  
Slit Length ◽  
Peduncle Length ◽  
A New Species ◽  
Distinguishing Character

A new species of lanternshark, Etmopterus burgessi sp. nov., is described from four specimens collected in deepwater off northeastern Taiwan. The new species closely resembles other members of the “Etmopterus lucifer group” in having longitudinal rows of dermal denticles, but can be distinguished from congeners based on the following characters: snout width, gill slit length, caudal peduncle length, second dorsal fin height, the arrangement of flank and caudal markings, tooth morphology, and the presence or absence of dermal denticles. The new species has a broader snout and gill length proportionally longer than other western North Pacific Etmopterus species. Proportionally, E. burgessi has a shorter second dorsal fin height and caudal peduncle length than other Etmopterus species. In addition, both the second dorsal fin and ventral snout surface of E. burgessi have conspicuous dermal denticles. A final distinguishing character of E. burgessi is the flank marking, which resembles E. lucifer.Key-words: Elasmobranchii, Squaliformes, Etmopteridae, Etmopterus, Taiwan

Leiocassis rudicula (Teleostei: Siluriformes: Bagridae), a new catfish from eastern Borneo

Zootaxa ◽  
2019 ◽  
Vol 4651 (1) ◽  
pp. 191-200
Author(s):  
HEOK HEE NG ◽  
RENNY K. HADIATY
Keyword(s):  
New Species ◽  
Posterior Margin ◽  
Unique Combination ◽  
Caudal Peduncle ◽  
Body Depth ◽  
Dorsal Fin ◽  
Brown Band ◽  
Eye Diameter ◽  
Adipose Fin ◽  
A New Species

A new species of bagrid catfish in the genus Leiocassis is described from the Mahakam River drainage in eastern Borneo. Leiocassis rudicula, new species, can be distinguished from congeners in having a unique combination of: distinct concavity at level of orbit in dorsolateral profile of head; tip of supraoccipital spine not reaching anterior nuchal plate element; smooth posterior margin of dorsal spine; presence of an irregular pale band on sides of body between dorsal and adipose fins; anal fin with narrow brown band across middle third of fin; narrow caudal-fin lobes with nearly straight posterior margins; snout length 36–40% HL; eye diameter 14–20% HL; head depth 17.6–20.0% SL; length of dorsal-fin spine 14.1–18.5% SL; length of pectoral-fin spine 15.1–17.7 %SL; dorsal-to-adipose distance 10.9–14.3% SL; body depth at anus 16.4–19.5% SL; length of adipose-fin base 18.9–24.1% SL; length of anal-fin base 18.8–22.6% SL; and caudal peduncle depth 9.1–10.9% SL. A revised key to the genus is also provided. 

scholarly journals Morphometric features of topmouth gudgeon Pseudorasbora parva (Temminck & Schlegel, 1846) in the Hirfanlı Reservoir, Turkey

2020 ◽  
Vol 7 (1) ◽  
pp. 8
Author(s):  
Semra Benzer
Keyword(s):  
Fork Length ◽  
Pseudorasbora Parva ◽  
Pectoral Fin ◽  
Caudal Peduncle ◽  
Morphometric Characters ◽  
Topmouth Gudgeon ◽  
Dorsal Fin ◽  
Peduncle Length ◽  
Fin Length ◽  
Pelvic Fin

The aim of this study was to some morphometric characteristics of Pseudorasbora parva from Hirfanlı Reservoir, Turkey. A morphological analysis of 29 morphometric characters were performed. These characteristics head length; preorbital distance; eye diameter; postorbital distance; head depth; predorsal distance; prepelvic distance; preanal distance; pectoral fin–pelvic fin (P-V) distance; pelvic fin– anal fin (V-A) distance; body depth (18 perpendicular); dorsal fin (anterior end)-anal fin distance (Da-A); dorsal fin (posterior end)–anal fin distance (Dp-A); postdorsal distance; postanal distance; caudal (C) peduncle length (dorsal); caudal peduncle length (ventral); caudal peduncle depth; dorsal fin (D) base length; anal fin (A) base fin length; pectoral fin (P) length; pelvic (V) fin length; caudal upper lobe length; caudal fork length; caudal lower lobe length; dorsal fin length; anal fin length; gape. The samples were measured weight to the nearest 0.01g and total, fork and standard length to the nearest 0.01 mm. The total length (TL) ranged from 4.10 cm to 9.30 cm and body weight ranged from 0.600 to 7.137 g.Keywords: Pseudorasbora parva; topmouth gudgeon; morphometric properties; Hirfanlı Reservoir

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