A new species of Trichomycterus (Siluriformes: Trichomycteridae) from the Andean Cordillera of Perú, with comments on relationships within the genus

Zootaxa ◽  
2007 ◽  
Vol 1545 (1) ◽  
pp. 49-57 ◽  
Author(s):  
LUIS FERNÁNDEZ ◽  
ROBERTO QUISPE CHUQUIHUAMANÍ
Keyword(s):  
New Species ◽  
Pectoral Fin ◽  
Dorsal Fin ◽  
Short Filament ◽  
The Andes ◽  
Andean Cordillera ◽  
Fin Ray ◽  
A New Species ◽  
Head Muscles ◽  
Pelvic Fin

Trichomycterus megantoni, new species, is described from several localities on the Andes of Perú at 1,360 to 2,200 m elevation. The new species differs from all congeners in the possession of autapomorphic characters: ventral interopercle with thickened integument and a reduced foramen in the frontal-supraoccipital. It is further distinguished by the following combination of characteristics: the tip of the pelvic fin when depressed does not reach the anus, the presence of a premaxilla rectangle, the first dorsal fin pterygiophore insertion at or posterior to vertebra 19 to 21, the supraorbital canal with pore 3, the outer tooth row with conic teeth, the head muscles not hypertrophied, the first pectoral fin ray prolonged as thin short filament, the possession of 17 pairs of ribs on each side, and 37 to 40 vertebrae.

Luciogobius yubai, a new species of gobioid fish (Teleostei: Gobiidae) from Japan

Zootaxa ◽  
2019 ◽  
Vol 4657 (3) ◽  
pp. 565-572
Author(s):  
YUJI IKEDA ◽  
KAZUAKI TAMADA ◽  
KENTAROU HIRASHIMA
Keyword(s):  
New Species ◽  
Posterior Part ◽  
Pectoral Fin ◽  
Dorsal Fin ◽  
Fin Ray ◽  
Eye Diameter ◽  
Dermal Flaps ◽  
Fin Length ◽  
A New Species ◽  
Pelvic Fin

A new gobioid fish Luciogobius yubai sp. nov. is described based on specimens collected from Wakayama and Shizuoka Prefectures, Japan. This species is distinguished from congeners by the following combination of characters; second dorsal-fin I, 9, anal-fin I, 10, pectoral-fin 17 or 18, vertebrate number 16+19=35, the first space between anterior two pterygiophores of second dorsal-fin placed the neural spines of vertebrae 17–18 or 17, four to seven developed dermal flaps under the eye longitudinally, posterior part of eye ridge protruded posteriorly, pectoral-fin with a long uppermost free ray, eye diameter 7.3–10.6 % of head length, pectoral-fin length 14.4–16.9 % of standard length (SL) , second dorsal-fin length 9.7–11.8 % SL, anal-fin ray length 9.1–11.1 % SL, pelvic-fin length 7.3–10.8 % SL, head and body with brownish orange coloration when alive or fresh.

Trichomycterus argos (Teleostei: Siluriformes: Trichomycteridae), a new species from the Doce River Basin, Eastern Brazil

Zootaxa ◽  
2012 ◽  
Vol 3352 (1) ◽  
pp. 60 ◽  
Author(s):  
ANTÔNIO QUEIROZ LEZAMA ◽  
MAURO L. TRIQUES ◽  
PATRÍCIA S. SANTOS
Keyword(s):  
New Species ◽  
Southeastern Brazil ◽  
Pectoral Fin ◽  
Dorsal Fin ◽  
Eastern Brazil ◽  
Fin Ray ◽  
Eye Diameter ◽  
Doce River ◽  
A New Species ◽  
Pelvic Fin

Trichomycterus argos, new species, is described from the Rio Doce basin, situated in the Serra do Brigadeiro (part of theSerra da Mantiqueira) range, southeastern Brazil. The new species is diagnosed by the following characteristics: presenceof six branched rays in the pectoral fin; presence of pelvic fins; tip of nasal barbels extending to posterior border of oper-cular plate of odontodes; presence of a large foramen for ramus lateralis accessorius facialis, visible in dorsal view, in theparietosupraoccipital bone; transverse and straight border between the parietosupraoccipital and frontal bones; pectoral-fin ray prolonged as a filament; body covered with spots that seldom attain eye diameter; pelvic-fin origin placed one or two ocular diameters anterior to dorsal-fin origin; abscence of spots fused as elongated marks on dorsum or flank.

A review of the genus Pareuchiloglanis (Sisoridae) from the Lancangjiang (upper Mekong River) with descriptions of two new species from Yunnan, China

Zootaxa ◽  
2007 ◽  
Vol 1440 (1) ◽  
pp. 1 ◽  
Author(s):  
XU LI ◽  
WEI ZHOU ◽  
ALFRED W. THOMSON ◽  
QING ZHANG ◽  
YING YANG
Keyword(s):  
New Species ◽  
Pectoral Fin ◽  
Caudal Fin ◽  
Lower Lip ◽  
Dorsal Fin ◽  
Gill Opening ◽  
Fin Ray ◽  
Two New Species ◽  
Adipose Fin ◽  
Pelvic Fin

This study reports five species of Pareuchiloglanis in the Lancangjiang drainage of China, including descriptions of two new species: P. abbreviatus sp. nov., P. gracilicaudata, P. kamengensis, P. myzostoma and P. prolixdorsalis sp. nov. The two new species are distinguished from P. feae, P. poilanei, P. sichuanensis and P. tianquanensis by a shorter adipose-fin base and the adipose-fin base being separated from the caudal fin, differ from P. sinensis, P. macrotrema, P. longicauda and P. rhabdurus by a more restricted gill opening (not reaching the base of the first pectoral-fin element ventrally), and differ from P. songmaensis by an anal-fin ray count of ii-3-4 (vs. ii-8). Pareuchiloglanis abbreviatus is distinguished from congeners by the tip of the dorsal fin reaching the origin of the adipose fin when depressed. Pareuchiloglanis prolixdorsalis is distinguished from P. gongshanensis, P. macropterus and P. kamengensis by lacking a sulcus between the lower lip and the base of the maxillary barbel, and differs from P. anteanalis by the shorter pectoral fin, the pectoral fin not reaching to the origin of pelvic fin. It differs from P. gracilicaudata, P. myzostoma, P. nebulifer and P. robusta by a caudal-fin ray count of 6+7 (vs. 7+8), and differs from P. abbreviatus by the tip of dorsal fin not reaching to the origin of the adipose fin when depressed (vs. reaching). It differs from P. songdaensis by the distance between the origin of the pelvic fin to the base of the anal fin being longer than that to the mouth (vs. equal).  

Odontamblyopus rebecca, a new species of amblyopine goby from Vietnam with a key to known species of the genus (Gobiidae: Amblyopinae)

Zootaxa ◽  
2003 ◽  
Vol 138 (1) ◽  
pp. 1 ◽  
Author(s):  
EDWARD O. MURDY ◽  
KOICHI SHIBUKAWA
Keyword(s):  
New Species ◽  
Pectoral Fin ◽  
Dorsal Fin ◽  
Caudal Vertebrae ◽  
Fin Ray ◽  
A New Species

A new species of amblyopine goby, Odontamblyopus rebecca, is described on the basis of 37 specimens from Vietnam. It differs from other species of Odontamblyopus by the following combination of characters: caudal vertebrae typically 20; dorsal fin with 44-48 total elements; anal fin with 37-42 total elements; and pectoral-fin ray count 40-51. This species is figured and compared with other known species of Odontamblyopus.

Boraras naevus, a new species of miniature and sexually dichromatic freshwater fish from peninsular Thailand (Ostariophysi: Cyprinidae)

Zootaxa ◽  
2011 ◽  
Vol 3002 (1) ◽  
pp. 45 ◽  
Author(s):  
KEVIN W. CONWAY ◽  
MAURICE KOTTELAT
Keyword(s):  
New Species ◽  
Freshwater Fish ◽  
Colour Pattern ◽  
Sexually Dimorphic ◽  
Caudal Fin ◽  
Dorsal Fin ◽  
Fin Ray ◽  
A New Species ◽  
Lateral Scale ◽  
Pelvic Fin

Boraras naevus, new species, is described from peninsular Thailand. It is distinguished from other congeners by features of its sexually dimorphic colour pattern, principal caudal-fin, pelvic-fin and branched dorsal-fin ray counts, lateral scale row counts, and a number of osteological features.

scholarly journals A new species of Metzia (Cypriniformes: Cyprinidae) from Northern Laos

Zootaxa ◽  
2012 ◽  
Vol 3586 (1) ◽  
pp. 264 ◽  
Author(s):  
KOICHI SHIBUKAWA ◽  
PHOUVIN PHOUSAVANH ◽  
KONEUMA PHONGSA ◽  
AKIHISA IWATA
Keyword(s):  
New Species ◽  
Cyprinid Fish ◽  
Dorsal Fin ◽  
Line Scale ◽  
Fin Ray ◽  
Fin Rays ◽  
Predorsal Scale ◽  
A New Species ◽  
Diagnostic Traits ◽  
Pelvic Fin

A new cyprinid fish, Metzia bounthobi, is described on the basis of 18 specimens (including 10 specimens in type series)from the Mekong River basin in Phongsaly and Luang Prabang Provinces, northern Laos. The species is distinguishedfrom congeners by having the following diagnostic traits: 18–20 branched anal-fin rays (vs. 10–18 in the others); 49–55lateral-line scale rows (vs. 35–48); 33–36 predorsal scale rows (vs. 15–20); 20–22 circumpeduncular scale rows (vs.14–18); 8–10 gill rakers on outer surface of first gill arch (vs. 12–18). The new species also resembles species of Hemic-ulterella, Ischikauia and at least some species of Anabarilius, in sharing a sharp keel developed only between the base ofthe pelvic fin and anus, soft last unbranched dorsal-fin ray, and air bladder composed of two chambers; however, M.bounthobi differs in having a considerably rounded snout (vs. pointed in Hemiculterella, Ischikauia and Anabarilius),18–20 branched anal-fin rays (vs. 8–17 in Hemiculterella, Ischiakuia and Anabarilius), 49–55 lateral-line scale rows (vs.more than 58 in Ischikauia and Anabarilius, except for A. transmontana with 54–57), air bladder with rounded posteriorend (vs. posterior end with a small lobe at least in Hemiculterella) and 39–40 vertebrae (vs. 40–43, 42–43 and 43–48 in Hemiculterella, Ischikauia and Anabarilius, respectively).

A new species of Trimma (Pisces: Gobiidae) from the northern Palauan Islands, western Pacific Ocean

Zootaxa ◽  
2020 ◽  
Vol 4808 (3) ◽  
pp. 582-588
Author(s):  
RICHARD WINTERBOTTOM
Keyword(s):  
New Species ◽  
Dark Spot ◽  
Western Pacific Ocean ◽  
Posterior Portion ◽  
Dorsal Fin ◽  
Yellow Body ◽  
Fin Ray ◽  
A New Species ◽  
Pectoral Fin Rays ◽  
Pelvic Fin

A new species of Trimma is described from the northern Palaun islands. Trimma kalum n. sp. lacks scales on the cheeks, opercle and nape, has an elongate second spine of the first dorsal fin, reaching posteriorly to the base of the 2nd–10th ray of the second dorsal fin when adpressed, 17–18 pectoral-fin rays with 12–13 branched rays in the middle of the fin, a single dichotomous branch point in the 5th pelvic-fin ray, which is 51–75% the length of the 4th ray, a very well developed dermal crest in the midline between the base of the first dorsal spine and the posterior interorbital region, a U-shaped interorbital trench with no fleshy median ridge, a poorly developed postorbital trench ending between the 4th to 5th papillae in row p, which has 6 papillae in total, and there are 5 papillae in row c beneath the eye. When live and freshly collected, the species is very similar in appearance to T. sheppardi, with an overall yellow body, three yellow bars across the cheek, and a double dark spot above the posterior portion of the opercle. 

Exostoma dulongensis, a new glyptosternine catfish from the Irrawaddy basin, Yunnan, China (Siluriformes: Sisoridae) 

Zootaxa ◽  
2020 ◽  
Vol 4802 (1) ◽  
pp. 99-110
Author(s):  
ZHAOJUN LUO ◽  
XIAOYONG CHEN
Keyword(s):  
New Species ◽  
Yunnan Province ◽  
Posterior Edge ◽  
Pectoral Fin ◽  
Caudal Fin ◽  
Dorsal Fin ◽  
Adipose Fin ◽  
A New Species ◽  
Preanal Length ◽  
Pelvic Fin

Exostoma dulongensis sp. nov., a new species of sisorid catfish from the genus Exostoma Blyth, 1860, is described from the Xiaojiang River and Dulongjiang River, tributaries of N’mai Hka River in the Irrawaddy basin, Yunnan Province, China. Exostoma dulongensis sp. nov. is the seventeenth species reported within this genus and is most similar to Exostoma ericinum Ng 2018 in morphology but can be distinguished by the following characters: tip of pelvic fin far from anus vs. reaching when depressed; nasal barbel reaching or surpassing posterior edge of orbit vs. just reaching middle of orbit; greater preanal length (70.9%–80.1% SL vs. 67.7%–70.5%); and longer dorsal to adipose length (13.5%–23.8% SL vs. 8.0%–12.0%). The new species can also be distinguished from all known congeners by the following characters: adipose fin confluent with caudal fin and without incision; caudal fin weakly forked; 40–43 vertebrae; and pectoral fin extending to vicinity of dorsal fin origin. 

Two new species of Trimma (Pisces; Gobiidae) from Fiji, south-western Pacific Ocean

Zootaxa ◽  
2017 ◽  
Vol 4269 (4) ◽  
pp. 559 ◽  
Author(s):  
RICHARD WINTERBOTTOM
Keyword(s):  
New Species ◽  
Brown Spot ◽  
Colour Pattern ◽  
Pectoral Fin ◽  
Dorsal Fin ◽  
Fin Ray ◽  
Two New Species ◽  
Fin Rays ◽  
Pectoral Fin Rays ◽  
Pelvic Fin

Two new species of Trimma are described from Fiji. Trimma bathum n. sp. lacks scales on the cheeks, opercle and predorsal midline, has 18–19 unbranched pectoral fin rays, an unbranched 5th pelvic fin ray that is 40–56% the length of the 4th ray, 17–18 gill rakers on the outer surface of the first gill arch, a U-shaped interorbital and a narrow slit-like postorbital trench, a low, median fleshy ridge extending half-way towards the orbit from the origin of the first dorsal fin, and, when freshly collected, a pink head and body with most body scales having an orange-brown spot or short bar at their centres. The species is currently known only from off Suva Harbour, Viti Levu, Fiji. Trimma finistrinum n. sp. has a bony interorbital equal to the pupil diameter, a fully scaled nape of 12–14 scales, a second dorsal spine that may reach posteriorly to the middle of the second dorsal fin, the papillae in the longitudinal row immediately below the eye either single or with two papillae in a vertical row, unbranched pectoral fin rays, usually a branched fifth pelvic-fin ray that is about half length of the fourth ray, and a large diffuse dark blotch on the posterior part of the caudal peduncle. A colour pattern of a brownish body with most body scales having golden- to greenish-yellow (pale in preservative) centres is unique among species of the genus. The species is currently recorded only from off the north and east coasts of Viti Levu, Fiji.

Glossanodon macrocephalus, a new argentine fish (Argentinidae) from the Arabian Sea

Zootaxa ◽  
2019 ◽  
Vol 4688 (2) ◽  
pp. 289-294 ◽  
Author(s):  
KINATTUMKARA BINEESH ◽  
MUSALIYARAKAM NASHAD ◽  
K.V. ANEESH KUMAR ◽  
HIROMITSU ENDO
Keyword(s):  
New Species ◽  
Arabian Sea ◽  
Dark Spot ◽  
Pectoral Fin ◽  
Black Stripe ◽  
Dorsal Fin ◽  
Fin Rays ◽  
Eye Diameter ◽  
A New Species ◽  
Pelvic Fin

A new species of argentinid fish, Glossanodon macrocephalus Bineesh & Endo, from the Arabian Sea, off the southwestern coast of India, is described on the basis of four specimens (129–164 mm SL). The new species clearly differs from its congeners in the following combination of characters: dorsal-fin rays 10–11; pectoral-fin rays 21–23; anal-fin rays 12–13; pelvic-fin rays 11–12; branchiostegal rays 5; gill rakers on first arch 30–36; vertebrae 47–48; a patch of small conical teeth on middle of lower jaws; predorsal 49–51% SL; prepectoral 36–39% SL; prepelvic 57–58% SL; distance from pelvic to anal-fin origin 26–28% SL; head length 35–39% SL; eye diameter 22–26% HL; snout length 28–30% HL; location of anus immediately anterior to anal-fin origin; broad longitudinal black stripe above lateral line; dark spot on the base to half of pectoral fin; and no teeth on tongue. The new species is a benthopelagic dweller on muddy bottoms in depths of around 300–600 m. 

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