Two new trans-Andean species of Imparfinis Eigenmann & Norris, 1900 (Siluriformes: Heptapteridae) from Colombia

Two new species of Imparfinis are described from the trans-Andean region of Colombia. Imparfinis timana is diagnosed by having longer anal fin base (12.4-15.5% in SL), in combination with long adipose fin (24.6-31.3% in SL), 5-6 gill rakers on the first ceratobranchial, 42-43 vertebrae and additional measurements. Imparfinis usmai is distinguished by the combination of first ray of dorsal fin longest, but not projected as a long filament, long adipose fin (21.1-27.0% in SL), maxillary barbel exceeding pelvic-fin base, 39-40 vertebrae, upper caudal-fin lobe pointed and longer than lower lobe, lower lobe rounded, 7-8 gill rakers on the first ceratobranchial, as well as additional measurements. Imparfinis timana is only known from río Guarapas, a small tributary of the upper course of the río Magdalena. Imparfinis usmai is broadly distributed in the upper basin of ríos Cauca and Magdalena, and in the lower Patía river basin. The restricted distribution of I. nemacheir to trans-Andean drainages (Atrato, Magdalena, and Lago de Maracaibo) is also discussed.

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

Zootaxa ◽

10.11646/zootaxa.1440.1.1 ◽

2007 ◽

Vol 1440 (1) ◽

pp. 1 ◽

Cited By ~ 4

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).

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Phenacorhamdia cabocla, a new heptapterid from the Parnaíba River basin, Northeastern Brazil (Siluriformes: Heptapteridae)

Zootaxa ◽

10.11646/zootaxa.4402.2.7 ◽

2018 ◽

Vol 4402 (2) ◽

pp. 353 ◽

Cited By ~ 1

Author(s):

YURI GOMES PONCE DE CARVALHO ROCHA ◽

TELTON PEDRO ANSELMO RAMOS ◽

ROBSON TAMAR DA COSTA RAMOS

Keyword(s):

River Basin ◽

Lower Lobe ◽

Northeastern Brazil ◽

Valid Species ◽

Neural Spine ◽

Caudal Fin ◽

Pectoral Fins ◽

Dorsal Fin ◽

First Ray ◽

Adipose Fin

Phenacorhamdia Dahl, 1961 comprises 11 valid species of small demersal and solitary catfishes which occur mainly along riverbeds and are widely distributed throughout rivers of South America. The genus is included within the Nemuroglanis subclade, and species of Phenacorhamdia can be separated from other heptapterid catfishes through external and internal characters. Diagnostic characters include a prognathous mouth, first ray of dorsal and pectoral fins flexible, eight or nine branched rays in the lower lobe of caudal fin, and optic foramen reduced. A new species of Phenacorhamdia is described herein from the upper Parnaíba river basin. Phenacorhamdia cabocla sp. nov is distinct from its congeners by: total vertebrae 44, nine of which with pleural ribs; bifid neural spines until vertebrae 13; last precaudal vertebrae lacking pleural ribs; 7–8 branchiostegal rays; pectoral-fin rays i+6; first pterygiophore of dorsal-fin associated to the neural spine of twelfth vertebrae; dorsal-fin pterygiophores associated to vertebrae 12 to 16; anal-fin with nine branched and 3–4 unbranched rays; upper and lower lobes of caudal fin with 8–9 branched rays each; adipose fin corresponding to 14.9%–18.1% of standard length; and snout length corresponding to 30.0%–35.9% of head length.

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Stolephorus grandis, a new anchovy (Teleostei: Clupeiformes: Engraulidae) from New Guinea and Australia

Zootaxa ◽

10.11646/zootaxa.5004.3.5 ◽

2021 ◽

Vol 5004 (3) ◽

pp. 481-489

Author(s):

HARUTAKA HATA ◽

HIROYUKI MOTOMURA

Keyword(s):

New Species ◽

Posterior Margin ◽

New Guinea ◽

Gill Arch ◽

The Other ◽

Gill Rakers ◽

Caudal Peduncle ◽

Dorsal Fin ◽

Pelvic Fin

The new anchovy Stolephorus grandis n. sp., described on the basis of 10 specimens collected from Papua, Indonesia, and Australia, closely resembles Stolephorus mercurius Hata, Lavoué & Motomura, 2021, Stolephorus multibranchus Wongratana, 1987, and Stolephorus rex Jordan & Seale, 1926, all having double pigmented lines on the dorsum from the occiput to the dorsal-fin origin, a long maxilla (posterior tip just reaching or slightly beyond the posterior margin of preopercle), and lacking a predorsal scute. However, the new species clearly differs from the others in having fewer gill rakers (35–39 total gill rakers on the first gill arch in S. grandis vs. > 38 in the other species), a greater number of vertebrae (total vertebrae 42–43 vs. fewer than 41), longer caudal peduncle (21.9–23.7% SL vs. < 20.8%), and the depressed pelvic fin not reaching posteriorly to vertical through the dorsal fin-origin (vs. reaching beyond level of dorsal-fin origin).

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A new species of Pimelodella Eigenmann & Eigenmann, 1888 (Siluriformes: Heptapteridae) from the Orinoco River basin

Zootaxa ◽

10.11646/zootaxa.4808.3.5 ◽

2020 ◽

Vol 4808 (3) ◽

pp. 491-506

Author(s):

MIGUEL ÁNGEL CORTÉS-HERNÁNDEZ ◽

CARLOS DONASCIMIENTO ◽

HERNANDO RAMÍREZ-GIL

Keyword(s):

New Species ◽

River Basin ◽

Taxonomic Status ◽

Dorsal Lobe ◽

Caudal Peduncle ◽

Caudal Fin ◽

Orinoco River ◽

Dorsal Fin ◽

Adipose Fin ◽

A New Species

A new species of Pimelodella is described from western Andean tributaries of the Orinoco River basin. The new species differs from all congeners by a unique set of characters that includes long maxillary barbel, surpassing the dorsal lobe of the caudal fin; relatively short adipose fin (32.8–36.4 of SL); 40–42 total vertebrae; posterior margin of pectoral-fin spine with 12–18 retrorse dentations along basal two thirds; laterosensory canal foramina of dentary and preopercle large and externally conspicuous; a brown faint and narrow midlateral stripe extending from the pseudotympanum, fading posteriorly along the caudal peduncle, and ending as a spot at the caudal-fin base; and dorsal-fin base darkly pigmented, from spinelet to posteriormost interradial membrane. Taxonomic status of P. pallida and presence of P. cruxenti in Colombia are also discussed.

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A new species of Tyttocharax (Characiformes: Characidae: Stevardiinae) from the Güejar river, Orinoco river Basin, Colombia

Neotropical Ichthyology ◽

10.1590/s1679-62252012000300004 ◽

2012 ◽

Vol 10 (3) ◽

pp. 519-525 ◽

Cited By ~ 1

Author(s):

César Román-Valencia ◽

Carlos A. García-Alzate ◽

Raquel I Ruiz-C ◽

C Donald ◽

B Taphorn

Keyword(s):

New Species ◽

Lateral Line ◽

River System ◽

First Record ◽

Dorsal Fin ◽

Fin Rays ◽

Adipose Fin ◽

A New Species ◽

Pectoral Fin Rays ◽

Pelvic Fin

A new Tyttocharax species from the Güejar River system, near the Macarena Mountains in Colombia is described. This is the first record for the genus from the Orinoco basin. The combination of the following characters distinguish Tyttocharax metae from its congeners: presence of bony hooks on the pectoral and caudal-fin rays; bony hooks on the anal-fin rays larger than those on the pelvic-fin rays; pectoral-fin rays i,5-6,i; presence of three unbranched dorsal-fin rays; absence of an adipose fin; four scales rows between the anal-fin origin and the lateral line; and four scale rows between the pelvic-fin and the lateral line. Ecological characteristics of the habitat of the new species are also presented.

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A review of the deepwater cardinalfish genus Epigonus (Perciformes: Epigonidae) of the Western Indian Ocean, with description of two new species

Zootaxa ◽

10.11646/zootaxa.4382.2.3 ◽

2018 ◽

Vol 4382 (2) ◽

pp. 261 ◽

Cited By ~ 2

Author(s):

MAKOTO OKAMOTO ◽

OFER GON

Keyword(s):

New Species ◽

Indian Ocean ◽

Western Indian Ocean ◽

Gulf Of Aden ◽

Gill Rakers ◽

Dorsal Fin ◽

Lower Jaw ◽

Two New Species ◽

Opercular Spine ◽

Abdominal Vertebra

The fishes of the genus Epigonus Rafinesque, 1810 in the Western Indian Ocean (including the Red Sea and the Gulf of Aden) are reviewed. Twelve species of the genus are recognized: Epigonus angustifrons Abramov & Manilo, 1987; E. denticulatus Dieuzeide, 1950; E. elongatus Parin & Abramov, 1986; E. exodon Okamoto & Motomura, 2012; E. lenimen (Whitley, 1935); E. macrops (Brauer, 1906); E. marimonticolus Parin & Abramov, 1986; E. marisrubri Krupp, Zajonz & Khalaf, 2009; E. pectinifer Mayer, 1974; E. robustus (Barnard, 1927); E. telescopus (Risso, 1810); E. waltersensis Parin & Abramov, 1986, and two new species, E. bispinosus n. sp. and E. idai n. sp. Epigonus bispinosus and E. idai belong to the E. constanciae group, defined as having a pungent opercular spine, more than 45 pored lateral-line scales, and lacking an isolated dorsal fin spine between the first- and second dorsal fins. Epigonus bispinosus differs from other members of the group in having two small spines on the symphysis of lower jaw, a pair of ribs on the last abdominal vertebra, 10 + 15 vertebrae, 31–33 gill rakers and lacking a maxillary mustache-like process. Epigonus idai differs from other members of the group in having a pair of ribs on the last abdominal vertebra, 4–5 tiny projections present on symphysis of lower jaw, 10 + 15 vertebrae, strongly ctenoid scales, and 28–29 gill rakers, and in lacking a maxillary mustache-like process. A key to the species, photographs, diagnoses, and distributions in the Western Indian Ocean are given.

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Polydactylus luparensis, a new species of threadfin (Perciformes: Polynemidae) from the Batang Lupar River, Sarawak, Borneo, Malaysia

Zootaxa ◽

10.11646/zootaxa.2405.1.4 ◽

2010 ◽

Vol 2405 (1) ◽

pp. 63

Author(s):

PEK KHIOK ANNIE LIM ◽

HIROYUKI MOTOMURA ◽

ALBERT CHUAN GAMBANG

Keyword(s):

New Species ◽

Lateral Line ◽

Lower Limb ◽

Posterior Margin ◽

Gill Rakers ◽

Caudal Fin ◽

Dorsal Fin ◽

Basal Half ◽

A New Species ◽

Pelvic Fin

A new species of large-sized brackishwater threadfin, Polydactylus luparensis, is described from the Batang Lupar River in Sarawak, Malaysia, Borneo on the basis of 5 specimens (610–715 mm standard length). The new species can be distinguished from all other Polydactylus by having 8 dorsal-fin spines, first spine tiny, second spine very strong (its width more than 5 times the width of remaining spines); 13 second dorsal-fin soft rays; 11 anal-fin soft rays; 12 pectoralfin rays, its length 22–24% (mean 23%) of SL, posterior tip not reaching a vertical through posterior tip of depressed pelvic fin; 6 pectoral filaments, fourth or fifth filament longest, its length 77–85% (mean 81%) of SL, posterior tip extending slightly beyond caudal-fin base; pored lateral-lined scales 67–75 (mean 71); lateral line unbranched, extending onto upper end of lower caudal-fin lobe; 6 scale rows above lateral line, 8 below; 14 gill rakers on upper limb, 18 on lower limb, 32 in total; occipital profile concave; posterior margin of maxilla extending considerably beyond a vertical through posterior margin of adipose eyelid; depth of posterior margin of maxilla 4–5% (mean 5%) of SL, greater than orbit diameter; well-developed swimbladder present; basal half of third to sixth pectoral filament white, becoming black distally. Polydactylus luparensis is currently known only from the mouth of the Batang Lupar River.

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A new endemic species of Bryconamericus (Characiformes, Characidae) from the Middle Cauca River Basin, Colombia

Animal Biodiversity and Conservation ◽

10.32800/abc.2014.37.0107 ◽

2014 ◽

Vol 37 (2) ◽

pp. 107-114 ◽

Cited By ~ 1

Author(s):

C. Román–Valencia ◽

◽

R. I. Ruiz-C. ◽

D. C. Taphorn ◽

C. García-Alzate ◽

...

Keyword(s):

New Species ◽

River Basin ◽

Endemic Species ◽

Anterior Maxilla ◽

Pectoral Fins ◽

Dorsal Fin ◽

Scale Size ◽

Small Scales ◽

A New Species ◽

Pelvic Fin

Bryconamericus caldasi, a new species, is described from the Middle Cauca River drainage, Andean versant of Colombia. The new species is distinguished from all congeners by: the number of predorsal scales (15–17 vs. 9–14); a wide anterior maxilla tooth, at least twice as wide as the posterior tooth, both of which are pentacuspid (vs. maxilla teeth of same size); a dark lateral stripe overlaid by a peduncular spot; and a reticulated pattern on the sides of body (vs. peduncular spot and other body pigments not superimposed over a dark lateral stripe). We found several differences that distinguish the new species from B. caucanus, the only sympatric congener: number of predorsal median scales (15–17 vs. 12–13); convex predorsal profile (vs. oblique); scale size and number of scale rows at caudal–fin base (small scales arranged in two or more rows vs. large scales in just one row); pectoral fins not or just reaching pelvic fin insertions (vs. pectoral fins reaching posterior to pelvic–fin insertions); and dorsal–fin origin position (at vertical through posterior tip of pelvic–fin vs. at a vertical anterior to pelvic–fin tip).

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A new species of Heptapterus Bleeker 1858 (Siluriformes, Heptapteridae) from the Uruguay River Basin in Misiones, Northeastern Argentina

Zootaxa ◽

10.11646/zootaxa.4299.4.7 ◽

2017 ◽

Vol 4299 (4) ◽

pp. 572 ◽

Cited By ~ 1

Author(s):

GASTÓN AGUILERA ◽

MAURICIO BENITEZ ◽

GUILLERMO ENRIQUE TERÁN ◽

FELIPE ALONSO ◽

JUAN MARCOS MIRANDE

Keyword(s):

New Species ◽

River Basin ◽

Coloration Pattern ◽

Fin Rays ◽

Adipose Fin ◽

Uruguay River ◽

Northeastern Argentina ◽

A New Species ◽

Size Variable ◽

Small Tributary

In this paper we describe Heptapterus mandimbusu sp. n., a new species of heptapterid catfish from a small tributary of the Uruguay River Basin in Misiones-Argentina. This new species is distinguished from all other congeners by the unique coloration pattern with aggregated melanophores scattered on dorsal and lateral surface of body, forming conspicuous size-variable blotches, and the combination of a long interdorsal distance (13.8–18.9 % SL), 14–18 anal-fin rays, short maxillary barbels (52.2–74.5 % HL), and the adipose fin confluent with caudal fin.

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The identity of catfishes identified as Mystus cavasius (Hamilton, 1822) (Teleostei: Bagridae), with a description of a new species from Myanmar

Zootaxa ◽

10.11646/zootaxa.1093.1.1 ◽

2005 ◽

Vol 1093 (1) ◽

pp. 1 ◽

Cited By ~ 1

Author(s):

PROSANTA CHAKRABARTY ◽

HEOK HEE NG

Keyword(s):

New Species ◽

South Asian ◽

Black Spot ◽

Dorsal Spine ◽

Gill Rakers ◽

Dorsal Fin ◽

Northern India ◽

Adipose Fin ◽

River Drainages ◽

A New Species

The identity of South Asian riverine bagrid catfishes usually referred to as Mystus cavasius (Hamilton, 1822) is reviewed. Three species comprise what is currently understood as M. cavasius: M. cavasius s. str. from northern India, M. seengtee from southern India and a new species, M. falcarius, from the Salween and Irrawaddy river drainages in Myanmar and the shorter river drainages in southern Myanmar. Mystus seengtee is resurrected from synonymy with M. cavasius and both species are redescribed. The three species differ from other congeners with a long-based adipose fin in having a combination of a black spot in front of the dorsal-spine base, a dark humeral mark, a body without distinct midlateral stripes, very long maxillary barbels reaching to caudal-fin base, dorsal spine short and feebly serrate, tall dorsal fin, and 13ñ29 gill rakers. These species differ from each other in dorsal fin shape, shape of the predorsal profile, coloration, and number of rakers on the first gill arch.

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