scholarly journals Corydoras tukano, a new species of corydoradine catfish from the rio Tiquié, upper rio Negro basin, Brazil (Ostariophysi: Siluriformes: Callichthyidae)

2003 ◽  
Vol 1 (2) ◽  
pp. 83-91 ◽  
Author(s):  
Marcelo R. Britto ◽  
Flávio C.T. Lima
Keyword(s):  
New Species ◽  
Color Pattern ◽  
New Taxon ◽  
Caudal Fin ◽  
The Third ◽  
Dorsal Fin ◽  
Rio Negro ◽  
Adipose Fin ◽  
Rio Negro Basin ◽  
A New Species

A new Corydoras species from the rio Tiquié, upper rio Negro system, Amazonas, Brazil, is described. This taxon was previously referred to as "Corydoras species 'Asher'", "Corydoras cf. reynoldsi", and "Corydoras aff. reynoldsi" in the aquarist literature. The new taxon can be distinguished from all its congeners, except Corydoras reynoldsi and C. weitzmani, by its color pattern, consisting of three large, dark blotches, the first one ("mask") on the head, across the eye; the second one on the trunk at the level of dorsal fin; and the third one on the trunk at the level of the adipose fin. It can be distinguished from Corydoras reynoldsi mainly by the development of trunk blotches; and from C. weitzmani by the presence of a dusky saddle between the dorsal and adipose fins, the second trunk blotch extending vertically from the adipose-fin base to the anal-fin base, and the presence of four dark stripes in the caudal fin.

scholarly journals Microglanis carlae, a new species of bumblebee catfish (Siluriformes: Pseudopimelodidae) from the río Paraguay basin in Paraguay

2008 ◽  
Vol 6 (3) ◽  
pp. 425-432 ◽  
Author(s):  
Héctor S. Vera Alcaraz ◽  
Weferson J. da Graça ◽  
Oscar A. Shibatta
Keyword(s):  
New Species ◽  
Species Complex ◽  
Anterior Margin ◽  
Color Pattern ◽  
Caudal Peduncle ◽  
Dorsal Fin ◽  
Fin Ray ◽  
Pectoral Spine ◽  
Adipose Fin ◽  
A New Species

Microglanis carlae, new species, is described from the río Paraguay basin and distinguished from its congeners by the following combination of characters: paired and anal fins mottled or with thin faint bands, trunk with dark-brown saddles, anterior margin of pectoral spine with serrations retrorse proximally and antrorse distally, tip of pectoral spine as a distinct bony point, continuous portion of lateral line reaching vertical through last dorsal-fin ray, caudal peduncle with irregularly shaped, faint to dark blotch, maxillary barbel surpassing vertical through dorsal-spine origin, and dark bar on posterior flank continuous from base of adipose fin to that of anal fin. The new species is included in the Microglanis parahybae species complex on the basis of color pattern.

scholarly journals New species of Cyphocharax (Characiformes: Curimatidae) from the upper rio Negro, Amazon basin

2014 ◽  
Vol 12 (2) ◽  
pp. 327-332 ◽  
Author(s):  
Bruno F. Melo ◽  
Richard P. Vari
Keyword(s):  
New Species ◽  
Amazon Basin ◽  
Caudal Peduncle ◽  
Caudal Fin ◽  
Rio Negro ◽  
Fin Rays ◽  
Dark Pigmentation ◽  
Northern Brazil ◽  
Adipose Fin ◽  
A New Species

A new species of Cyphocharax, Curimatidae, apparently endemic to the blackwater upper rio Negro of the Amazon basin in northern Brazil, is described.The new species is readily distinguished from its congeners by the presence of a distinctly longitudinally elongate, posteriorly vertically expanding patch of dark pigmentation along the midlateral surface of the caudal peduncle, with the patch extending from the base of the middle caudal-fin rays anteriorly past the vertical through the posterior terminus of the adipose fin. The new species additionally differs from all congeners in details of body and fin pigmentation and meristic and morphometric ratios. Evidence for the assignment of the species to Cyphocharax and the occurrence of other species of the Curimatidae apparently endemic to the upper rio Negro catchment is discussed.

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

Zootaxa ◽  
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. 

A new species of Hemigrammus Gill 1858 (Characiformes: Characidae) from the upper Rio Negro, Amazon basin, Brazil

Zootaxa ◽  
2019 ◽  
Vol 4555 (3) ◽  
pp. 407 ◽  
Author(s):  
LAIS REIA ◽  
RICARDO C. BENINE
Keyword(s):  
New Species ◽  
Amazon Basin ◽  
Color Pattern ◽  
Caudal Fin ◽  
Dark Stripe ◽  
Unique Color ◽  
Rio Negro ◽  
Vertical Scale ◽  
Fin Rays ◽  
A New Species

A new species of Hemigrammus is described from the upper Rio Negro, Amazon basin, Brazil. The new species is distinguished from all congeners by its unique color pattern consisting of a single humeral blotch clearly spaced from a conspicuous midlateral dark stripe, which extends from fifth or sixth anteriormost vertical scale row to the basis of the middle caudal-fin rays. Comments on its putative relationships are provided. 

scholarly journals A new species of bumblebee catfish of the genus Microglanis (Siluriformes: Pseudopimelodidae) from the upper rio Paraguay basin, Brazil

2016 ◽  
Vol 14 (3) ◽  
Author(s):  
Oscar Akio Shibatta
Keyword(s):  
New Species ◽  
Lateral Line ◽  
Anterior Margin ◽  
Color Pattern ◽  
Dorsal Region ◽  
Anterior Nostril ◽  
Dorsal Fin ◽  
Light Area ◽  
Adipose Fin ◽  
A New Species

ABSTRACT A new species of Microglanis from upper rio Paraguay basin is described. The species differs from congeners by the following combination of characters: deeply forked caudal fin with pointed lobes, bifurcated hook between antrorse and retrorse hooks on anterior margin of pectoral-fin spine, lateral line relatively long, surpassing the vertical through end of dorsal fin but not reaching adipose fin, color pattern of dorsal region of head dark brown with a restrict thin light area between anterior nostril and eye, broad light stripe on supraoccipital region.

scholarly journals Description of a new species of Ituglanis (Siluriformes: Trichomycteridae) from Serra dos Carajás, rio Tocantins basin

2012 ◽  
Vol 10 (3) ◽  
pp. 547-554 ◽  
Author(s):  
Wolmar B. Wosiacki ◽  
Guilherme M. Dutra ◽  
Marina B Mendonça
Keyword(s):  
New Species ◽  
Color Pattern ◽  
Caudal Fin ◽  
Dorsal Fin ◽  
Trunk Line ◽  
Fin Rays ◽  
The Relationship ◽  
A New Species

A new species of Ituglanis is described from the rio Tocantins basin, State of Pará, Brazil. Ituglanis ina, new species, is distinguished from its congeners by the presence of a dark vertical bar over the base of the caudal-fin rays (vs. no bars over caudal-fin base); and by the presence of a middle trunk line of tiny neuromasts extending along the flank until the vertical through the dorsal fin, or near the caudal-fin base (vs. no middle trunk line of tiny neuromasts). Ituglanis ina can be further distinguished by a combination of characters related to color pattern and morphology. Comments on the relationship between Ituglanis species are presented.

scholarly journals Astyanax ajuricaba: a new species from the Amazon basin in Brazil (Characiformes: Characidae)

2009 ◽  
Vol 7 (2) ◽  
pp. 169-174 ◽  
Author(s):  
Manoela M. F. Marinho ◽  
Flávio C. T. Lima
Keyword(s):  
New Species ◽  
Amazon Basin ◽  
Color Pattern ◽  
Caudal Fin ◽  
Unique Color ◽  
Rio Negro ◽  
Fin Rays ◽  
A New Species

A new Astyanax species is described from several localities in the rio Negro, rio Solimões and lower rio Tapajós basins, Amazon basin, Brazil. The new species is distinguished from all remaining characids by its unique color pattern consisting of the combination of presence of a conspicuous, narrow dark midlateral stripe, a well-developed vertically-elongated dark humeral spot, and upper caudal-fin lobe and middle caudal-fin rays dark, with a rounded clear ocellated spot present at anterior third of caudal-fin lobe.

scholarly journals Corydoras ortegai, a new species of corydoradine catfish from the lower río Putumayo in Peru (Ostariophysi: Siluriformes: Callichthyidae)

2007 ◽  
Vol 5 (3) ◽  
pp. 293-300 ◽  
Author(s):  
Marcelo R. Britto ◽  
Flávio C. T. Lima ◽  
Max H. Hidalgo
Keyword(s):  
New Species ◽  
Amazon Basin ◽  
Distribution Patterns ◽  
Sister Species ◽  
Similar Distribution ◽  
Caudal Fin ◽  
Dorsal Fin ◽  
Lateral Body ◽  
Adipose Fin ◽  
A New Species

A new species of Corydoras, C. ortegai, is described from tributaries of the lower course of río Putumayo in Peru, close to the border with Brazil and Colombia. The new species seems to be related to Corydoras reynoldsi, C. weitzmani, C. panda, and C. tukano, all of which share a pattern composed of uniform light ground color on body, dark bar ("mask") across orbit, and one or two large rounded blotches midlaterally on trunk. Corydoras ortegai is easily distinguished from these species, except C. panda, mainly by the absence of a midlateral trunk blotch at the dorsal-fin level, and the rounded shape of the midlateral trunk blotch at the adipose-fin level. Corydoras ortegai differs from C. panda by its greater number of lateral body plates, lack of dorsal-fin blotch, scattered chromatophores surrounding midregion of cleithrum, caudal fin with series of small blotches restricted to rays, slenderer body, and narrower intercleithral area. Corydoras ortegai belongs to a putatively monophyletic assemblage of Corydoras that occurs mainly in the Western Amazon basin, C. tukano excepted. The occurrence of Corydoras tukano in the rio Tiquié (upper Negro basin) and its putative sister species, C. ortegai, in the western Amazon, together with similar distribution patterns shared by other groups of fishes, suggest a biogeographic relationship between these areas.

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. 

scholarly journals A new species of Pimelodus LaCépède, 1803 (Siluriformes: Pimelodidae) from the rio São Francisco drainage, Brazil

2006 ◽  
Vol 4 (4) ◽  
pp. 411-418 ◽  
Author(s):  
Frank Raynner V. Ribeiro ◽  
Carlos Alberto S. de Lucena
Keyword(s):  
New Species ◽  
Gill Rakers ◽  
Caudal Fin ◽  
Dorsal Fin ◽  
Adipose Fin ◽  
A New Species

Pimelodus pohli, new species, is described from the rio São Francisco drainage. It differs from congeners by the following characters in combination: adults with dark spots on anterodorsal region of body and young specimens (up to 100 mm SL) with three rows of dark spots laterally on body; comparatively long adipose fin, more than one third of the distance between posterior end of dorsal fin base and the vertical through posterior end of anal-fin base (21.8-26.2% SL); lips poorly developed; 20-25 gill rakers; and maxillary barbels slightly surpassing the caudal-fin base. A key to the species of Pimelodus of the rio São Francisco drainage is presented.

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