A New Species of Miniature Fish of the GenusMicrophilypnus(Gobioidei: Eleotridae) from the Upper Rio Negro Basin, Amazonas, Brazil

Copeia ◽  
2018 ◽  
Vol 106 (1) ◽  
pp. 49-55 ◽  
Author(s):  
Rodrigo A. Caires ◽  
Mônica Toledo-Piza
Keyword(s):  
New Species ◽  
Rio Negro ◽  
Rio Negro Basin ◽  
A New Species

scholarly journals A new species of Rineloricaria (Siluriformes: Loricariidae: Loricariinae) from rio Daraá, rio Negro basin, Amazon, Brazil

2008 ◽  
Vol 6 (3) ◽  
pp. 339-346 ◽  
Author(s):  
Lúcia H. Rapp Py-Daniel ◽  
Ilana Fichberg
Keyword(s):  
New Species ◽  
Pectoral Fin ◽  
Variable Size ◽  
Lower Lip ◽  
Rio Negro ◽  
Fin Rays ◽  
Amazonas State ◽  
Rio Negro Basin ◽  
A New Species ◽  
Pectoral Fin Rays

Rineloricaria daraha, new species, is described from the rio Daraá, tributary of rio Negro, northwestern Amazonas State, Brazil. The new species is diagnosed by having seven branched pectoral-fin rays, finger-like papillae on the lower lip, a large multi-angular preanal plate, and at least four quadrangular plates of variable size surrounding the preanal plate. The new species is known only from rio Daraá and its waterfalls.

A New Species of Moenkhausia Eigenmann, 1903 (Characiformes, Characidae) from the Upper Rio Negro Basin, Brazil

Copeia ◽  
2019 ◽  
Vol 107 (2) ◽  
pp. 232
Author(s):  
Isabel M. Soares ◽  
Flávio C. T. Lima ◽  
Douglas A. Bastos ◽  
Lucia H. Rapp Py-Daniel
Keyword(s):  
New Species ◽  
Rio Negro ◽  
Rio Negro Basin ◽  
A New Species

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.

A new Moenkhausia (Actinopterygii: Characiformes: Characidae) from the upper rio Negro basin, Brazil

Zootaxa ◽  
2018 ◽  
Vol 4461 (1) ◽  
pp. 69 ◽  
Author(s):  
FLÁVIO C.T. LIMA ◽  
ISABEL M. SOARES
Keyword(s):  
New Species ◽  
Lateral Line ◽  
Color Pattern ◽  
The Body ◽  
Head Length ◽  
Rio Negro ◽  
Dorsal Portion ◽  
Rio Negro Basin ◽  
A New Species

A new species of Moenkhausia is described from the upper rio Negro basin, Amazonas, Brazil. The new species is distinguished from all congeners, except M. agnesae, by presenting a color pattern characterized by the presence of two irregularly-shaped humeral blotches, and the presence of dark longitudinal stripes on the dorsal portion of the body. The new species can be readily separated from M. agnesae by presenting longitudinal stripes straight and more conspicuous dorsally, humeral blotches contacting each other, 2–3 tricuspid maxillary teeth, 32–35 lateral-line scales, and length of maxilla 45.3–51.0% in head length. 

scholarly journals A new species of leaffish Polycentrus Müller & Troschel, 1849 (Percomorpha: Polycentridae) from the rio Negro, Brazil

2014 ◽  
Vol 12 (4) ◽  
pp. 747-753 ◽  
Author(s):  
Daniel Pires Coutinho ◽  
Wolmar Benjamin Wosiacki
Keyword(s):  
New Species ◽  
Posterior Margin ◽  
Lower Edge ◽  
Posterior Edge ◽  
Pectoral Fin ◽  
Dorsal Fin ◽  
Rio Negro ◽  
Ventral Edge ◽  
A New Species

A new species of Polycentrusis described from the rio Negro, in Brazil. It is distinguished from P. schomburgkii by the presence of two dark postocular and one subocular band, all smaller than orbital diameter, blunt snout, isognathous mouth, reduction of the serrations on the lower edge of the lacrimal-spines ranging from zero to two tiny spines at the posterior end, intensely serrated edge of the interopercle, fully serrated posterior edge of the vertical arm of the preopercle, presence of five pungent opercular spines, subopercle broadly serrated along most of its posterior ventral edge, presence of serrations dorsally on the posterior margin of the cleithrum, fourth ray of pectoral fin reaching the vertical through the anal-fin origin, 19-21 predorsal scales, 19-20 scales on dorsal-fin base, 12-14 scales on anal-fin base, and absence of a median opercular blotch.

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.

scholarly journals A taxonomic review of the species of CharaxScopoli, 1777 (Teleostei: Characidae: Characinae) with description of a new species from the rio Negro bearing superficial neuromasts on body scales, Amazon basin, Brazil

2014 ◽  
Vol 12 (2) ◽  
pp. 193-228 ◽  
Author(s):  
Naércio A. Menezes ◽  
Carlos Alberto S. de Lucena
Keyword(s):  
New Species ◽  
Geographic Distribution ◽  
Amazon Basin ◽  
Junior Synonym ◽  
Museum Collections ◽  
Taxonomic Review ◽  
Rio Negro ◽  
Three New Species ◽  
A New Species ◽  
Pelvic Fin

The species of Charaxwere reviewed by Lucena (1987) who a little later (1989) added three new species to the genus. Examination of recently collected specimens from museum collections documented the more extensive geographic distribution for most species and revealed the existence of a new species in which superficial neuromasts were discovered and are herein described. These skin structures were also detected in C. metae Eigenmann, 1922. Anal- and pelvic-fin hooks previously observed only on the anal-fin of one species of the genus are described herein in some other species. Charax unimaculatus Lucena is considered a junior synonym of C. michaeli Lucena. All the species are redescribed and the new species described.

scholarly journals A new species of Bosminopsis (Crustacea, Cladocera) from the Rio Negro ()

1976 ◽  
Vol 6 (1) ◽  
pp. 109-114 ◽  
Author(s):  
Gerd-Oltmann Brandorff
Keyword(s):  
New Species ◽  
Rio Negro ◽  
A New Species

Abstract It is described a new species Bosminopsis negrensis from the lower Rio Negro.

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