Wallace’s Pike Cichlid Gets a Name after 160 Years: A New Species of Cichlid Fish (Teleostei: Cichlidae) from the Upper Rio Negro in Brazil

Copeia ◽  
2015 ◽  
Vol 103 (3) ◽  
pp. 512-519 ◽  
Author(s):  
Sven O. Kullander ◽  
Henrique R. Varella
Keyword(s):  
New Species ◽  
Cichlid Fish ◽  
Rio Negro ◽  
A New Species

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.

scholarly journals Gyrodactylus magadiensis n. sp. (Monogenea, Gyrodactylidae) parasitising the gills of Alcolapia grahami (Perciformes, Cichlidae), a fish inhabiting the extreme environment of Lake Magadi, Kenya

Parasite ◽  
2019 ◽  
Vol 26 ◽  
pp. 76
Author(s):  
Quinton Marco Dos Santos ◽  
John Ndegwa Maina ◽  
Annemariè Avenant-Oldewage
Keyword(s):  
New Species ◽  
Cichlid Fish ◽  
Soda Lake ◽  
Its Region ◽  
Extreme Environment ◽  
Molecular Techniques ◽  
Diurnal Fluctuation ◽  
Lake Magadi ◽  
A New Species ◽  
Alcolapia Grahami

A new species of Gyrodactylus von Nordmann, 1832 is described from the gills of Alcolapia grahami, a tilapian fish endemic to Lake Magadi. This alkaline soda lake in the Rift Valley in Kenya is an extreme environment with pH as high as 11, temperatures up to 42 °C, and diurnal fluctuation between hyperoxia and virtual anoxia. Nevertheless, gyrodactylid monogeneans able to survive these hostile conditions were detected from the gills the Magadi tilapia. The worms were studied using light microscopy, isolated sclerites observed using scanning electron microscopy, and molecular techniques used to genetically characterize the specimens. The gyrodactylid was described as Gyrodactylus magadiensis n. sp. and could be distinguished from other Gyrodactylus species infecting African cichlid fish based on the comparatively long and narrow hamuli, a ventral bar with small rounded anterolateral processes and a tongue-shaped posterior membrane, and marginal hooks with slender sickles which are angled forward, a trapezoid to square toe, rounded heel, a long bridge prior to reaching marginal sickle shaft, and a long lateral edge of the toe. The species is also distinct from all other Gyrodactylus taxa based on the ITS region of rDNA (ITS1–5.8s–ITS2), strongly supporting the designation of a new species. These findings represent the second record of Gyrodactylus from Kenya, with the description of G. magadiensis bringing the total number of Gyrodactylus species described from African cichlids to 18.

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.

Retroculus acherontos, a new species of cichlid fish (Teleostei) from the Rio Tocantins basin

Zootaxa ◽  
2015 ◽  
Vol 3973 (2) ◽  
pp. 369
Author(s):  
MARIA ISABEL LANDIM ◽  
CRISTIANO R. MOREIRA ◽  
CARLOS A. FIGUEIREDO
Keyword(s):  
New Species ◽  
Cichlid Fish ◽  
A New Species

scholarly journals Crenicichla hu, a new species of cichlid fish (Teleostei: Cichlidae) from the Paraná basin in Misiones, Argentina

Zootaxa ◽  
2010 ◽  
Vol 2537 (1) ◽  
pp. 33 ◽  
Author(s):  
LUBOMÍR PIÁLEK ◽  
OLDŘICH ŘÍČAN ◽  
JORGE CASCIOTTA ◽  
ADRIANA ALMIRÓN
Keyword(s):  
New Species ◽  
Cichlid Fish ◽  
Color Pattern ◽  
Left Hand ◽  
Black And White ◽  
Dorsal Fin ◽  
La Plata Basin ◽  
Molecular Phylogenetic ◽  
Misiones Province ◽  
A New Species

A new species of Crenicichla Heckel, C. hu, is described from the arroyo Piray–Miní, a left-hand tributary of the río Paraná, Misiones province, Argentina. This new species is easily distinguished from its congeners in the La Plata basin and adjacent coastal rivers by the dark coloration (dark grey or dark brown to black), a color pattern consisting of 7 to 9 black irregular blotches on the flank, and 47–54 scales in the E1 row. Adult females have dorsal fin with an irregular color pattern formed by wide black and white longitudinal stripes and blotches. In addition to standard morphological comparisons, a brief molecular phylogenetic analysis of Crenicichla species from the province of Misiones is also introduced.

A New Species of Dwarf Cichlid Fish with Reversed Sexual Dichromatism from Lac Mai-ndombe, Zaïre

Copeia ◽  
1984 ◽  
Vol 1984 (1) ◽  
pp. 82 ◽  
Author(s):  
Donald J. Stewart ◽  
Tyson R. Roberts
Keyword(s):  
New Species ◽  
Cichlid Fish ◽  
Sexual Dichromatism ◽  
A New Species
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