Rivulus uakti sp. n. and R. amanapira sp. n. (Teleostei: Cyprinodontiformes:Rivulidae): two new species from the upper RioNegro, Brazilian Amazon

Zootaxa ◽  
2004 ◽  
Vol 465 (1) ◽  
pp. 1 ◽  
Author(s):  
WILSON J.E.M. COSTA
Keyword(s):  
New Species ◽  
Brazilian Amazon ◽  
Color Pattern ◽  
Species Group ◽  
Caudal Fin ◽  
Unique Pattern ◽  
Unique Color ◽  
Rio Negro ◽  
Two New Species ◽  
Northern Brazil

Rivulus uakti, new species, and R. amanapira, new species, from the upper rio Negro drainage, Amazonian basin, northern Brazil, are described. Both species are members of an assemblage, herein denominated R. atratus species group, that includes R. atratus, R. ornatus, R. rectocaudatus, R. romeri and R. tecminae, and is diagnosed by a unique pattern of frontal squamation and a derived color pattern of infraorbital region. The two new species seems to be closely related to R. romeri and R. tecminae by the absence of dermosphenotic and preopercular canal. Rivulus uakti is similar to R. tecminae and R. altivelis by having long pelvic fins, and differs from them by the fewer scales on the longitudinal series and a distinct female color pattern. Rivulus amanapira, similar to R. tecminae and R. rectocaudatus by having a truncate caudal fin in males, is diagnosed by the higher number of scales on the longitudinal series and unique color pattern of males.

scholarly journals Rivulus kirovskyi, a new killifish from the central Amazon, Brazil (Cyprinodontiformes: Rivulidae)

2004 ◽  
Vol 2 (1) ◽  
pp. 9-12 ◽  
Author(s):  
Wilson J. E. M. Costa
Keyword(s):  
New Species ◽  
Color Pattern ◽  
Caudal Fin ◽  
Unique Pattern ◽  
Central Amazon ◽  
Unique Color ◽  
Rio Negro ◽  
Fin Rays ◽  
Northern Brazil

Rivulus kirovskyi, new species, from the central Amazon, lower rio Negro drainage, northern Brazil, is described. It is a member of an assemblage that includes R. amanapira, R. atratus, R. ornatus, R. rectocaudatus, R. romeri, R. tecminae, and R. uakti, and is diagnosed by a unique pattern of frontal squamation and a derived color pattern of the infraorbital region. Relationships of the new species with other taxa of the group are unclear at the present. It is similar to R. atratus, R. ornatus, and R. romeri in having an apomorphic reduction of anal-fin rays and by the absence of caudal spot in females, and similar to R. amanapira, R. rectocaudatus, R. romeri, R. tecminae, and R. uakti, by the absence of preopercular canal and dermosphenotic. Rivulus kirovskyi differs from all other species of the group by its unique color pattern of the caudal fin in males.

Rivulus uatuman sp. n. (Teleostei: Cyprinodontiformes: Rivulidae): a new miniature killifish from the central Brazilian Amazon

Zootaxa ◽  
2004 ◽  
Vol 696 (1) ◽  
pp. 1 ◽  
Author(s):  
WILSON J.E.M. COSTA
Keyword(s):  
New Species ◽  
Brazilian Amazon ◽  
Color Pattern ◽  
Distal Margin ◽  
Adult Size ◽  
Caudal Fin ◽  
Unique Pattern ◽  
Dorsal Fin

Rivulus uatuman, new species, from the Rio Uatum drainage, central Amazonian basin, Brazil, is described. It is a member of an assemblage including R. amanapira, R. atratus, R. ornatus, R. kirovskyi, R. rectocaudatus, R. romeri, R. tecminae, and R. uakti, diagnosed by a unique pattern of frontal squamation and a derived color pattern of the infraorbital region. It shares three unique derived conditions with R. kirovskyi and R. romeri: small maximum adult size, third anterior supraorbital neuromast posteriorly positioned and absence of vomerine teeth. The new species differs from R. kirovskyi and R. romeri by having the dorsal fin posteriorly positioned, fewer pectoralfin rays, more vertebrae, and a white bar on the distal margin of the caudal fin in males.

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. 

Simpsonichthys nielseni sp. n. (Teleostei: Cyprinodontiformes: Rivulidae): a new annual killifish from the São Francisco River basin, Brazil

Zootaxa ◽  
2005 ◽  
Vol 1039 (1) ◽  
pp. 57
Author(s):  
WILSON J.E.M. COSTA
Keyword(s):  
New Species ◽  
River Basin ◽  
Color Pattern ◽  
Species Group ◽  
Caudal Fin ◽  
Light Blue ◽  
Sao Francisco River ◽  
Annual Killifish ◽  
Unique Color ◽  
São Francisco River

Simpsonichthys nielseni, new species, is described from the middle São Francisco River basin, Brazil. It is a member of the S. notatus species group (which includes S. notatus, S. stellatus, S. similis, S. rufus, S. trilineatus, S. auratus, and S. radiosus), which is characterized by a derived pattern of frontal squamation. The new species differs from congeners by possessing a unique color pattern of the caudal fin in males, which includes six or seven light blue stripes diverging from the fin base, terminating in sharp tips on the fin margins. Simpsonichthys nielseni and S. stellatus share an apomorphic color pattern consisting of elongated light spots alternating with black zones on the dorsalfin base in males.

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 Two new species of the Hypostomus cochliodon group (Siluriformes: Loricariidae) from the rio Negro basin in Brazil

2010 ◽  
Vol 8 (1) ◽  
pp. 39-48 ◽  
Author(s):  
Pedro Hollanda Carvalho ◽  
Flávio C.T Lima ◽  
Cláudio H Zawadzki
Keyword(s):  
New Species ◽  
Color Pattern ◽  
The Body ◽  
Unique Color ◽  
Rio Negro ◽  
Black Spots ◽  
Two New Species ◽  
Rio Negro Basin

Two new species of Hypostomus are described from the middle and upper rio Negro in Brazil. They are assigned to the Hypostomus cochliodon group (sensu Armbruster, 2003) by possessing few spoon-shaped teeth, and dentary angle averaging less than 80º. Hypostomus kopeyaka is described from the rio Tiquié, a tributary of the rio Uaupés, upper rio Negro basin, presents a unique color pattern among the Hypostomus species belonging to the Hypostomus cochliodon group, consisting of conspicuously horizontally elongated, closely-set black spots over the entire dorsal and lateral surfaces of the body. Hypostomus weberi is described from the middle rio Negro and can be distinguished from all remaining Hypostomus species belonging to the Hypostomus cochliodon group by possessing a unique color pattern consisting in large, rounded, widelyspaced black spots over body and fins.

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 new species of Farlowella (Siluriformes: Loricariidae) of the F. nattereri species-group from the rio Xingu basin, Mato Grosso, Brazil, with comments on Farlowella jauruensis , a poorly-known species from the upper rio Paraguai basin

2016 ◽  
Vol 14 (3) ◽  
Author(s):  
Gustavo A. Ballen ◽  
Murilo N. L. Pastana ◽  
Luiz A. W. Peixoto
Keyword(s):  
New Species ◽  
Geographic Distribution ◽  
Color Pattern ◽  
Species Group ◽  
Caudal Fin ◽  
Mato Grosso ◽  
Fin Rays ◽  
Plate Morphology ◽  
A New Species

ABSTRACT A new species of Farlowella is described from eighteen specimens collected in the upper rio Xingu basin, Mato Grosso State, Brazil. The new species is a member of the Farlowella nattereri species-group and can be distinguished from other members of the group, with exception of Farlowella jauruensis , by exhibiting a proportionally shorter snout. The new species is distinguished from F. jauruensis by differences on the cleithrum and plate morphology, by counts of pelvic and caudal-fin rays, and by the color pattern of the snout. The discovery of new lots of F. jauruensis , a species so far known only from the holotype, is also herein reported. This discovery represents a considerable expansion of the geographic distribution and of the number of known specimens of F . jauruensis .

scholarly journals A new species of Microglanis(Siluriformes: Pseudopimelodidae) from the upper rio Tocantins basin, Goiás State, Central Brazil

2014 ◽  
Vol 12 (1) ◽  
pp. 81-87 ◽  
Author(s):  
Oscar Akio Shibatta
Keyword(s):  
New Species ◽  
Lateral Line ◽  
Posterior Margin ◽  
Color Pattern ◽  
Occipital Region ◽  
Caudal Fin ◽  
Central Brazil ◽  
Unique Color ◽  
A New Species ◽  
Pelvic Fin

A new species of Microglanis is described from the upper rio Tocantins basin, Barro Alto, Goiás State, Brazil. This species is distinguished from the others by presenting a unique color pattern, consisting of round spots in the flank between the larger dark brown blotches. Moreover, it can be distinguished by the combination of the following features: caudal fin emarginate, the upper lobe slightly larger than the lower, lateral line relatively long, reaching vertical through posterior margin of the pelvic fin, and light stripe on supra-occipital region absent or very narrow and with irregular shape.

scholarly journals Comments on the genus Diplura C. L. Koch, 1850, with description of two new species (Araneae, Mygalomorphae, Dipluridae)

ZooKeys ◽  
2018 ◽  
Vol 771 ◽  
pp. 57-71
Author(s):  
Denis Rafael Pedroso ◽  
Alessandro Ponce De Leão Giupponi ◽  
Renner Luiz Cerqueira Baptista
Keyword(s):  
New Species ◽  
Color Pattern ◽  
The State ◽  
Diagnostic Characters ◽  
Two New Species ◽  
Northern Brazil

Two new species of Diplura C. L. Koch 1850 are described from Brazil: Dipluramapinguari sp. n., from the state of Rondônia in southeastern Amazonia, northern Brazil, and Diplurarodrigoi sp. n., known from southeastern and central west regions of Brazil. Diplurarodrigoi sp. n. is morphologically similar to D.lineata (Lucas, 1857), D.sanguinea (F. O. Pickard-Cambridge, 1896), and D.mapinguari sp. n. Comments on diagnostic characters of Diplura are included. The synonymy of D.maculata (Mello-Leitão, 1927) with D.catharinensis (Mello-Leitão, 1923) is corroborated. A classification of color pattern of the dorsum of the abdomen is given.

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