A new species of the catfish genus Trichomycterus from the La Plata River basin, southern Brazil, with comments on its putative phylogenetic position (Siluriformes: Trichomycteridae)

Zootaxa ◽  
2012 ◽  
Vol 3327 (1) ◽  
pp. 33 ◽  
Author(s):  
ALÉSSIO DATOVO ◽  
MURILO CARVALHO ◽  
JULIANO FERRER
Keyword(s):  
New Species ◽  
River Basins ◽  
Color Pattern ◽  
Skin Layer ◽  
Phylogenetic Position ◽  
Diverse Group ◽  
Southern Brazil ◽  
Caudal Peduncle ◽  
Unique Color ◽  
A New Species

The genus Trichomycterus is a highly diverse group of Neotropical catfishes that encompass almost 60% of all the cur-rently recognized species of the Trichomycteridae. A new species of this genus, T. perkos, is herein described from tribu-taries of the Paranapanema and Uruguai River basins, southern Brazil. The new species exhibits a remarkable ontogeneticchange in its pigmentation, having a unique color pattern when adult. The adult pigmentation consists of three wide darkbrown stripes, located in an inner skin layer of trunk and caudal peduncle, combined with a superficial light brown freck-led pattern on the dorsum and caudal peduncle. Small, presumably juvenile specimens lack the superficial freckles butalready have the dark stripes, thus resembling the color pattern of a few other congeners. Nevertheless, several unequiv-ocal morphological features distinguish both juveniles and adults of T. perkos from these congeners. In spite of the diffi-culties in estimating phylogenetic relationships within Trichomycterus, the new species is tentatively proposed as being the sister-taxon of a small group of species composed by T. crassicaudatus, T. igobi, and T. stawiarski.

scholarly journals A new species of Ituglanis (Siluriformes: Trichomycteridae) from the rio Uruguai basin, southern Brazil

2017 ◽  
Vol 15 (3) ◽  
Author(s):  
Juliano Ferrer ◽  
Laura M. Donin
Keyword(s):  
New Species ◽  
Outer Layer ◽  
Mitochondrial Gene ◽  
Color Pattern ◽  
The Body ◽  
Southern Brazil ◽  
Unique Color ◽  
Pampa Biome ◽  
Genetic Sequences ◽  
A New Species

ABSTRACT A new species of Ituglanis associated to the grasslands of the Pampa biome is described from the rio Uruguai basin, southern Brazil. The new species is distinguished from its congeners by the low number of ribs and by a unique color pattern composed of an outer layer with scattered round black blotches equivalent in size to the eye circumference over a reddish brown background on the lateral surface of the body. We provide the genetic sequences of the mitochondrial gene Cytochrome c Oxydase subunit I (COI) for three of the paratypes and discuss aspects about the recent discovery of the new species.

scholarly journals A new species of the Hypostomus cochliodongroup (Siluriformes: Loricariidae) from the rio Aripuanã basin in Brazil

2014 ◽  
Vol 12 (1) ◽  
pp. 43-51 ◽  
Author(s):  
Cláudio H. Zawadzki ◽  
Pedro Hollanda Carvalho
Keyword(s):  
New Species ◽  
Color Pattern ◽  
Proximal Region ◽  
The Body ◽  
Dorsal Region ◽  
Caudal Peduncle ◽  
Mato Grosso ◽  
Unique Color ◽  
A New Species ◽  
Rio Madeira

A new species of Hypostomus, H. dardanelos, is described from the rio Aripuanã basin, a southern tributary to the rio Madeira, in northern Mato Grosso State, Brazil. The new species is assigned to the Hypostomus cochliodon group by the possession of few teeth, spoon-shaped teeth, angle between dentaries usually less than 80°, and by the absence of a notch between hyomandibular and the metapterygoid. The new species can be diagnosed from its congeners by its unique color pattern of yellowish-brown ground color covered by well-defined dark spots of relatively equal size, evenly spaced and moderately set along the dorsal region of the body and fins, except on the ventrolateral region of the caudal peduncle and proximal region of anal and caudal fins, which are devoid of spots. The new species is further diagnosed by having teeth with very small lateral cusp, fused to the mesial one and almost imperceptible; by the absence of medial buccal papillae, and by nuptial odontodes all along the body (odontodes more pronounced in some few larger specimens).

scholarly journals Oligosarcus jacuiensis (Characiformes: Characidae), a new species from the Uruguay and Jacuí River basins, southern Brazil

2010 ◽  
Vol 8 (3) ◽  
pp. 649-653 ◽  
Author(s):  
Naércio Aquino Menezes ◽  
Alexandre Cunha Ribeiro
Keyword(s):  
New Species ◽  
Rio Grande ◽  
River Basins ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
Horizontal Scale ◽  
Caudal Peduncle ◽  
Uruguay River ◽  
A New Species ◽  
Pelvic Fin

The new species herein described, collected in the Jacuí and Uruguay River basins, Rio Grande do Sul, Brazil, can be distinguished from the already known species of the genus, but Oligosarcus jenynsii, O. perdido, O. acutirostris, O. solitarius and O. hepsetus, by the number of perforated lateral line scales. It shares with the first two species the absence of a premaxillary foramen, present in the last three species and differs from O. jenynsii by having a smaller orbital diameter and the tip of the pectoral fin failing to reach the pelvic-fin origin, and from O. perdido by the presence of more horizontal scale rows around the caudal peduncle.

Hyphessobrycon rheophilus, a new species from rapids of the Amazon and Orinoco river basins (Characiformes: Characidae: Stethaprioninae)

Zootaxa ◽  
2019 ◽  
Vol 4712 (4) ◽  
pp. 561-575 ◽  
Author(s):  
WILLIAN M. OHARA ◽  
TULIO F. TEIXEIRA ◽  
JUAN G. ALBORNOZ-GARZÓN ◽  
J. MARCOS MIRANDE ◽  
FLÁVIO C. T. LIMA
Keyword(s):  
New Species ◽  
Lateral Line ◽  
River Basins ◽  
The Other ◽  
Phylogenetic Position ◽  
Caudal Peduncle ◽  
Rio Negro ◽  
Fin Rays ◽  
A New Species ◽  
Rio Madeira

A new species from rapids of Rio Aripuanã, Rio Madeira basin, in Brazil, and from the same type of habitat in the upper Rio Negro and upper Rio Orinoco basins in Brazil, Colombia, and Venezuela is described and assigned to the genus Hyphessobrycon. The new species presents an interrupted lateral line plus a single perforated scale on caudal peduncle and a small dark blotch on dorsal procurrent caudal-fin rays, features not found in the other species of Hyphessobrycon. Comments on the phylogenetic position of the new species, its rheophilic habits, and the biogeographic implications of its distribution are presented. 

Poecilia (Pamphorichthys) akroa, a new poeciliid species (Cyprinodontiformes: Poeciliidae) from the Rio Tocantins basin, Brazil

Zootaxa ◽  
2018 ◽  
Vol 4461 (3) ◽  
pp. 438
Author(s):  
CARLOS AUGUSTO FIGUEIREDO ◽  
CRISTIANO R. MOREIRA
Keyword(s):  
New Species ◽  
Sensory System ◽  
Color Pattern ◽  
Distal Portion ◽  
The Body ◽  
Caudal Peduncle ◽  
Posterior Portion ◽  
Anterior Branch ◽  
Black Blotch ◽  
A New Species

A new species, Poecilia (Pamphorichthys) akroa, is described from the Rio Tocantins drainage, Brazil. The new species differs from the remaining species of the genus by the possession of 10 or 11 pectoral-fin rays, entire preopercular ramus and posterior portion of the supraorbital ramus of the cephalic sensory system enclosed in canals, a faint longitudinal band along the body, a single gonapophysis, a homogeneous reticulate color pattern on sides of body, urogenital region of females heavily pigmented, distalmost segments of the anterior branch (4a) of the fourth gonopodial ray fused into an elongated segment turned anteriorly, subdistal segments of anterior branch (5a) of fifth gonopodial ray simple, without anterior (ventral) projections, dorsal fin with pigmentation at its distal portion and with a basal black blotch, and chromatophores more concentrated on the posterior margin of the mid-ventral scale series of the caudal peduncle and ventrolateral margin of the adjacent scales forming a series of rhombi posterior to anal 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 Parotocinclus halbothi, a new species of small armored catfish (Loricariidae: Hypoptopomatinae), from the Trombetas and Marowijne River basins, in Brazil and Suriname

2014 ◽  
Vol 12 (1) ◽  
pp. 27-33 ◽  
Author(s):  
A. Pablo Lehmann ◽  
Henrique Lazzarotto ◽  
Roberto E. Reis
Keyword(s):  
New Species ◽  
Body Shape ◽  
Ventral Surface ◽  
River Basins ◽  
Color Pattern ◽  
Similar Species ◽  
Morphometric Features ◽  
Adipose Fin ◽  
The Guianas ◽  
A New Species

Parotocinclus halbothiis described as a new species from the Trombetas and Marowijne river basins, in Brazil and Suriname. The new species is distinguished from its congeners in the Guianas, Orinoco, and Amazon basins by details of color pattern, form and arrangement of bony plates, body shape, and morphometric features. It is distinguished from all other species of Parotocinclusby the elongation of the canal cheek plate on the ventral surface of head posteriorly to contact the cleithrum. The new species is differentiated from Parotocinclus collinsae, the most similar species in terms of color pattern, by the small, circular, median abdominal plates, the poorly developed preanal shield with two or three plates, and by having the adipose fin rudimentary. This new species is one of the smallest loricariid catfishes known to date.

A new species of Zoniopoda Stål (Orthoptera: Acridoidea: Romaleidae) from Argentina and its phylogenetic position within the genus

Zootaxa ◽  
2011 ◽  
Vol 2913 (1) ◽  
pp. 27 ◽  
Author(s):  
MARTINA E. POCCO ◽  
GONZALO D. RUBIO ◽  
M. MARTA CIGLIANO
Keyword(s):  
New Species ◽  
Cladistic Analysis ◽  
Type Specimen ◽  
Morphological Characters ◽  
Color Pattern ◽  
Species Group ◽  
The Body ◽  
Phylogenetic Position ◽  
Median Carina ◽  
A New Species

A new species of the romaleid grasshopper genus Zoniopoda Stål (Romaleidae: Romaleini) is described and illustrated from the Sierras Chicas of Córdoba Province, central Argentina. A cladistic analysis based on morphological characters indicates that the genus Zoniopoda constitutes a monophyletic group and that Zoniopoda serrana n. sp. must be assigned to Iheringi species group based on synapomorphies of the pronotum and body color. The new species is similar to Z. similis Bruner from Paraguay, Bolivia and Brazil, from which it can be distinguished by the color pattern of the body, shape of the pronotal dorso-median carina and characters of the male terminalia and epiphallus. This paper has been formatted with embedded links to images of the type specimen, maps based on georeferenced specimen data for the genus and an updated key to the species of Zoniopoda available on the Orthoptera Species File (OSF) online (http://orthoptera.speciesfile.org).

scholarly journals Traccatichthys tuberculum, a new species of nemacheiline loach from Guangdong Province, South China (Pisces: Balitoridae)

Zootaxa ◽  
2012 ◽  
Vol 3586 (1) ◽  
pp. 304 ◽  
Author(s):  
CHUN-XIAN DU ◽  
E ZHANG ◽  
BOSCO PUI LOK CHAN
Keyword(s):  
New Species ◽  
South China ◽  
Guangdong Province ◽  
Color Pattern ◽  
Caudal Peduncle ◽  
Peduncle Length ◽  
Coastal River ◽  
Fin Length ◽  
A New Species ◽  
Preanal Length

Traccatichthys tuberculum, new species, is herein described from the Jian-Jiang, a coastal river in Guangdong Province,South China. Photo by Bosco P.L. Chan. This new species differs from all other Chinese congeners (i.e., T. pulcher and T.zispi) in interorbital width, caudal-peduncle length, and pectoral-fin length. It, together with T. zispi, lacks the colorpatterns of the dorsal and anal fins in T. pulcher, and differs from T. zispi in preanal length. Traccatichthys tuberculum,together with all other Chinese congeners, is distinct from the Vietnamese species, T. taeniatus, in the shape of the black bar on the caudal-fin base, and the color pattern of the anal fin.

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.

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