New species of Rineloricaria (Siluriformes: Loricariidae) from the Paranaíba River basin, Brazil

Zootaxa ◽  
2021 ◽  
Vol 5072 (6) ◽  
pp. 531-540
Author(s):  
GUILHERME JOSÉ DA COSTA-SILVA ◽  
CLAUDIO OLIVEIRA ◽  
GABRIEL DE SOUZA DA COSTA E SILVA
Keyword(s):  
New Species ◽  
River Basin ◽  
Color Pattern ◽  
Neotropical Region ◽  
Valid Species ◽  
Southeastern Brazil ◽  
Dark Spot ◽  
Caudal Fin ◽  
Fin Ray ◽  
First Ray

Rineloricaria is a genus of armored catfish encompassing 67 valid species that are widely distributed throughout the Neotropical region. A new species of Rineloricaria is described from the Paranaíba River, Upper Paraná River basin, southeastern Brazil. Rineloricaria rodriquezae sp. n. is distinguished from its congeners by the combination of the following characters: caudal-fin color pattern with basal dark spot and subterminal dark bar on branched rays interspersed with a hyaline area; five series of lateral plates with two keeled in the mid-dorsal series around the insertion of the first ray of dorsal fin; and unbranched caudal-fin ray extended as long filaments.  

A new phreatic catfish of the genus Phreatobius Goeldi 1905 from groundwaters of the Iténez River, Bolivia (Siluriformes: Heptapteridae)

Zootaxa ◽  
2007 ◽  
Vol 1626 (1) ◽  
pp. 51-58 ◽  
Author(s):  
LUIS FERNANDEZ ◽  
LISANDRO J. SAUCEDO ◽  
FERNANDO M. CARVAJAL-VALLEJOS ◽  
SCOTT A. SCHAEFER
Keyword(s):  
New Species ◽  
River Basin ◽  
River Mouth ◽  
Amazon River ◽  
Neural Spine ◽  
Amazon River Basin ◽  
Caudal Fin ◽  
Near Surface ◽  
Fin Ray ◽  
Fin Rays

Phreatobius sanguijuela, new species, is described from an artificial well located within the Río Paraguá drainage, a tributary of the Río Iténez, Bolivia. The new species is distinguished from its sole congener, P. cisternarum, by the absence of eyes, presence of 25–34 (versus 42–50) dorsal procurrent caudal-fin rays, 14–16 (versus 22–26) ventral procurrent caudal-fin rays, and 45–46 (versus 54–59) vertebrae. Both Phreatobius species are phreatic and known only from artificial wells penetrating near-surface aquifers of the Amazon River basin. Material of the new species represents the first records of Phreatobius from the upper Amazon, some 2000 km from reported locations of P. cisternarum near the Amazon River mouth. Phreatobius can be readily distinguished among siluriforms by the following combination of characters: dorsal and ventral procurrent caudal-fin rays extended rostrally, continuous with anal fin ventrally; caudal fin round; anal-fin rays unbranched; mouth prognathous, with jaws displaced dorsally on head; adductor mandibulae muscle hypertrophied, covering most of skull and posteriorly inserting onto first neural spine; first pectoral-fin ray soft, not spinous; bright red in life. This species is under severe threat from overexploitation by local people, who routinely capture and destroy it on the presumption that it represents a dangerous parasite.

Phenacorhamdia cabocla, a new heptapterid from the Parnaíba River basin, Northeastern Brazil (Siluriformes: Heptapteridae)

Zootaxa ◽  
2018 ◽  
Vol 4402 (2) ◽  
pp. 353 ◽  
Author(s):  
YURI GOMES PONCE DE CARVALHO ROCHA ◽  
TELTON PEDRO ANSELMO RAMOS ◽  
ROBSON TAMAR DA COSTA RAMOS
Keyword(s):  
River Basin ◽  
Lower Lobe ◽  
Northeastern Brazil ◽  
Valid Species ◽  
Neural Spine ◽  
Caudal Fin ◽  
Pectoral Fins ◽  
Dorsal Fin ◽  
First Ray ◽  
Adipose Fin

Phenacorhamdia Dahl, 1961 comprises 11 valid species of small demersal and solitary catfishes which occur mainly along riverbeds and are widely distributed throughout rivers of South America. The genus is included within the Nemuroglanis subclade, and species of Phenacorhamdia can be separated from other heptapterid catfishes through external and internal characters. Diagnostic characters include a prognathous mouth, first ray of dorsal and pectoral fins flexible, eight or nine branched rays in the lower lobe of caudal fin, and optic foramen reduced. A new species of Phenacorhamdia is described herein from the upper Parnaíba river basin. Phenacorhamdia cabocla sp. nov is distinct from its congeners by: total vertebrae 44, nine of which with pleural ribs; bifid neural spines until vertebrae 13; last precaudal vertebrae lacking pleural ribs; 7–8 branchiostegal rays; pectoral-fin rays i+6; first pterygiophore of dorsal-fin associated to the neural spine of twelfth vertebrae; dorsal-fin pterygiophores associated to vertebrae 12 to 16; anal-fin with nine branched and 3–4 unbranched rays; upper and lower lobes of caudal fin with 8–9 branched rays each; adipose fin corresponding to 14.9%–18.1% of standard length; and snout length corresponding to 30.0%–35.9% of head length.  

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.

A new species of Phenacorhamdia Dahl 1961 (Siluriformes: Heptapteridae) from the Paranapanema River basin, southeastern Brazil

Zootaxa ◽  
2020 ◽  
Vol 4890 (2) ◽  
pp. 275-282
Author(s):  
GABRIEL S. C. SILVA
Keyword(s):  
New Species ◽  
River Basin ◽  
Southeastern Brazil ◽  
Pectoral Fin ◽  
Caudal Fin ◽  
Fin Rays ◽  
Upper Paraná River ◽  
Upper Paraná River Basin ◽  
Brown Body ◽  
A New Species

A new species of Phenacorhamdia is described from Paranapanema River, Upper Paraná River basin, southeastern Brazil. The new species is distinguished from congeners by the combination of following characters 45−46 vertebrae; an entirely dark-brown body; nine pleural ribs; eight branched rays in upper lobe of caudal fin; seven branched rays in pectoral fin; 13 anal-fin rays with 9−10 branched; first basal radial inserted at the 13th vertebrae and eight branchiostegal rays. 

scholarly journals A new species of the catfish genus Cambeva from the Paranapanema river drainage, southeastern Brazil (Siluriformes: Trichomycteridae)

2020 ◽  
Vol 33 (1) ◽  
Author(s):  
Axel M. Katz ◽  
Wilson J.E.M. Costa
Keyword(s):  
New Species ◽  
River Basin ◽  
Paraná River ◽  
Valid Species ◽  
Colour Pattern ◽  
Southeastern Brazil ◽  
River Drainage ◽  
Parana River ◽  
A New Species ◽  
Paraná River Basin

The recently described catfish trichomycterid genus Cambeva comprises about 25 valid species, occurring mostly in river basins of south-eastern and southern Brazil. Fifteen species are endemic to the Paraná river basin, of which three are endemic to the Paranapanema river drainage. Herein we describe a fourth new species, Cambeva guareiensis n. sp., known only from the Guareí river. Cambeva guareiensis is similar to C. brachykechenos, C. cubataonis, C. diabola, C. davisi, C. diatropoporos, C. pascuali, C. poikilos and C. stawiarski by having a colour pattern consisting of dark brown spots scattered on the flank and can be differentiated by an exclusive combination of characters, including: the shape of the autopalatine; number of branchiostegal, anal-fin, dorsal-fin, dorsal and ventral caudal procurrent, and pectoral-fin rays; number of interopercular and opercular odontodes; number of vertebrae; and, insertion of anal fin, pelvic fin and urogenital papillae. This study indicates the potential for discovering a greater still unknown trichomycterid species diversity in the Paraná river basin.

scholarly journals Pseudomystus heokhuii, a new species of bagrid catfish from Sumatra (Teleostei: Bagridae)

Zootaxa ◽  
2008 ◽  
Vol 1686 (1) ◽  
pp. 37
Author(s):  
KELVIN K. P LIM ◽  
HEOK HEE NG
Keyword(s):  
New Species ◽  
Color Pattern ◽  
The Body ◽  
Caudal Fin ◽  
Unique Color ◽  
Orbital Margin ◽  
Fin Ray ◽  
Pectoral Spine ◽  
Central Sumatra ◽  
A New Species

Pseudomystus heokhuii, a new species of bagrid catfish is described from highly acidic blackwater habitats in central Sumatra. The new species can be distinguished from congeners by its unique color pattern of a pale midlateral stripe and pale oblique bands on the sides of the body. It is most similar to, and can be found sympatrically with, P. leiacanthus, but can be further distinguished from it in having two (vs. one) dark narrow irregular bars on the caudal fin, longer pectoral spine (19.3–22.4% SL vs. 15.2–18.6), longer caudal fin (33.5–40.0% SL vs. 25.7–31.9) with pointed (vs. rounded) lobes, longer nasal and maxillary barbels (63.1–81.1% HL vs. 31.3–51.5 and 86.2–125.3% HL vs. 70.9–91.3 respectively; nasal barbel reaching to dorsal insertion of opercular flap vs. to just beyond posterior orbital margin and maxillary barbel reaching just beyond base of last pectoral-fin ray vs. to base of pectoral spine), a straight (vs. crescentic) premaxillary tooth patch, a more sharply tapering snout when viewed dorsally, and an even (vs. slightly convex) predorsal profile.

scholarly journals Two new species of the catfish genus Trichomycterus (Siluriformes: Trichomycteridae) from the rio Ribeira de Iguape Basin, southeastern Brazil

2005 ◽  
Vol 3 (4) ◽  
pp. 465-472 ◽  
Author(s):  
Wolmar Benjamin Wosiacki ◽  
Osvaldo Takeshi Oyakawa
Keyword(s):  
New Species ◽  
Standard Length ◽  
Head Length ◽  
Southeastern Brazil ◽  
Pectoral Girdle ◽  
Base Length ◽  
Pectoral Fin ◽  
Caudal Fin ◽  
Fin Ray ◽  
Pelvic Fin

Two new species of the trichomycterid catfish genus Trichomycterus from the rio Ribeira de Iguape basin, southeastern Brazil, are described. Trichomycterus tupinamba differs from the other species of the Trichomycterinae in having the first pectoral-fin ray not prolonged as a filament, the caudal fin is truncate with attenuated edges, two paired supraorbital pores s6, eye oriented dorsally, a subterminal mouth, anal and urogenital openings mid-way between the pelvic-fin margin and anal-fin origin, a dark spot at the base of the nasal barbel, a longitudinal row of dark spots along the midline of the flank from the opercle to the caudal-fin base, a pectoral-girdle width of 13.1-17.7 % of standard length, and a caudal-peduncle depth of 8.7-10.3 % of standard length. Trichomycterus jacupiranga differs from all other species of the Trichomycterinae in having the first pectoral-fin ray prolonged as a short filament, one fused supraorbital pore s6, a pelvic fin that covers the anal and urogenital openings, anal and urogenital openings that are closer to the anal-fin origin than to the pelvic-fin base, a truncated caudal fin with attenuated edges, and the following morphometric characteristics: head length 20.7-22.4 % standard length, preanal length 57.1-70.9 % standard length, pectoral girdle width 17.4-20.6 % standard length, trunk length 33.6-37.5 % standard length, pectoral-fin length 16.8-22.7 % standard length, dorsal-fin base length 12.8-14.1 % standard length, anal-fin base length 8.4-10.8 % standard length, head width 90.6-104.6 % head length, snout length 40.0-46.9 % head length, mouth width 27.0-37.3 % head length, and eye diameter 10.4-16.5 % head length. Distribution, ecological data and diagnostic features are presented for both new species.

scholarly journals A new species of Hemibrycon (Teleostei: Characiformes: Characidae) from the río Ucayali drainage, Sierra del Divisor, Peru

2007 ◽  
Vol 5 (3) ◽  
pp. 251-257 ◽  
Author(s):  
Vinicius A. Bertaco ◽  
Luiz R. Malabarba ◽  
Max Hidalgo ◽  
Hernán Ortega
Keyword(s):  
New Species ◽  
Lateral Line ◽  
Color Pattern ◽  
Lower Half ◽  
Caudal Peduncle ◽  
Caudal Fin ◽  
Fin Ray ◽  
Fin Rays ◽  
Black Band ◽  
A New Species

A new characid species, Hemibrycon divisorensis, is described from the río Ucayali drainage, Loreto, Peru. The new species is distinguished from all Hemibrycon species by the presence of a wide black asymmetrical spot covering base of caudal-fin rays and extending along entire length of caudal-fin rays 9 to 12-13 (except from H. surinamensis), and a black band in the lower half of the caudal peduncle extending from the region above the last anal-fin rays to the caudal-fin base. Furthermore, it is distinguished from most species of the genus by the number of scale rows below the lateral line (4-5 vs 5-9), except H. jabonero, H. microformaa, H. orcesi, and H. surinamensis. It differs from these species by scale and fin ray counts and color pattern. The lack of a supraorbital in Hemibrycon species is discussed and confirmed.

New species of the catfish genus Trichomycterus (Siluriformes, Trichomycteridae) from the headwaters of the rio S o Francisco basin, Brazil

Zootaxa ◽  
2004 ◽  
Vol 592 (1) ◽  
pp. 1 ◽  
Author(s):  
WOLMAR BENJAMIN WOSIACKI
Keyword(s):  
New Species ◽  
Phylogenetic Relationships ◽  
Color Pattern ◽  
Head Length ◽  
Brown Spot ◽  
Pectoral Fin ◽  
Diagnostic Features ◽  
Caudal Fin ◽  
Interorbital Space ◽  
Fin Ray

Trichomycterus trefauti, new species, is described based on eight specimens from the rio S o Francisco basin, Minas Gerais, Brazil. The new species differs from all other trichomycterine species by the autapomorphic presence of an elliptical, vertically elongated, brown spot, at caudal-fin base, and the combination of homogeneously gray color pattern, first pectoral-fin ray prolonged as a filament, subterminal mouth, two supraorbital pores at interorbital space, caudal fin truncate with attenuated edges, pelvic fins covering anus and urogenital openings, interorbital space very wide (39.8 45.9 % head length), maxillary barbels very long (84.2 93.0 % head length), rictal barbels very long (67.6 74.3 % head length). Systematics, diagnostic features, and putative information on phylogenetic relationships of Trichomycterus species are discussed.

scholarly journals A new species of Aphanotorulus (Siluriformes: Loricariidae) from the rio Aripuanã basin, Brazil

2017 ◽  
Vol 15 (1) ◽  
Author(s):  
Andreza S. Oliveira ◽  
Lúcia Rapp Py-Daniel ◽  
Cláudio H. Zawadzki
Keyword(s):  
New Species ◽  
Lower Lobe ◽  
Color Pattern ◽  
Valid Species ◽  
Caudal Fin ◽  
Mato Grosso ◽  
A New Species

ABSTRACT The cis-Andean genus Aphanotorulus was recently revised and comprises six valid species: A. ammophilus, A. emarginatus, A. gomesi, A. horridus, A. phrixosoma and A. unicolor. Herein, a new species is described from tributaries of the rio Aripuanã basin, in Amazonas and Mato Grosso states, Brazil. The new species is easily distinguished from congeners by its color pattern: caudal fin with upper lobe mostly hyaline with dark spots along rays and membranes, and lower lobe red and without dark spots; and absence of dark spots in the lateral series of mid-ventral plates.

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