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.

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.

Description of a new species of sand-dwelling catfish of the genus Stenolicmus (Siluriformes; Trichomycteridae)

Zootaxa ◽  
2011 ◽  
Vol 2752 (1) ◽  
pp. 62 ◽  
Author(s):  
WOLMAR BENJAMIN WOSIACKI ◽  
DANIEL PIRES COUTINHO ◽  
LUCIANO FOGAÇA DE ASSIS MONTAG
Keyword(s):  
New Species ◽  
Posterior Margin ◽  
Color Pattern ◽  
Distal Margin ◽  
Dorsal Region ◽  
Caudal Peduncle ◽  
Caudal Fin ◽  
Left Tributary ◽  
Fin Length ◽  
A New Species

Stenolicmus ix, new species, is described from Igarapé Curuá, left tributary of the Rio Amazonas, Pará, Brazil. It can be distinguished from S. sarmientoi by the length of the nasal barbels that reach the base of the first opercular odontodes; length of the maxillary barbels that reach the posterior margin of the opercular odontode plate; seven well-developed opercular odontodes; seven well-developed interopercular odontodes; color pattern of the dorsal region of trunk composed of agglomerated chromatophores forming circular patches twice the diameter of the eye; proportionally large eyes, 11.8% HL; caudal peduncle tall, 11.6% SL, without dark bar at base of the caudal fin; length of the head proportionately larger, 17.9% SL; unbranched rays of caudal fin reaching distal margin of fin. Comparisons with other Sarcoglanidinae and Trichomycteridae are presented. Some comments on the systematics and phylogenetic relationships of the group are made.

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.

scholarly journals Description of a new species of Ituglanis (Siluriformes: Trichomycteridae) from Serra dos Carajás, rio Tocantins basin

2012 ◽  
Vol 10 (3) ◽  
pp. 547-554 ◽  
Author(s):  
Wolmar B. Wosiacki ◽  
Guilherme M. Dutra ◽  
Marina B Mendonça
Keyword(s):  
New Species ◽  
Color Pattern ◽  
Caudal Fin ◽  
Dorsal Fin ◽  
Trunk Line ◽  
Fin Rays ◽  
The Relationship ◽  
A New Species

A new species of Ituglanis is described from the rio Tocantins basin, State of Pará, Brazil. Ituglanis ina, new species, is distinguished from its congeners by the presence of a dark vertical bar over the base of the caudal-fin rays (vs. no bars over caudal-fin base); and by the presence of a middle trunk line of tiny neuromasts extending along the flank until the vertical through the dorsal fin, or near the caudal-fin base (vs. no middle trunk line of tiny neuromasts). Ituglanis ina can be further distinguished by a combination of characters related to color pattern and morphology. Comments on the relationship between Ituglanis species are presented.

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.

Rivulus kayapo n. sp. (Teleostei: Cyprinodontiformes: Rivulidae): a new killifish from the serra dos Caiapos, upper rio Araguaia basin, Brazil

Zootaxa ◽  
2006 ◽  
Vol 1368 (1) ◽  
pp. 49 ◽  
Author(s):  
WILSON J.E.M. COSTA
Keyword(s):  
New Species ◽  
Color Pattern ◽  
Species Group ◽  
Caudal Fin ◽  
Dorsal Fin ◽  
Fin Rays ◽  
Identification Of Species

Rivulus kayapo, new species, a member of the Rivulus punctatus species group from the rio Caiapó drainage, upper rio Araguaia basin, is described. It is similar to R. pinima by the absence of bars on the caudal fin and flank in both sexes, in having longitudinal rows of red dots along the entire flanks in both sexes, and in having longitudinally elongated white mark above the caudal spot in females. Rivulus kayapo differs from R. pinima in having more caudal-fin rays, the dorsal-fin origin more posteriorly placed, and fewer scales in the longitudinal and transverse series; and differs from all congeners of the R. punctatus species group by possessing a unique reticulate color pattern on the flanks in males. A key for identification of species of Rivulus from the rio Araguaia-Tocantins basin is provided.

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.  

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 Two new species of Hyphessobrycon (Teleostei: Characidae) from upper rio Tapajós basin on Chapada dos Parecis, central Brazil

2006 ◽  
Vol 4 (3) ◽  
pp. 301-308 ◽  
Author(s):  
Tiago Pinto Carvalho ◽  
Vinicius Araújo Bertaco
Keyword(s):  
New Species ◽  
Posterior Margin ◽  
Caudal Fin ◽  
Mato Grosso ◽  
Central Brazil ◽  
Dorsal Fin ◽  
Two New Species ◽  
Fin Rays ◽  
Black Band

Two new species of Hyphessobrycon are described from the upper rio Tapajós basin, Mato Grosso, Brazil. Hyphessobrycon melanostichos is distinguished from its congeners by the combination of a conspicuous longitudinal broad black band beginning on the posterior margin of orbit and reaching the tip of middle caudal fin rays, a distinct vertically elongate humeral spot, and 16 to 18 branched anal-fin rays. Hyphessobrycon notidanos is distinguished from its congeners by the combination of an elongate dorsal fin in mature males, a vertically elongate humeral spot, 2-4 maxillary teeth, iii,8 dorsal-fin rays, and 16 to 21 branched anal-fin rays.

Rhinogobius maculagenys, A new species of freshwater goby (Teleostei: Gobiidae) from Hunan, China

Zootaxa ◽  
2018 ◽  
Vol 4476 (1) ◽  
pp. 118
Author(s):  
QIANQIAN WU ◽  
XUEJIAN DENG ◽  
YANJIE WANG ◽  
YONG LIU
Keyword(s):  
New Species ◽  
Anterior Margin ◽  
Southern China ◽  
Hunan Province ◽  
Caudal Fin ◽  
Dorsal Fin ◽  
Freshwater Goby ◽  
Single Spine ◽  
A New Species ◽  
Bright Blue

A new freshwater goby, Rhinogobius maculagenys sp. nov., was collected from Hunan Province in Southern China. This species can be distinguished from all congeners by a combination of the following features: first dorsal fin with 6 spines; second dorsal fin with a single spine and 7–9 segmented rays; anal fin with a single spine and 6–8 segmented rays; pectoral fin with 16 segmented rays; 32–34 longitudinal scales; 9–13 transverse scales; 11+16=27 vertebrae; pore ω1 missing; head and body yellowish brown; cheek and opercle yellowish brown with over 30 small orange spots, branchiostegal membrane yellow with over 10 small orange spots in males and white and spotless in females; first dorsal fin trapezoidal in males and nearly semicircular in females, with large bright blue blotch in front of second spine; spines 4 and 5 longest, rear tip extending to base of second branched ray of second dorsal fin in males when adpressed, but just reaching or not reaching anterior margin of second dorsal fin in females; caudal fin with 5–6 vertical rows of brown spots; flank with several longitudinal rows of blackish-brown spots; and belly pale white.

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