A new species of Astyanax Baird &amp; Girard (Ostariophysi: Characidae) from the rio Taquari-Antas basin, southern Brazil

Bertaco, Vinicius de Araújo; Vigo, Anelise C.

doi:10.1590/1982-0224-20140145

Cited by 879 publications

(4 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The new species described herein was assigned to Astyanax in accordance with the definition of the genus by Eigenmann, 1921, which is still in use Camelier & Zanata, 2014;Bertaco & Vigo, 2015); i.e. two rows of premaxillary teeth; five teeth in the inner premaxillary series; lateral line complete; adipose fin present; caudal fin naked.…”

Section: Discussionmentioning

confidence: 96%

A new species ofAstyanax(Characiformes: Characidae) from Costa Rica and Panama, with a key to the lower Central American species of the genus

Angulo

Santos

López

et al. 2018

Journal of Fish Biology

View full text Add to dashboard Cite

Astyanax anai, a new species of characid fish, is described from the Sixaola River basin, eastern Costa Rica-western Panama, Central America. The new species can be distinguished from all other congeners by the following combination of characters: premaxillary teeth 4-5 at the inner series and 4-6 at the outer series; maxillary teeth tricuspid, 2-4; predorsal scale series irregular and incomplete, with an unscaled space behind tip of supraoccipital process and 12-14 scales; lateral line scales 34-39; humeral region with a conspicuous black and rounded to horizontally ovate spot and two diffuse brown and vertically elongate bars (the first through the rounded to horizontally ovate spot, the second 2-4 scales behind the first); body depth 36·6-42·3% of standard length (L ); midlateral stripe formed by a series of 10-14 anteriorly-directed dermal herringbone, or chevron-shaped, marks, most apparent in juveniles and in preserved specimens, extending above the lateral line from the black humeral spot or just behind it (from the second vertical bar) to the caudal peduncle; scale rows from lateral line to base of first dorsal-fin ray 8-9; scale rows from lateral line to base of pelvic fin 7-8; pre-anal distance 53·9-61·9% of L ; total anal-fin elements 29-33; caudal spot elongated, rhomboid or rectangular, with its anterior margin surpassing the middle of the caudal peduncle, usually reaching the anal-fin insertion, posteriorly covering 4-7 principal caudal-fin rays and not extending onto the ventral and dorsal margins of the caudal peduncle, covering 3-5 horizontal scale rows. In order to test the phylogenetic relationships of the new taxon in relation to the other North and Central American species of the genus, a new phylogenetic hypothesis based on a reanalysis of the morphological matrix by Schmitter-Soto (2016) is proposed. A key to the lower Central American (southern Nicaragua to eastern Panama) species of Astyanax is also provided.

show abstract

Section: Discussionmentioning

confidence: 96%

A new species ofAstyanax(Characiformes: Characidae) from Costa Rica and Panama, with a key to the lower Central American species of the genus

Angulo

Santos

López

et al. 2018

Journal of Fish Biology

View full text Add to dashboard Cite

show abstract

“…A total of 79 species of Astyanax was described in the last 20 years (Fricke et al, 2019), being one of the fish genera with higher expansion on its richness knowledge. Advances in alpha taxonomy of the ichthyofauna of the Brazilian coastal drainages contributed with 21 of those descriptions, being 11 from the Northeastern Mata Atlântica freshwater ecoregion (e.g., Rangel-Pereira, 2012;Birindelli et al, 2013;Lima et al, 2013;Mattos, Costa, 2018;Barreto et al, 2018;Burger et al, 2019); seven from rivers draining the Laguna dos Patos freshwater ecoregion (e.g., Lucena et al, 2013;Bertaco, Vigo, 2015), one species from the Tramandaí-Mampituba freshwater ecoregion (Bertaco, 2014), one species from the Ribeira de Iguape freshwater ecoregion (Silva et al, 2019), and one from the Southeastern Mata Atlântica freshwater ecoregion (Oliveira et al, 2013). Particularly to the NMAF, nine of the 11 species mentioned are from river basins inserted in the Bahia State, highlighting the rio Paraguaçu basin, with six described species, all of them apparently endemic to this basin (A. brucutu, A. epiagos, A. hamatilis, A. lorien, A. rupestris, and A. sincora).…”

Section: Discussionmentioning

confidence: 99%

A new species of Astyanax (Characiformes: Characidae) from the rio de Contas basin, Bahia, Brazil

et al. 2019

View full text Add to dashboard Cite

A new species of Astyanax from tributaries of the rio de Contas, Bahia, Brazil, is described. The new species differs from congeners by having three horizontal series of scales from lateral line to pelvic-fin origin and the distal margin of third infraorbital distinctly separated from vertical and horizontal limbs of preopercle, leaving a broad area not covered by superficial bones. The new species further differs from most congeners by the presence of bony hooks on all fins of mature males. Particularly from congeners occurring in rivers of the Northeastern Mata Atlântica freshwater ecoregion, it further differs by having the highest body depth just anterior to the dorsal-fin origin, 34-37 pored lateral line scales, a vertically elongated conspicuous dark humeral blotch reaching below the lateral line and a conspicuous dark wide midlateral stripe extending from the clear area on the rear of the humeral blotch to the end of middle caudal-fin rays and forming an inconspicuous blotch on caudal peduncle.

show abstract

“…The diagnosis is presented according to the procedures described by Lucena et al (2013) and followed by Bertaco, Vigo (2015).…”

Section: Methodsmentioning

confidence: 99%

A new species of Astyanax (Ostariophysi: Characidae) from the headwaters of the arheic Río Sucuma, Catamarca, Northwestern Argentina

2017

View full text Add to dashboard Cite

A new species of Astyanax is described from the arheic system of Río Sucuma, in Catamarca, Northwestern Argentina. The new species is distinguished from its congeners by a combination of characters including the presence of a broad vertical humeral spot, absence of maxillary teeth, and absence of circuli in posterior field of scales. Furthermore, this species is distinguished by the orbital diameter, head length, branched anal-fin rays, perforated lateral-line scales, transverse scales, dentary teeth with abrupt decrease in size. This species is, to date, the single known fish endemic of Río Sucuma basin.Keywords: Arheic system, Characiformes, Cryptic species, Endemic species, Phylogeny. Una nueva especie de Astyanax, se describe del Sistema arreico del Río Sucuma, en Catamarca, Noroeste de Argentina. Esta nueva especie se distingue de sus congéneres por una combinación de caracteres que incluyen la presencia de una gran mancha humeral, verticalmente elongada, ausencia de diente en el maxilar, ausencia de circuli en el campo posterior de las escamas, además se distingue por un ojo relativamente pequeño, longitud de la cabeza, radios ramificados en la aleta anal; escamas perforadas en la línea lateral; escamas transversas; dentario con dientes que decrecen abruptamente. Esta especie es, a la fecha, el único pez endémico para la cuenca de Río Sucuma.

show abstract

A new species of Astyanax Baird & Girard (Ostariophysi: Characidae) from the rio Taquari-Antas basin, southern Brazil

Cited by 879 publications

References 22 publications

A new species ofAstyanax(Characiformes: Characidae) from Costa Rica and Panama, with a key to the lower Central American species of the genus

A new species ofAstyanax(Characiformes: Characidae) from Costa Rica and Panama, with a key to the lower Central American species of the genus

A new species of Astyanax (Characiformes: Characidae) from the rio de Contas basin, Bahia, Brazil

A new species of Astyanax (Ostariophysi: Characidae) from the headwaters of the arheic Río Sucuma, Catamarca, Northwestern Argentina

Contact Info

Product

Resources

About