Redescription of Astyanax multidensEigenmann, 1908 (Characiformes: Characidae), a small characid of the Brazilian Amazon

Marinho, Manoela M. F.; Birindelli, José L. O.

doi:10.1590/s1679-62252013000100005

Cited by 8 publications

(5 citation statements)

References 24 publications

(22 reference statements)

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“…3d). Definition of a second humeral blotch have been discussed in the literature and cases somewhat similar to that of H. itaparicensis are treated as a "(…) pigmented area progressively fading posteriorly as a longitudinal stripe" (e.g., Marinho, Birindelli, 2013;Marinho, Ohara, 2013;Marinho et al, 2015) rather than as a second humeral blotch. Particularly to members of Hyphessobrycon, Teixeira et al (2016) recognized the second humeral blotch as present only when it has well-defined anterior and posterior limits, as seen, for example, in H. bifasciatus, H. flammeus, and H. griemi.…”

Section: Discussionmentioning

confidence: 99%

Redescription of Hyphessobrycon itaparicensis, a senior synonym of H. sergipanus (Characiformes: Characidae)

et al. 2018

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Hyphessobrycon itaparicensis was originally described from a small stream in the Itaparica coastal island, Bahia State, Brazil, and has been sampled in several coastal rivers draining Bahia and Sergipe States. Broad examination of type material and recently collected specimens resulted in the redescription provided herein. The presence of one humeral blotch, absence of pseudotympanum, and conservation aspects of H. itaparicensis are briefly discussed. Data obtained from the original description, paratypes and topotypes of H. sergipanus showed broad overlap with H. itaparicensis and absence of morphological diagnostic features supporting the recognition of H. sergipanus as a valid species. Thus, H. sergipanus is considered as junior synonym of H. itaparicensis. We emphasize the need of examining large population samples and type material of similar congeners to avoid improper propositions of new specific names.

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Section: Discussionmentioning

confidence: 99%

Redescription of Hyphessobrycon itaparicensis, a senior synonym of H. sergipanus (Characiformes: Characidae)

et al. 2018

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“…Astyanax multidens Eigenmann 1908, Astyanax guaporensis Eigenmann 1911). This condition is also treated in the literature as a ‘…pigmented area progressively fading posteriorly as a longitudinal stripe’ (Marinho & Birindelli, ; Marinho & Ohara, ), rather than as a second humeral blotch. These alternative descriptions highlight problems with the recognition of such pigmentation as a second humeral blotch.…”

Section: Discussionmentioning

confidence: 99%

Two new species of Hyphessobrycon (Characiformes: Characidae) from the headwaters of the Tapajós and Xingu River basins, Pará, Brazil

Teixeira

Netto‐Ferreira

Birindelli

et al. 2015

Journal of Fish Biology

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Two new species of Hyphessobrycon are described from the headwaters of the Tapajós and Xingu River basins, Pará, Brazil. Both new species can be distinguished from congeners by the presence of a vertically elongate humeral blotch, a conspicuous round to vertically oblong caudal-peduncle blotch not extending onto the distal portions of the middle caudal-fin rays, a conspicuous blotch on the central portion of the third infraorbital immediately ventral to the eye, the lack of a conspicuous longitudinal stripe and the lack of sexual dimorphism in the extension of the caudal-peduncle blotch. Hyphessobrycon delimai n. sp. can be distinguished from Hyphessobrycon krenakore n. sp. by the extent of the caudal-peduncle blotch which extends across most of the caudal-peduncle depth (v. restricted to the middle portion of the caudal peduncle), the presence of dark chromatophores uniformly scattered along the length of the interradial membranes of the dorsal, anal and caudal fins (v. concentrated on the distal one-half or one-fourth of the interradial membranes) and the absence of small bony processes on the pelvic and anal fins of mature males (v. small bony processes present).

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“…Morphological data cited in the diagnosis from other species of Astyanax were based on original descriptions, additional literary resources (Eigenmann & Ogle, 1907;Eigenmann, 1921;Hildebrand, 1938;Garutti & Britski, 1997;Bussing, 1998Bussing, , 2008Garutti, 1998;Garutti & Langeani, 2009;Dagosta, 2011;Maldonado-Ocampo et al, 2012;Torres-Mejia et al, 2012;Marinho & Birindelli, 2013;Marinho & Ohara, 2013;Lucena & Soares, 2016;Schmitter-Soto, 2016 andRuiz-C et al, 2018) and additional analysed specimens. Institutional abbreviations followed Sabaj (2016): CAS, Chinese Academy of Sciences, Institute of Zoology, Beijing, PDR China; DZSJRP, Departmento de Zoologia e Botânica, Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP), Campus de São José do Rio Preto, São Paulo, Brazil; FMNH, Field Museum of Natural History, Geology Department (slide collection), Chicago, IL, U.S.A.; MZUSP, Museu de Zoologia da Universidade de São Paulo, São Paulo, Brazil; USNM, Table II) was performed using the software TNT 1·1 (Goloboff et al, 2008).…”

Section: Methodsmentioning

confidence: 99%

A new species of Astyanax (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

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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.

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Redescription of Astyanax multidensEigenmann, 1908 (Characiformes: Characidae), a small characid of the Brazilian Amazon

Cited by 8 publications

References 24 publications

Redescription of Hyphessobrycon itaparicensis, a senior synonym of H. sergipanus (Characiformes: Characidae)

Redescription of Hyphessobrycon itaparicensis, a senior synonym of H. sergipanus (Characiformes: Characidae)

Two new species of Hyphessobrycon (Characiformes: Characidae) from the headwaters of the Tapajós and Xingu River basins, Pará, Brazil

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

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