Comparative morphology of bony hooks of the anal and pelvic fin in six neotropical characid fishes (Ostariophysi: Characiformes)

Vieira, Carolina Santos; Bartolette, Renata; Brito, Marcelo Fulgêncio Guedes

doi:10.1016/j.jcz.2016.01.003

Cited by 10 publications

(11 citation statements)

References 16 publications

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“…The variability in form, placement and size of the bony hooks has been useful for delimitation of species (Lima, Sousa, 2009;Vieira et al, 2016) and recognition of natural lineages within the family (Weitzman, Fink, 1985;Malabarba, 1998;Malabarba, Weitzman, 2003;Menezes, Weitzman, 2009;Mirande, 2010). In Stevardiinae, bony hooks are present in representatives of all tribes (sensu Thomaz et al, 2015), although not present in all species.…”

Section: Discussionmentioning

confidence: 99%

A new species of Bryconamericus (Characidae: Stevardiinae: Diapomini) from the upper rio Paraná basin, Brazil

Jerep

Shibatta

2017

Neotrop. ichthyol.

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Bryconamericus é o gênero de Stevardiinae mais diverso, com 64 espécies válidas distribuídas nas bacias Cis-e Trans-Andinas, do Panamá na América Central à região norte da Argentina na América do Sul. Dessas espécies, três são conhecidas da bacia do alto rio Paraná: B. exodon, B. iheringii e B. turiuba. Neste trabalho descrevemos uma espécie nova de Bryconamericus da bacia do alto rio Paraná, habitando tributários das bacias dos rios Ivaí, Piquiri e Tibagi, Estado do Paraná, Brasil. A espécie nova difere dos seus congêneres pela presença de dentes desalinhados na fileira externa de dentes do pré-maxilar; uma única mancha umeral vertical, expandida e arredondada dorsalmente; 36-39 escamas perfuradas na série longitudinal; altura do corpo 31,6-37,9% CP; base da nadadeira anal 24,8-30,1% CP; 19-22 raios ramificados na nadadeira anal e ganchos ósseos nas nadadeiras pélvica e anal de machos sexualmente dimórficos. A espécie nova é sintópica com outros Stervadiinae na bacia do alto rio Paraná, como B. iheringii, B. turiuba, Piabarchus stramineus e Piabina argentea.

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Section: Discussionmentioning

confidence: 99%

A new species of Bryconamericus (Characidae: Stevardiinae: Diapomini) from the upper rio Paraná basin, Brazil

Jerep

Shibatta

2017

Neotrop. ichthyol.

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“…Mature males have small retrorse bony hooks [similar to those described for A. lacustris by Vieira et al, ] on both pelvic and anal‐fin rays, one pair per ray segment, dispersed in the distal portion of the longest unbranched ray and in the posterior branches of each subsequent branched ray. Juveniles and mature females do not have fin hooks.…”

Section: Resultsmentioning

confidence: 79%

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

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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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“…The presence and morphology of these bony hooks represent an important data source for comparative phylogenetic, reproductive and behavioral studies (Bertaco, Malabarba, 2005;Vieira et al, 2016). Even though they are usually less developed and less informative in the species of Odontostilbe, their number and size were useful to diagnose O. avanhandava, O.…”

Section: Discussionmentioning

confidence: 99%

Two new species of Odontostilbe historically hidden under O. microcephala (Characiformes: Cheirodontinae)

2018

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Specimens historically identified as Odontostilbe microcephala from the upper rio Paraná and Andean piedmont tributaries of the río Paraguay are reviewed and split in three species. We found that the distribution of O. microcephala is restricted to the Andean slope of the río Paraguay basin. The species is distinguished from congeners with subterminal mouth by the elongate body, usually 10-12 gill rakers on upper branch and smaller horizontal orbital diameter (24.6-32.8 % HL, mean 28.7%). Specimens from upper rio Paraná constitute two new species, diagnosed from other Cheirodontinae by the presence of mesopterygoid teeth, grouped on median portion and forming a continuous row. The new species are distinguished from each other by having premaxillary teeth with five cusps vs. nine cusps and by the number of lamellae in left and right sides of central median raphe of olfactory rosette with 20-21 vs. 11-12.Keywords: Biodiversity, Characidae, La Plata River basin, Mesopterygoid teeth, Taxonomy.Espécimes historicamente identificados com Odontostilbe microcephala do rio Paraná e tributários do río Paraguay, foram revisados e separados em três espécies. A distribuição de O. microcephala é restrita ao sopé andino da bacia do río Paraguay. A espécie é distinta das congêneres com boca subterminal pela forma alongada, geralmente 10-12 rastros branquiais no ramo superior e menor diâmetro horizontal da órbita (24,6-32,8 % CC, média 28,7%). Espécimes do alto rio Paraná constituem duas espécies novas diagnosticadas de outros Cheirodontinae pela presença de dentes no mesopterigoide, agrupados em sua porção média e formando uma fileira continua. As novas espécies distinguem-se por ter dentes premaxilares com cinco cúspides vs. nove cúspides e pelo número de lamelas nos lados esquerdo e direito da rafe central da roseta olfativa com 20-21 vs. 11-12.Palavras-chave: Bacia do rio da Prata, Biodiversidade, Characidae, Dentes do Mesopterigoide, Taxonomia.

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Comparative morphology of bony hooks of the anal and pelvic fin in six neotropical characid fishes (Ostariophysi: Characiformes)

Cited by 10 publications

References 16 publications

A new species of Bryconamericus (Characidae: Stevardiinae: Diapomini) from the upper rio Paraná basin, Brazil

A new species of Bryconamericus (Characidae: Stevardiinae: Diapomini) from the upper rio Paraná basin, Brazil

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

Two new species of Odontostilbe historically hidden under O. microcephala (Characiformes: Cheirodontinae)

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