Serrapinnus heterodon
Creators: name: Ota, Renata Rúbia
name: Deprá, Gabriel de Carvalho
name: Graça, Weferson Júnio da
name: Pavanelli, Carla Simone
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Actinopterygii
Characiformes
Characidae
Serrapinnus
Serrapinnus heterodon

description: <i>Serrapinnus heterodon</i> (Eigenmann, 1915) <b>Fig. 10</b> Body elongated; greatest body depth contained 3.3 to 4.0 and caudal peduncle depth 8.6 to 10.5 times in SL; head length 4.1 to 4.4, predorsal distance 1.9 to 2.0 and caudal peduncle length 5.0 to 6.4 in SL; snout length 2.8 to 3.2, horizontal orbital diameter 2.8 to 3.2 and least interorbital width 3.0 to 3.5 in HL. Mouth terminal; premaxilla with 5 or 6, dentary with 4-8 teeth with expanded tips, and maxilla with 1 to 3 teeth. Lateral line completely pored, with 32-36 pored scales; longitudinal series with 32-36 scales; transverse series above lateral line with 6 scale rows and below with 3-4 scale rows. Dorsal fin with 11, pectoral fin with 10-12, pelvic fin with 8, anal fin with 19-22 and caudal fin with 19 rays. Ground color whitish; dark-brown longitudinal stripe on flank, from pseudotympanum to caudal peduncle; black oval, horizontally elongated, blotch on posterior portion of caudal peduncle and caudal-fin base, not extended to median caudal-fin rays. <b>Maximum standard length.</b> 30.9 mm. <b>Biological data.</b> Feeding habit omnivorous; total spawning, and spawning period during rainy season (Gonçalves <i>et al.</i>, 2011). <b>Distribution.</b> Upper rio Paraná and rio São Francisco basins, and coastal drainages of the Rio Grande do Norte State, Northeastern Brazil. <b>Remarks.</b> Some specimens of <i>Serrapinnus heterodon</i> were identified as <i>Odontostilbe</i> sp. (now as <i>O. avanhandava</i>) by Graça, Pavanelli (2007). Both species occur in the upper rio Paraná floodplain, where <i>S. heterodon</i> has been captured since 2008 by the Nupélia staff. <i>Serrapinnus heterodon</i> can be distinguished by having the dentary teeth with three wide central cusps of same size and two small lateral ones, caudal peduncle blotch oval-shaped, reaching median caudal-fin rays, and mature males with a ventrally arched caudal peduncle (one of the synapomorphies for the genus, according to Malabarba, 1998) (<i>vs.</i> dentary teeth slender and pointed, with one central cusp longer than the four lateral ones, caudal peduncle blotch rounded, not reaching the median caudal-fin rays, and mature males not having the caudal peduncle arched, in <i>Odontostilbe avanhandava</i>). The confusion between the specimens of the upper rio Paraná floodplain can be associated with the completely pored lateral line. This character is common in <i>Odontostilbe</i>, whereas the number of pored scales is reduced in <i>Serrapinnus</i>. The only exception in <i>Serrapinnus</i> is found in <i>S. heterodon</i>, which has a completely pored lateral line.
description: Published as part of <i>Ota, Renata Rúbia, Deprá, Gabriel de Carvalho, Graça, Weferson Júnio da &amp; Pavanelli, Carla Simone, 2018, Peixes da planície de inundação do alto rio Paraná e áreas adjacentes: revised, annotated and updated, pp. 1-111 in Neotropical Ichthyology 16 (2)</i> on page 37, DOI: 10.1590/1982-0224-20170094, http://zenodo.org/record/3678395
description: {"references": ["Eigenmann CH. The Cheirodontinae, a subfamily of minute characid fishes of South America. Mem Mus Comp Zool. 1915; 7 (1): 1 - 100.", "Goncalves CS, Souza UP, Braga FMS. Population structure, feeding and reproductive aspects of Serrapinnus heterodon (Characidae, Cheirodontinae) in a Mogi Guacu reservoir (SP), upper Parana River basin. Acta Limnol Bras. 2011; 23 (1): 13 - 22.", "Pavanelli CS, Graca WJ, Zawadzki CH, Britski HA, Vidotti AP, Avelino GS, Verissimo S. Fishes from the Corumba Reservoir, Paranaiba River drainage, upper rio Parana basin, State of Goias, Brazil. Check List. 2007; 3 (1): 58 - 64.", "Malabarba LR. Monophyly of the Cheirodontinae, characters and major clades (Ostariophysi: Characidae). In: Malabarba LR, Reis RE, Vari RP, Lucena ZMS, Lucena CAS, editors. Phylogeny and classification of Neotropical fishes. Porto Alegre: Edipucrs; 1998. p. 193 - 233."]}