Hypophthalmus oremaculatus Nani, Fuster 1947
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
Siluriformes
Pimelodidae
Hypophthalmus
Hypophthalmus oremaculatus

description: <i>Hypophthalmus oremaculatus</i> Nani, Fuster, 1947 <b>Fig. 28</b> Body elongate; greatest body depth contained 4.3 to 4.4, head depth 7.5 to 7.9, caudal-peduncle depth 11.8 to 12.0 times in SL; head length 4.1 to 4.3, anal-fin base length 2.0 to 2.2, adipose-fin base length 31.0 to 34.2, and maxillarybarbel length 3.6 to 4.2 in SL; snout length 2.0 to 2.2, horizontal orbital diameter 7.7 to 8.6, and least interorbital width 2.2 to 2.3 in HL. Mouth terminal; toothless. Dorsal fin with 7, pectoral fin with 16-18, pelvic fin with 7 and anal fin with 55-62 rays. Ground color greyish dorsally, whitish ventrally. Whitish fins with dark-grey margins. <b>Maximum standard length.</b> 440.0 mm. <b>Distribution.</b> Río Paraná basin. <b>Remarks.</b> <i>Hypophthalmus oremaculatus</i> was identified as <i>H. edentatus</i> by Graça, Pavanelli (2007). Littmann <i>et al.</i> (2015) redescribed <i>H. oremaculatus</i>, provided additional information on <i>H. edentatus</i> and proposed the new identification for the specimens from the río Paraná basin. Additionally, the same authors found an exceptional specimen in a tributary of the rio Paraná (NUP 1730) that matches the description of a new species (identified as <i>Hypophthalmus</i> cf. n. sp. 1, Littmann, Lundberg, in preparation) by having 61 total vertebrae, seven post-Weberian vertebrae, mental barbels not reaching pectoral fins, and dorsal-fin origin posterior to anal-fin origin (<i>vs.</i> 55 to 59 total vertebrae, 3 to 6 post-Weberian vertebrae, long mental barbels, extending to pectoral-fin origin or beyond, and dorsalfin origin approximately on vertical through anal-fin origin, in <i>H. oremaculatus</i>). However, the new species is from the rio Orinoco and Amazon basins, and, at this moment, Littmann <i>et al.</i> (2015) only speculated that this specimen is possible a phenotypic outlier of <i>H. oremaculatus</i>, or a geographic outlier of <i>Hypophthalmus</i> n. sp. 1. Nevertheless, <i>H. oremaculatus</i> is a non-native species from the upper rio Paraná, and its occurrence can be associated with the filling of the Itaipu Reservoir and the consequent inundation of the Sete Quedas Falls.
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 pages 81-82, DOI: 10.1590/1982-0224-20170094, http://zenodo.org/record/3678395
description: {"references": ["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.", "Littmann MW, Azpelicueta MM, Vanegas-Rios JA, Lundberg JG. Holotype-based validation, redescription and continentalscale range extension of the South American catfish species Hypophthalmus oremaculatus Nani and Fuster, 1947, with additional information on Hypophthalmus edentatus Spix and Agassiz, 1829 (Siluriformes, Pimelodidae). Proc Acad Nat Sci Philadelphia. 2015; 164 (1): 159 - 76."]}