Geophagus sveni Lucinda, Lucena, Assis 2010
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
Perciformes
Cichlidae
Geophagus
Geophagus sveni

description: <i>Geophagus sveni</i> Lucinda, Lucena, Assis, 2010 <b>Fig. 35</b> Body deep; greatest depth contained 2.1 to 2.5 times in SL; head length 3.0 to 3.3 in SL; snout length 1.5 to 2.4, horizontal orbital diameter 3.2 to 4.7 and least interorbital width 2.7 to 3.5 in HL. Mouth terminal; premaxilla and dentary with 2-4 teeth rows. Upper lateral line with 20-24 pored scales, lower lateral line with 17-19 pored scales, and longitudinal series with 32-34 scales. Transversal series above upper lateral line with 4 scale rows and below lower lateral line with 5 scale rows. Dorsal fin with XVI- XVIII,10-13 rays, pectoral fin with 15-16, pelvic fin with I,5 and anal fin with III,7-8 rays. Ground color greenish or silvery; iridescent marks on lachrymal, preopercle and opercle; five inconspicuous dark-brown transverse bars on flank and caudal peduncle; black rounded blotch on flank; six to 12 longitudinal series of orange spots on flank. Caudal fin reddish with four to seven iridescent blue stripes, occasionally broken into spots. Dorsal and anal fins with iridescent blue spots, sometimes forming horizontal stripes. <b>Maximum standard length</b>. 200.0 mm. <b>Biological data.</b> Feeds on sediment, decomposing organic matter, allochthonous plant fragments, mollusks, crustaceans, cladocerans, copepods and insects. Nests in the substrate, presents external fertilization and displays parental care. Both sexes may care for eggs and juveniles, and males usually defend the territory, while the female cares for the brood (Moretto <i>et al</i>., 2008; Gois <i>et al.</i>, 2015). <b>Distribution.</b> Rio Tocantins-Araguaia basin. <b>Remarks.</b> <i>Geophagus sveni</i> was identified as <i>G.</i> cf. <i>proximus</i> by Graça, Pavanelli (2007). Lucinda <i>et al.</i> (2010) described the new species from the rio Tocantins basin and distinguished it from <i>G. proximus</i> by not presenting a dark-grey preopercular mark. <i>Geophaus sveni</i> can also be distinguished by presenting four or five transverse parallel white stripes on the caudal fin, which can be broken into several spots (<i>vs.</i> parallel white stripes complete and horizontally directed on the caudal fin, in <i>G. proximus</i>) (Lucinda <i>et al.</i>, 2010). A manuscript on the geographic distribution of <i>G. sveni</i>, with a genetic comparison between specimens from the rio Tocantins and from the upper rio Paraná floodplain and an analysis of the ontogenetic development of color patterns in this species is being prepared by GCD. <i>Geophagus sveni</i> is a non-native species from the upper rio Paraná basin, and its occurrence can be associated with the aquarium trade.
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 96-97, DOI: 10.1590/1982-0224-20170094, http://zenodo.org/record/3678395
description: {"references": ["Lucinda PHF, Lucena CAS, Assis NC. Two new species of cichlid fish genus Geophagus Heckel from the rio Tocantins drainage (Perciformes: Cichlidae). Zootaxa. 2010; 2429: 29 - 42.", "Moretto EM, Marciano FT, Velludo MR, Fenerich-Verani N, Espindola ELG, Rocha O. The recent occurrence, establishment and potential impact of Geophagus proximus (Cichlidae: Perciformes) in the Tiete River reservoirs: an Amazonian fish species introduced in the Parana basin (Brazil). Biodivers Conserv. 2008; 17: 3013 - 25.", "Gois KS, Pelicice FM, Gomes LC, Agostinho AA. Invasion of an Amazonian cichlid in the upper Parana River: facilitation by dams and decline of a phylogenetically related species. Hydrobiologia. 2015; 746 (1): 401 - 13.", "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."]}