Diapoma guarani (Mahnert, Géry, 1987)

Ota, Renata Rúbia, Deprá, Gabriel de Carvalho, Graça, Weferson Júnio da & Pavanelli, Carla Simone, 2018, Peixes da planície de inundação do alto rio Paraná e áreas adjacentes: revised, annotated and updated, Neotropical Ichthyology 16 (2), pp. 1-111 : 40

Diapoma guarani (Mahnert, Géry, 1987)

Fig. 11

Body elongate; greatest body depth contained 3.2 to 3.4, caudal-peduncle depth 9.9 to 11.3 times in S L; head length 4.5 to 4.6, predorsal length 1.8 to 1.9, and caudal-peduncle length 8.3 to 10.0 in SL; snout length 3.4 to 3.8, horizontal orbital diameter 2.3 to 2.5, and least interorbital width 2.8 to 3.0 times in HL. Mouth terminal; inner and outer row of premaxilla with 3 or 4, dentary with 12-16 and maxilla with 4 or 5 teeth. Lateral line with 6 or 7 pored scales; longitudinal series with 29-31 scales; transverse series above lateral line with 4½ or 5 scales above and below with 4 scale rows. Dorsal fin with 10, pectoral fin with 12-14, pelvic fin with 7 rays, anal with 22-24 rays, and caudal fin with 19 rays. Ground color whitish to pale yellow; darkbrown longitudinal stripe, from pseudotympanum to median caudal-fin rays. Fins overall reddish; distal margin of dorsal, caudal and anal fins black.

Maximum standard length. 48.0 mm.

Distribution. Upper rio Paraná basin, in Argentina, Brazil and Paraguay.

Remarks. Diapoma guarani was identified as Hyphessobrycon sp. by Graça, Pavanelli (2007). Thomaz et al. (2015), in a molecular phylogeny of the Stevardiinae , proposed a new classification where the species of Cyanocharax Malabarba, Weitzman, 2003 and Hyphessobrycon guarani were reallocated to Diapoma Cope, 1894 .

Figures

Fig. 11. a. Bryconamericus exodon, 55.8 mm SL, fresh specimen, uncat. b. Bryconamericus aff. iheringii, NUP 824, 50.0 mm SL, rio São Vicente, Missal, State of Paraná. c. Bryconamericus turiuba, NUP 6170, 59.3 mm SL, rio Iguatemi, tributary of the rio Paraná, Coronel Sapucaia, State of Mato Grosso do Sul. d. Diapoma guarani, NUP 17635, 31.2 mm SL, Canal da Piracema, Foz do Iguaçu, State of Paraná. e. Knodus moenkhausii, NUP 3211, 48.0 mm SL, riacho Água Nanci, Porto Rico, State of Paraná. f. Piabarchus stramineus, NUP 3298, 70.0 mm SL, rio Paraná, Porto Rico, State of Paraná. g. Piabina argentea, 68.0 mm SL, uncat. h. Planaltina britskii, NUP 11802, 27.5 mm SL, lagoa Genipapo (ilha Porto Rico, Foz do Iguaçu, State of Paraná.