Otothyropsis marapoama Ribeiro, Carvalho, Melo, 2005 Fig. 27 Body elongated; greatest depth contained 5.0 to 5.4 times in SL; head length 2.3 to 2.4, pectoral-fin length 2.8 to 3.3 and pelvic-fin length 4.6 to 5.0 in SL; snout length 1.9 to 2.0, horizontal orbital diameter 6.9 to 7.0 and least interorbital width 2.6 to 2.7 in HL. Mouth inferior; premaxilla with 15-17 and dentary with 15-21 teeth. Longitudinal series with 22 or 23 plates. Dorsal fin with I,7, pectoral fin with I,6, pelvic fin with 6 and anal fin with 6 rays. Groundo color yellowish to brown; Hyaline fins, scattered with small dark-brown spots. Maximum standard length. 22.6 mm. Distribution. Middle stretch of the rio Tietê, left bank of the rio Paraná, and streams of the rio Iguatemi and rio Ivinheima, both in right bank of the upper rio Paraná.

Published as part of 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, pp. 1-111 in Neotropical Ichthyology 16 (2) on page 80, DOI: 10.1590/1982-0224-20170094, http://zenodo.org/record/3678395