Fig. 36
Body elongated; greatest depth contained 3.8 to 6.0 and caudal peduncle depth 5.1 to 6.1 times in SL; head length 3.1 to 4.2, predorsal distance 1.5 to 2.1, and gonopodium length 2.7 to 3.6 in SL; snout length 2.6 to 3.5, horizontal orbital diameter 1.8 to 2.5 and least interorbital width 1.5 to 2.1 in HL. Mouth superior, dentary prognathous; premaxilla and dentary with several small teeth. Longitudinal series with 29-31 scales and transverse series with 8 scale rows. Dorsal fin with 8 or 9 rays, pectoral fin with 9-12, pelvic fin with 6, and anal fin with 8 or 9 rays ( Graça, Pavanelli, 2007). Ground color yellowish to pale brown; scales with dark-brown border, conferring reticulate pattern to body (except on ventral region, from one series below pectoralfin origin). Fins yellowish; dorsal fin with dark-brown blotch on distal portion; males with dark-brown transverse bar on caudal-fin base.
Maximum standard length. 30.0 mm.
Distribution. Upper rio Paraná, rio Parnaíba and rio São Franciso basins.
Remarks. Pamphorichthys hollandi was identified as Pamphorichthys sp. by Graça, Pavanelli (2007).