Iracema Triques, 1996

Carvalho, Tiago P. & Albert, James S., 2011, Redescription and phylogenetic position of the enigmatic Neotropical electric fish Iracema caiana Triques (Gymnotiformes: Rhamphichthyidae) using x-ray computed tomography, Neotropical Ichthyology 9 (3), pp. 457-469 : 458-459

Iracema Triques, 1996

Type species. Iracema caiana Triques, 1996a: 91 by original designation and monotypy.

Diagnosis. Iracema is distinguished from other rhamphichthyids by the following characteristics: 240-257 analfin rays (vs. 139-211 in Gymnorhamphichthys and 304-470 in Rhamphichthys ); 15 or 16 pectoral-fin rays (vs. 10-13 in Gymnorhamphichthys and 17-22 in Rhamphichthys ); a series of dark, rounded pigment blotches on the side of the body along the lateral line (vs. no pigmentation in Gymnorhamphichthys and dark oblique transverse bands or no pigmentation in Rhamphichthys ); caudal filament ovoid in cross section, its depth slightly greater than its width (vs. caudal filament laterally compressed in cross section, its depth about three times its width in Gymnorhamphichthys and Rhamphichthys ).