Rhamdia nicaraguensis ( Günther 1864: 125 )

Angulo, Arturo, Naranjo-Elizondo, Beatriz, Rojas, Emmanuel & Ley-López, Juan Manuel, 2017, Fishes from the Tirimbina Biological Reserve, La Virgen de Sarapiquí, Heredia, Costa Rica, Check List 13 (5), pp. 683-702 : 689

(8) Rhamdia nicaraguensis ( Günther 1864: 125) ; Catfish (En), Barbudo (Sp)

Figure 3C

Body very elongate; 3 pairs of barbels, maxillary barbels usually extending beyond the dorsal fin origin up to the pelvic fin insertion; scales absent; fins with strong spines; serrations present only on the inner (posterior) margin of the pectoral fin spine, or absent; a single dorsal fin; adipose fin present, its base larger than the base of the dorsal fin and occupying about 75% or more of the distance between the dorsal fin insertion and the origin of the caudal fin; caudal fin forked; general coloration brownish gray, darker dorsally, usually dark gray to tan, and paler, usually yellowish white or almost white, ventrally; the dorsal and caudal fins are dusky and the paired and anal fins are almost gray, transparent or white lightly pigmented; maximum body length ca 260 mm SL.