Rhamdia guatemalensis ( Günther 1864: 122 )

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

(6) Rhamdia guatemalensis ( Günther 1864: 122) ; Cat- fish (En), Barbudo (Sp)

Figure 3A

Body very elongate; 3 pairs of barbels, maxillary barbels relatively long (usually extending beyond the pectoral fin origin, sometimes passing the caudal fin origin); scales absent; fins with strong spines; serrations present on both margins of the pectoral fin spine; 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 dis- tance 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 white, ventrally; the dorsal and caudal fins are dusky and the paired and anal fins are almost transparent or white; maximum body length ca 270 mm SL.