Species: Cathorops tuyra, Besudo sea-catfish

Cathorops tuyra (Meek & Hildebrand, 1923)

Besudo sea-catfish

Body moderately elongate; head small; snout long, pointed; top of head rough on rear half, covered with thin skin; central groove in top of head narrow, front part snout short or absent, rear part behind eye, with straight, tapering edges; bone projecting back from head shield triangular, with wide base, longer than wide, with a central keel, its length 11.2-13.7%SL; plate before dorsal spine with length 6.7-7.5%SL; 3 pairs of barbells (on chin and both jaws); mouth small; lips fleshy, often thick; lower jaw bones very wide, with large molar teeth at rear; teeth at front of top jaw fine, in two articulated patches; one pair of well separated, oblique, elongated patches of large molariform teeth on roof of mouth; gill opening restricted to sides by adhesion of gill membranes to breast; gill rakers 19-22; rakers on posterior surface of all arches; dorsal rays I,7, spine at least as thick as pectoral spine; anal rays 19-20; pectoral rays I, 10-11;tail fin lobes narrow and pointed.