(Family):Lower jaw with many barbels. Two lowermost pectoral rays free. (Genus):Jaws without tooth. Posterior end of perifacial rim not ending as spine, if spine present shorter than eye diameter. No spine on midline of snout. (Species):Posterior end of perifacial rim slightly forming obtuse angle. Three ridges present beneath perifacial rim on preopercle, a uppermost ridge among them larger and with strong serration directing forwardly. Opercular ridge smooth, its posterior end spinous. A hemicyclic ridge present at posterior region of lower jaw. Near base of rostral exsertion with a spine. A single nasal spine present or absent. Preocular spines 3〜5. A single supraocular spine present or absent. A single postocular spine present. Lower jaw with 12〜14 barbels on one side, longest one bearing branches 62〜73% of HL. Scales in 4 rows, 26〜27+1, 31〜32+1, 24〜25+1, 21〜22+0 (from top to bottom row, + indicates scale on caudal fin). Orbit diameter 29〜31% of HL.
Distribution:
Off Suriname.
Remarks:
This species is very similar to P. miniatum, but orbit diameter of this species is remarkably greater than that of P. miniatum. (Uyeno and Sato)