Subcircular disc, width less than 70% total length; medium head (ventral length exceeding 30% total length) and snout (length to eye less than about 16% total length); broad, cartilaginous interorbit exceeding 4% total length; internasal flap skirt-shaped, diverging slightly; no broad lobes on posterolateral border of nostrils; inner margin of spiracle oblique; lateral tail folds absent or rudimentary; no dorsal fin; apices of pelvic fins rounded; 7-10 oral papillae along a 'W' line on mouth floor; 95-102 pectoral fin radials; total vertebrae rarely exceeding 150; dorsal surface greyish brown (Ref. 51067).