Distinguished from its congeners, except for P. carnosus and P. fumosus, by the presence of an enlarged and prominent process of the post-temporal (the "supraclavicular process" of previous authors), which is almost as long as the post-cleithral process; the presence of long hair-like epithelial projections on the skin and long tubular extensions of the sensory pores. Differs from P. carnosus and P. fumosus in having a more slender body (13.0-14.5%SL vs. 14.9-16.7) and possessing lighter colored patches on the body. It further differs from P. carnosus in having a rounded (vs. pointed) tip of the nuchal shield, and from P. fumosus in having less developed procurrent caudal rays that are evenly sloping along the anterior edges (Ref. 54514).

Description: A v,10; V i,5 (Ref. 54514).