It can be distinguished from the other species by its longitudinal lines along the body (Ref. 48636). Differs from P. cryptus and P. guttatus by having IX, 11 rather than X, 9-10 dorsal rays and males with filamentous extensions on first two rather than the first four interspinous dorsal membranes (Ref. 37816).
- Randall, J.E., G.R. Allen and R.C. Steene 1990 Fishes of the Great Barrier Reef and Coral Sea. University of Hawaii Press, Honolulu, Hawaii. 506 p. (Ref. 2334) http://www.fishbase.org/references/FBRefSummary.php?id=2334&speccode=13770
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