It possesses dorsal lamella-like structures on the distal part of its gubernaculum, which can also be found on other of its cogenerates.

P. lateolabracis can be distinguished from the former by the lateral caudal mounds separated dorsally, narrower lamella-like structures on its gubernaculum, shorter spicules, and by the testis extending anteriorly.

Seven gonad-infecting species of Philometra can be distinguished from P. priacanthi by their host types, as well as by geographical distribution.

Its amphids are outlined; its oesophagus forms about 9–14% of its body length, and is slightly inflated at its anterior end; its posterior part (oesophagus) is overlapped by a large oesophageal gland with a substantial cell nucleus in the middle.

The distal part of the gubernaculum possesses a transverse lamella-like structure on its dorsal side.