Philometra (Ranjhinema) salgadoi n. sp. (Nematoda: Philometridae) from the ocular cavity of the red grouper Epinephelus morio (Pisces: Serranidae) from the yucatan peninsula, Mexico.

A new nematode species, Philometra (Ranjhinema) salgadoi n. sp., is described from females found in the ocular cavity of the red grouper (Epinephelus morio) from the Mexican coast of the Gulf of Mexico (type locality Telchac, Yucatán). The nematode is characterized by the presence of 8 conspicuously large, crescent-shaped, fleshy cephalic papillae of the external circle and 2 small, subterminal papilla-like projections on the caudal end. Another philometrid species, Philometroides belousae n. sp., is established by indication for P. parasiluri (Yamaguti, 1935) sensu Ermolenko, 1984; its adult females are parasitic in the subcutaneous tissues of Percottus glehni in the Russian Far East.