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Anantrum histocephalum sp. n. is described from Synodus lucioceps, California lizardfish. The larger worm size, mushroom-shaped scolex, vitelline follicle distribution, and larger eggs distinguish this species from A. tortum. The tapeworm was observed in 8.5% of 164 lizardfish from the coastal waters of Los Angeles County.

Six genera and 15 species, 2 new, of myxosporida were recovered from 14 species of California marine rockfish, Sebastes. The spores of Leptotheca sebasta sp. n. are arched with thick, equal shell valves and large round polar capsules. They are greater in width and sutural diameter and more crescentic than L. latesi. Ceratomyxa sebasta sp. n. is crescentic in shape with equal shell valves. The spores of C. sebasta are shorter in sutural diameter, larger in width, and less crescentic than C. hokarari.

Parabothriocephalus sagitticeps (Sleggs 1927) from Sebastes paucispinis is redescribed and given a generic reassignment. The new combination is based on the dorsal, submarginal genital attrium and tests arrangement. The tapeworm prevalence was 84% of 354 rockfish in the coastal waters of Southern and Central California.