Allencotyla pricei sp. n. (Microcotyloidea: Heteraxinidae) from the gills of the pile surfperch, Damalichthys vacca (Girard), in southern California

Allencotyla pricei sp. n. (Monogenea: Heteraxinidae) from the gills of pile surfperch, Damalichthys vacca (Girard), from Redondo Beach, California is described. This species is distinguished primarily by the prebifurcal position of the genital atrium and vagina, and by possessing an elongate esophagus. The systematic arrangement of microcotyloid forms characterized by an asymmetric haptor is discussed.