Family EPALXELLIDAE Corliss, 1960

(for Epalcidae and Epalxidae)

"Chunky" forms, generally with short posterior spines and no cirri; somatic ciliature relatively dense (in its short anterior and posterior kinetal segments); some species with well-developed "tooth" (spine) overhanging hidden buccal cavity; macronuclear number variable; found in polysaprobic habitats, principally fresh-water, but a few Epalxella in marine biotopes.

Epalxella Corliss, 1960 (for Epalxis). Several species.
Pelodinium Lauterborn, 1908. Single species.
Saprodinium Lauterborn, 1908. Several species.