Chelemys megalonyx (Waterhouse, 1845) . Proc. Zool. Soc. Lond., 1844:154 [1845].

TYPE LOCALITY: Chile, Valparaiso Prov., Lake Quintero .

DISTRIBUTION: C Chile, Coquimbo Prov. south to Magallanes.

SYNONYMS: delfini, microtis, niger, scalops.

COMMENTS: The association of delfini — retained by Osgood (1943) as a species related to C. macronyx but listed as a subspecies of C. megalonyx by Tamayo and Frassinetti (1980) —needs resolution.