Sixty fusulinid species, 17 of which are newly named, are herein described from the Lower Permian part of the Owens Valley Group in east-central California. These consist of 2 species of Triticites, 1 of Leptotriticites, 16 of Schwagerina, 1 of Pseudofusulina, 3 of Chusenella, 1 of Paraschwagerina, 9 of Stewartina, 6 of Pseudoschwagerina, 3 of Chalaroschwagerina, 6 of Cuniculinella, 3 of Eoparafusulina, and 6 of Parafusulina. In addition, a new genus, Reticulosepta (with three species), is described.

The fusulinid fauna of the Owens Valley Group contains some elements of the Pseudoschwagerina association of the Texas-Cordilleran region and a few species similar to those of the Chalaroschwagerina association of the eastern Klamath Mountains. In addition, several species apparently are endemic. Most of the fusulinids are from sediment-gravity-flow deposits in which there was apparently a great deal of mixing of faunas from different coexistent environments. In general, however, there is little evidence of mixing through reworking of older faunas, which has allowed biostratigraphic subdivision of the Lower Permian part of the Owens Valley Group based on fusulinids. The subunits recognized—lower Wolfcampian, middle Wolfcampian, upper Wolfcampian, and Leonardian—are comparable to subunits of the Lower Permian based on fusulinids in other parts of North America.