Pfeifferinella gugleri (Apicomplexa: Pfeifferinellidae) in Half-Lidded Ovals, Patera binneyana (Gastropoda: Stylommatophora: Polygyridae), from Oklahoma, USA

摘要

Fecal samples collected in April 2019 from 10 half-lidded ovals, Patera binneyana (Pilsbry, 1899) (Gastropoda), in McCurtain County, Oklahoma, U.S.A., were examined for coccidial parasites. Seven (70%) contained oocysts of Pfeifferinella gugleri Wacha, 1980. Ovoidal octozoic oocysts without sporocysts measured (average L x W) 22.2 x 14.1 mu m with an L:W ratio of 1.5. Oocysts possessed a subspheroidal to spheroidal oocyst residuum as well as a micropyle. This snail represents the fourth host to harbor this coccidian. We document a new host and geographic distribution record for P gugleri.