Microphysula cookei (Pilsbry 1922)
Pristilomatidae, Stylommatophora, Gastropoda, Mollusca, Animalia
(no pictures are currently available)
Identification: Shell up to 2.5 mm diameter, 1.1 mm high, with about 4 whorls; spire nearly flat; umbilicus completely closed; animal white.
Etymology: pristys – a saw, loma – border, alluding to the serrate marginal lip of P. lansingi; named for Professor O. B. Johnson.