Bullinularia devexa Coûteaux et Munsch, 1978
Diagnosis: Shell elliptical in oral view, dorsal side domed, ventral side sloping with ventral lip of pseudostome with a thickened border, and concealed by a curved, sometimes scalloped, dorsal lip, pierced with several pores randomly arranged. Pseudostome mostly with the corners in the shape of an eight. Shell very dark and opaque, surface fairly smooth.
Dimensions: Length: 124 – 170 µm (± 162.0 µm); Width: 97 – 149 µm (± 137.5 µm) (n=10).
Ecology: litter, soil and rhizosphere of epiphytes in mangrove, Guadalupe.