Bullinularia devexa Coûteaux and Munsch, 1978
Diagnosis: Test 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.