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Diagnosis: Spheroidal to ovoidal shell, with tubular peristome, with 3 or 4 aboral spines arising from near aboral pole, with 3 or 4 straight or slightly curved oral spines originating from lip of peristome. Pores at base of oral and aboral spines.

Length (including peristome): 0.7-1.5 mm.

Tuscarilla ampulla