Rissoina pusilla is a species of small sea snail, a marine gastropod mollusc or micromollusc in the family Rissoinidae.
Description Only in fossil state.
Distribution This species occurs in the Indian Ocean off Madagascar.
References
Dautzenberg, Ph. (1923). Liste préliminaire des mollusques marins de Madagascar et description de deux espèces nouvelles. J. conchyliol. 68: 21-74