Monotygma pareximia
Monotygma pareximia is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.

References

 Nomura, S. (1936). Pyramidellidae from Siogama Bay, Northeast Honsyu, Japan. Saito Ho-On Kai Museum Research Bulletin. 10: 1-108, pls. 1-12
 Okutani T., ed. (2000) Marine mollusks in Japan. Tokai University Press. 1173 pp.

Pyramidellidae
Gastropods described in 1936