Megasurcula yokoyamai is an extinct species of sea snail, a marine gastropod mollusk in the family Pseudomelatomidae, the turrids and allies.
Distribution
Fossils of this marine species have been found in Middle Miocene strata in Japan.
References
- Otuka, Y., 1934a: Tertiary structures of the northwestern end of the Kitakami mountainland, Iwate Prefecture, Japan. Bulletin of the Earthquake Research Institute, Tokyo Imperial University, vol. 12, pt. 3, pp. 566âÂÂ638, pls. 44âÂÂ51
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