Cryptogemma yokoyamai is an extinct species of sea snail, a marine gastropod mollusc in the family Turridae. Worldwide Mollusc Species Data Base: Comitas yokoyamai
Distribution Fossils of this species were found in Cenozoic and Pliocene strata in Japan.
References
Yokoyama, M., 1920: Fossils from the Miura peninsula and its immediate north. Journal of the College of Science, Imperial University of Tokyo, vol. 39, art. 6, pp. 1–193, pls. 1–20 Oyama, K., 1973: Revision of Matajiro Yokoyama's type Mollusca from the Tertiary and Quaternary of the Kanto area. Palaeontological Society of Japan, Special Papers, no. 17, pp. 1–148, pls. 1–57
External links Taki, I. and Oyama, K., 1954: Matajiro Yokoyama's the Pliocene and later faunas from the Kwanto region in Japan. Palaeontological Society of Japan, Special Papers, no. 2, pp. 1–68, pls. 1–49 University Museum, University of Tokyo: Comitas yokoyamai