Cosmasyrinx makiyamai is a species of sea snail, a marine gastropod mollusc, unassigned to a family within the superfamily Conoidea.
This species is unassessed and therefore uncertain.
Distribution This marine species occurs off Japan
References
External links Shuto, Tsugio. "Conacean gastropods from the Miyazaki group." Memoirs of the Faculty of Science, Kyushu University Ser. D Geology 11.2 (1961)