Siogamaia
Siogamaia is a small genus of very small sea snails, pyramidellid gastropod mollusks or micromollusks. This genus is currently placed in the subfamily Chrysallidinae of the family Odostomiidae. The genus was originally described as a subgenus of Tropaeas Dall & Bartsch, 1904, but was later erected to a full genus and placed within Chysallidinae by Schander et al..
Shell description
The original genus description, states that Siogamaia is a shell of moderate size with many whorls. The outline is elongate-conical in outline. The surface is marked by weak axial ribs that are mostly shown in the earlier whorls. The interspaces between the ribs are smooth. The Aperture is obliquely ovate with a single distinct columellar fold. The outer lip is smooth within,Life history
Nothing is known about the biology of the members of this genus. As is true of most members of the Pyramidellidae sensu lato, they are most likely to be ectoparasites.Species
Species within the genus Siogamaia include:Siogamaia fortiplicata Siogamaia akasakiensis Nomura, 1936Siogamaia akatiperipherata Nomura, 1936Siogamaia asamusi Nomura, 1936Siogamaia desiderabilis Nomura, 1936Siogamaia kinkwazan Nomura, 1937Siogamaia morioria Siogamaia minamotoi Siogamaia namensis Siogamaia odostomoides Nomura, 1937Siogamaia problematica Siogamaia quantoensis Nomura, 1937Siogamaia semiplicata Siogamaia takonourana- ''Siogamaia venus''