Lirularia yamadana is a species of small sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.Bouchet, P. (2014). Lirularia yamadana (E. A. Smith, 1875). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=732093 on 2014-07-12
Description The height of the shell attains 6 mm, its diameter 4½ mm. The ovate-conical, slightly perforate shell is dull whitish. It is painted on the lirae with lilac-brown tessellations, somewhat formed into flammules. The five whorls are convex, and separated by profound sutures, ridged by delicate spiral lirae articulated with lilac-brown (5 to 6 on penultimate, about 20 on the body whorl). The shell shows oblique incremental lines. The pearly aperture is circular, equalling ½ the total length. The columella is a trifle thickened. The terminations of the peristome are joined by a thin callus.
The elongate brownish-lilac spots on the lirations are situated somewhat irregularly underneath each other, so as to form flammulations.H. Pilsbry (1889), Manual of Conchology XI, Academy of Natural Sciences, Philadelphia (described as Gibbula yamadana)
Distribution This marine species occurs off Japan.
References
Higo, S., Callomon, P. & Goto, Y. (1999) Catalogue and Bibliography of the Marine Shell-Bearing Mollusca of Japan. Elle Scientific Publications, Yao, Japan, 749 pp.