Aegista tumida is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Camaenidae.MolluscaBase eds. (2024). MolluscaBase. Aegista tumida (Gude, 1901). Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=1332098 on 2024-05-23
Subspecies Aegista tumida cavata (Pilsbry, 1902) Aegista tumida tumida (Gude, 1901)
Description The diameter of the shell attains 15.5 mm, its height 13.5 mm.
(Original description) This species differs from the type in several key aspects: it is darker in color, has more tumid whorls, a higher spire, and a wider umbilicus. Additionally, the cuticular lamellae are much less pronounced. One specimen exhibits a pale peripheral band, giving the shell a strong resemblance to Aegista oculus (L. Pfeiffer, 1850).Gude, G. K. (1901). A third report on helicoid land-shells from Japan and the Loo-Choo Islands. Proceedings of the Malacological Society of London. 4: 191-200
Distribution This snail occurs on Honshu Island, Japan.
References
Minato, H. (1988). A systematic and bibliographic list of the Japanese land snails. H. Minato, Shirahama, 294 pp., 7 pls.