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Asthelys
・ Asthelys antarctica
・ Asthelys depressa
・ Asthelys munda
・ Asthelys nitidula
・ Asthelys semiplicata
・ Asthelys simplex
・ Asthena
・ Asthena albidaria
・ Asthena albosignata
・ Asthena albulata
・ Asthena amurensis
・ Asthena anseraria
・ Asthena argentipuncta
・ Asthena argyrorrhytes


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Asthelys : ウィキペディア英語版
Asthelys

''Asthelys'' is a genus of sea snails, marine gastropod mollusks in the family Seguenziidae.
==Description==
The conical shell lacks axial riblets and a peripheral carina but has a punctate microsculpture. The midwhorl angulation is initially absent, but present on later whorls. The shell contains no spiral lirae. The U-shaped posterior sinus is shallow. The basal sinus is present, but there is no anterolateral sinus. The columella has no sinus or tooth. Tha aperture has a rhomboidal shape. There is no umbilical septum.
Radula: the rachidian tooth is broader than high and has lateral wings prominent. The lateral tooth cusp is broad. There are less than 10 marginal tooth pairs.〔(James F. Quinn Jr., (1991), Systematic Position of Basilissopsis and Guttula, and a Discussion of the Phylogeny of the Seguenzioidea (Gastropoda: Prosobranchia), Bulletin of Marine Science, Volume 49, Numbers 1-2, September 1991 , pp. 575-598(24) )〕


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