Data are presented relative to an epidemic die-off of wentletraps, Epitonium clathratulum, under aquarium conditions. Snails, each connected to the end of a self-produced elastic filament uniting a bunch of egg capsules, were observed to become separated from their shells, implicating detachment/atrophy of the columellar muscle. This phenomenon, as well as the die-off itself might represent a normal post-reproductive event, E. clathratulum possibly being an annual species.

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CC BY-NC 4.0 NL ("Naamsvermelding-NietCommercieel")

Nederlandse Malacologische Vereniging

J.C. den Hartog. (1988). An unusual phenomenon observed in Epitonium clathratulum (Kanmacher, 1797) (Prosobranchia: Epitoniidae): live snails becoming separated from their shells. Basteria, 52(1/3), 3–7.