The presence of Spiricella unguiculus Rang, 1828, is reported from the Pliocene of the Estepona Basin (Spain). This species, both fossil and present-day, is always extremely rare. So far, no occurrences of the animal have been reported, only the shells are known. It is possible that its unusually long stratigraphical longevity may be artificial and that we are dealing with a series of cryptic species, but at present we do not feel that the separation of fossil and actual populations is justified, based on shell characters alone.

Basteria

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Nederlandse Malacologische Vereniging

Bernard M. Landau, Andre Jansen, & Carlos Marques Da Silva. (2015). Additions to the gastropod assemblage of the Pliocene of Estepona, southwestern Spain, 2. The genus Spiricella Rang, 1828 (Umbraculida; Umbraculidae). Basteria, 79(1/3), 55–58.