Steromphala racketti (Payraudeau, 1826)
Abundant in some sparse places of Mediterranean.
Grazer and deposit feeder in the shallow infralittoral.
Original taxon: Trochus racketti.
Synonyms: gibbosula, pseudotumida, pygmaea.
Shallow water on rocks, Bajo Piedras, Málaga, Andalucia, S. Spain. 6mm.
Variants albidoconica, aperta, depressula, pervia…
2m deep, under stones, Mijas, Málaga. 6,5mm.
« Testâ parvâ, conicâ, umbilicatâ, transversìm striatâ, albo-virescente ; anfractibus quaternis, convexis, lineis obliquis parvulis rufis pictis, suprà suturas latioribus; spirâ obtusâ; umbilico angusto; aperturâ albâ. […] It is olive-white with russet spots on the sutures; these spots are finer and in an oblique direction on the middle of the whorls; the aperture is white and the umbilicus a little convoluted. Dedicated to Mr. Rackett, English conchyliologist. » – B. C. Payraudeau: Catalogue descriptif et méthodique des Annelides et des Mollusques de l’île de Corse, Paris 1826, p.128.

Specimens from La Goulette, Tunisia. 3,3-4,1mm.
Original pictures provided by M. Antit for WoRMS
– (CC BY-NC-SA) –
Syntype MNHN-IM-2000-28252 from the collection Payraudeau in the Muséum national d’Histoire naturelle, Paris (France). « Valinco (Corsica). Very rare. » Original pictures provided by M. Caballer for the MNHN – (CC BY).
A specimen with the same set of colours, from 2m deep, on Posidonia, Baccu Mandara, east of Cagliari, S. Sardinia. 3,6mm. Original pictures provided by A. Nappo (IT).
– (CC BY-NC-SA) –
Shallow water, on Posidonia leaves, La Ahozía, Murcia, SE. Spain. 5,2-5,4mm.
Juvenile from shallow water, Vignola Bay, Marina di Davia, Corbara, NW. Corsica. 2mm.

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