Emarginula fissura (Linnaeus, 1758) |
N. Norway to Canarias, Madeira and lusitanian seamounts to Mediterranean. Predator on sessile preys (sponges) in rocky environment, from the low intertidal to the continental shelf. Jeffreys: « Everywhere on shells and stones, from low-water mark at spring tides to 90f. ; off the Mull of Galloway in 110-145f. (Beechey). […] This variety also occurs in the Red Crag ; it is nearly as high as long » (Brit. Conch. vol. III). Original taxon: Patella fissura. 600m deep, Isola di Ponza, Latina, Lazio, W. Italy. 7mm. |
Synonyms: conica, emendata, fissurata, reticulata… Specimen from English Channel: 30m deep, Paimpol bay, Côtes d’Armor, N. Brittany, NW. France. 7mm. |
The most strongly cancellate and high-spired of all the european members of the genus Emarginula with an apex not overhanging the posterior margin. The primary radial ribs, crossed by concentric cords of a substantially same strength, are separated from each other by a thin and sometimes sharp crest, less elevated. Apex smooth, reflected. 70m deep, Cagliari, S. Sardinia. 12,8mm. Original pictures provided by A. Nappo (IT) for WoRMS – (CC BY-NC-SA). |
The species in J. Thiele: “Scissurelliden und Fissurelliden”, Systematisches Conchylien-Cabinet Bd.2:Abt.4a, Nürnberg 1912, plate VI fig.4-5. |
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