Crisilla beniamina (Monterosato, 1884) |
Mediterranean. Grazer and detritus feeder on infralittoral bottoms. Often found in Posidonia rhizomes. Original taxon: Cingula beniamina. Synonym: concinna. 42m deep, Scilla, Reggio Calabria, SW. Italy. 1,5mm. |
Same spot. 1,25mm. |
Rissoa concinna in H. C. Weinkauff: “Die Gattungen Rissoina und Rissoa”, Systematisches Conchylien-Cabinet Bd.1:Abt.22, Nürnberg 1885, plate XVIII, fig.11. Fig.10 reproduces Crisilla picta (Jeffreys, 1867) and fig.12 shows Crisilla depicta (Manzoni, 1868). Both species occur in NE. Atlantic (Madeira, Canarias) but not in Mediterranean. |
Weinkauff, op. cit. p.152: « Shell egg-shaped and conical, thin, translucent, amber-coloured, decorated with several rows of reddish brown spots; the last whorl usually bears a series of larger square patches under the suture, followed by a series of finer points just below, then two very fine lines and further down two rows of square patches; the spire is conical and rather tall, with a flat apex. The five whorls are only slightly arched and increase regularly; they are separated by a fairly distinct suture; their sculpture consists only of very fine lines. The mouth is a little angular-oval, pointed above, slightly angled down, the columella is oblique, the edge of the mouth sharp, simple. » – Scilla, 50m deep. 1-1,75mm. |
100m deep, off Alborán island. 1mm. |
50-80m deep, Málaga, Andalucia, S. Spain. 1,5mm. |
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