Rissoa monodonta Philippi, 1836
Alborán, W. Mediterranean, Adriatic.
Possibly also in NE. Mediterranean.
Grazer and detritus feeder, in the infralittoral and the circalittoral, peculiarly around Cymodocea nodosa medaows.
25m deep, on sand, Cittadella del Capo, Cosenza, Calabria, SW. Italy. 5,6mm. Original pictures provided by A. Nappo (IT).
(CC BY-NC-SA)
« Testa oblongo-conoidea, acuta, laevissima, pellucida, hyalina, anfractibus planulatis; labro intus marginato; columella basi unidentata. » – R. A. Philippi: Enumeratio molluscorum Siciliae vol. I, Berlin 1836, p.155.

100-150m deep, Motril, Granada, Andalucia, S. Spain. 5mm.
The species is close to auriformis Pallary but is slifghtly taller, with a more reduced last whorl, a more pointed apex, and a labial margin less expanded. – Young specimen from the badia de Polilles, Port-Vendres, Eastern Pyrenees, S. France. 4mm.
Phillippi: « Saepe specimina recentia lineis pallidis rufo corneis in ziczac flexis ornata sunt. » – Genoveses, Almería, Andalucia, among Cymodocea seagrass. 6,3mm. Original pictures provided by S. Gofas for WoRMS (CC BY-NC-SA).
5-10m deep, Ježinac beach, Split, S. Croatia. 5,3mm.
Original pictures provided by N. Lete (HR) – (CC BY-NC-SA).

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