Euparthenia humboldti (Risso, 1826)
Mediterranean.
Ectoparasit on unknown molluscs in the infralittoral and upper circalittoral, among detritic bottoms, corraligene…
Basionym: Turbonilla humboldti.
Synonyms: clathrata, lactea, turriculata.
The species, at left, G. W. Tryon: Manual of conchology, structural and systematic vol. VIII, Philadelphia 1886, plate 77. At right, the taller shell with a stronger structure is bullinea. Tryon confuses the two species.
 
« Whorls 5, and nucleus, rather solid, stout, a little convex, with deep suture, with numerous spiral riblets decussated by longitudinal striae; columella with a strong superior plication; white. » – G. W. Tryon: op. cit. p.345.
The shell is rounder than that of bullinea, with a less marked sculpture.
Young specimen from 10-12m deep, on detritic sand, Vignola bay, Marina di Davia, Corbara, NW. Corsica. 4,6mm.
Original picture provided by S. Clanzig (FR) – (CC BY-NC-SA).
8m deep, Bozcaada island, Çanakkale, W. Marmara, NW. Turkey. 6,7mm.
The protoconch in the genus, planorbiform of type B.
Immature specimen from the same spot. 3,4mm.

— back to Pyramidellidae —