Melanella compactilis (Locard, 1891)
Mediterranean.
Ectoparasite of the Holothurian Ocnus planci (Brandt, 1835) in the shallow infralittoral down to the upper circalittoral.
Original taxon: Eulima compactilis.
The shell is completely smooth.
 
Locard describes this shell by comparing it to others: it is smaller than Eulima bilineata, almost as tapered as Eulima glabra, but with a more rounded last whorl and therefore a less narrow aperture. The colour is uniform, of a « pale rufous [which, in fact, may be due to the colour of the animal by transparency], without decurrent bands. » – A. Locard: “Les coquilles marines des côtes de France”, Annales de la Société Linnéenne de Lyon vol. 37, Lyon 1891, p.135.

70m deep, Hvar channel, Split-Dalmatia Comitat, S. Croatia. 4mm. Original pictures provided by R. Stanić (HR).
(CC BY-NC-SA)

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