Shell thin, cylindrical, slender spindle-shaped, telescopic. It is formed by more or less convex whorls, ending with an evident, but not canaliculated, suture. The sculpture consists only of flat spiral cords with narrow, somewhat punctured, interspaces. The columella shows a weak fold.
brownish, with a lighter colouration near the columellar zone.
common size :
up to 5-7 mm in height.
No closely related species are present among the Mediterranean species of Pyramidellidae: among this group of Gastropods (see taxonomical remarks), Adelactaeon fulvus is distinguishable for having a telescopic shell with only spiral sculpture. A. fulvus is distinguishable from A. amoenus (A. Adams, 1851), mainly on the basis of the shell shape, which is cylindrical and slightly cyrtoconoid but not as globose as in A. amoenus (Micali and Palazzi, 1992).
BIOLOGY / ECOLOGY
Pyramidellids are ectoparasites, mainly of sedentary polychaetes and molluscs.
the only information available about the habitat of this species is that from Israel records, reporting shells dredged from 9 to 22 m depth.