Habitat: it is a pelagic species.
Distribution: it is a cosmopolite species frequently found all over the Mediterranean.
Imaged shells: all of them were found into rubble samples collected in several zones of the Tuscan Archipelago (Italy). Notes: it is one of the few species easily classifiable among those belonging to this Family and, perhaps, the most common one. The main characteristics are the brown colour pattern (sometimes violet in colour too) and the first whorls of spiral which have a typical sculpture and which are very protuberant, vertically, from the plane of the last whorl which is smooth, planispirak with broad suture. Aperture almost roundish in form, with one crack deep and narrow on the external margin. Carina colourless, quite clear and it starts from the peristome increasing about half whorl gradually, then it decreases up to the internal lip. Embryonal whorls have a sculpture made by spiral lines a little bit undulating, clearer on the first whorls. In transparency, on the shell, there can be noted very soft small pits, sometimes arranged in parallel lines.
Even the juvenile forms are easily recognizable for their peculiar sculpture and protoconch form. Operculum corneous. The adult specimens average measures are around 1.5-2 mm in diametre. It is among the smallest Atlantidae all over the Mediterranean.