Original taxon: Atlanta lesueurii. Synonym: crossei.
Spire depressed; whorls smooth, apart some faint growth lines; marked suture; umbilicus narrow and deep, with some thin spiral striations around. The picture shows a grain inside the aperture; in no way it relates to a columellar plication.
400m deep, off Alborán island. 0,5mm.
« Shell orbicular, trochiform, wider than it is tall, thin, diaphanous, smooth, shiny, rounded to the left; umbilicus very narrow, often scarcely marked; spire high, conical, with a slightly obtuse summit, composed of five whorls, separated by well-marked sutures; aperture oblique, rounded laterally, and almost angulated near the columella; this one straight, with thin edges, sharp, cut straight without sinuses. The shell is of a beautiful transparent white. […] Lesueur’s Atlanta inhabits the two great Atlantic and Pacific oceans, in all the temperate zone, that is to say 36 degrees north and south of the line, equal to a width of 1440 nautical leagues, all over the warm part of these great seas. Like other species, it is crepuscular or even nocturnal, for it only appears on the surface of the waters at the beginning of the night. It is quite rare, and its great fragility, as well as its smallness, make it very difficult to observe. »
