Souleyet, 1852
Shell spire of about 6 whorls, with up to 7 and 1/2 whorls in full-grown adult shell. These numbers of spire and total shell whorls are greater than in any other species of atlantid. Spire in lateral view with a broad base and a pointed apex. Spire least strongly inclined among species in this and the previous group. Shell surface smooth, and umbilicus wide. Radula shows a distinct sexual dimorphism, in principle resembling that described for Atlanta peroni and Atlanta fragilis, but still more conspicuous. Marginal teeth of adult males are sharply-curved, short hooks; leaving a characteristic gap between the marginal teeth and the cusps of the lateral teeth. Central tooth with a broad, low basal plate and a long, slender cusp.
See the family Atlantidae for a discussion of the species groups.