Atlanta inflata Gray, 1850
This species has a shell morphology very similar to A. helicinoidea. The two species can be easily identified if the eyes are present, since A. inflata has eye type a and A. helicinoidea has eye type c.
Atlanta quoyana Souleyet, 1852
Atlanta quoyii Gray, 1850
The spire is flattened with 4¼ to 4½ whorls and is heavily ornamented with multiple continuous spiral ridges. This can make it difficult to identify the whorls, particularly the second whorl which is often narrow.
The spire can be a tan-brown colour, or pink-purple.
The keel is tall, sometimes with a yellow-brown base.
Adult shell is small, reaching only 1.5 mm.
This species has not been found in the Atlantic Ocean.
Eye type a, operculum type c, radula type I.
Janssen, A.W., Seapy, R.R., 2009. On the identity and distribution of Atlanta inflata Gray, 1850 (Gastropoda, Pterotracheoidea, Atlantidae) in the world’s oceans. Basteria 73, 139–157.
Seapy, R.R. 2011. Atlantidae. In: Tree of life web project. Available at accessed 1 April 2017.
Wall-Palmer, D., Burridge, A.K., Goetze, E., Stokvis, F., Janssen, A.W., Mekkes, L., Moreno-Alcántara, M., Bednaršek, N., Schiøtte, T., Vinther Sørensen, M., Smart, C.W., Peijnenburg, K.T.C.A. Biogeography and genetic diversity of the atlantid heteropods. Progress in Oceanography, in press. doi: 10.1016/j.pocean.2017.11.004
Wall-Palmer, D., Metcalfe, B., Leng, M.J., Sloane, H.J., Ganssen, G., Vinayachandran, P.N., Smart, C.W. Vertical distribution and diurnal migration of atlantid heteropods. Marine Ecology Progress Series, 587: 1–15. doi: 10.3354/meps12464.
Wall-Palmer, D., Smart, C.W., Kirby, R., Hart, M.B., Peijnenburg, K.T.C.A., Janssen, A. 2016. A review of the ecology, palaeontology and distribution of atlantid heteropods (Caenogastropoda: Pterotracheoidea: Atlantidae). Journal of Molluscan Studies, 1-14.