top of page

Atlanta gaudichaudi Gray, 1850

This species is very similar in size and shape to Atlanta plana, but does not have the numerous spiral ridges on the spire.



Atlanta gaudichaudii Souleyet, 1852

  • There is no obvious shell ornamentation, although a single line can sometimes be seen running around the second and third whorls of the spire using SEM.

  • The spire has 3¼ to 3½ whorls.

  • The spire and adult shell is much smaller than that of A. peronii (adult is 3 mm compared to 10 mm for A. peronii).

  • The keel base is often a yellow or red-brown colour.

  • Shell shape, size and keel colouration are very similar to Atlanta plana, however, A. plana has much clearer ornamentation consisting of multiple spiral lines.

  • Eyes type b, operculum type b, radula type I.


Similar species: 




Further Reading:


Richter, G. 1993. Zur Kenntnis der Gattung Atlanta, 5. Die Atlanta peroni-Gruppe und Atlanta gaudichaudi (Prosobranchia: Heteropoda). Archiv für Molluskenkunde, 122: 189–205.


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, 160:1–25. 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.

bottom of page