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Atlanta oligogyra Tesch, 1906

This species has a similar shell morphology to Atlanta lesueurii. The main identifying feature is the globular shape of the spire, which is caused by shallow whorl sutures.

  • The spire is very small, with only 2½ whorls and has no ornmentation.

  • The sutures of the spire are shallow, so that the spire is globose. The sutures are often a pink-purple colour.

  • The adult shell can be light pink to yellow and up to 3 mm. Only a single adult whorl is formed, giving the adult shell an elongate shape.

  • The keel is of moderate height and inserts a short way between the final and penultimate whorls.

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


Similar species:

Further Reading:


Richter, G., 1986. Zur Kenntnis der Gattung Atlanta (II). Atlanta lesueuri Souleyet und Atlanta oligogyra Tesch (Prosobranchia: Heteropoda). Archiv für Molluskenkunde 117, 19–31.


Seapy, R.R. 2011. Atlantidae. In: Tree of life web project. Available at accessed 1 April 2017.


Seapy, R.R., Lalli, C.M., Wells, F., 2003. Heteropoda from Western Australian waters., in: The Marine Flora and Fauna of Dampier, Western Australia. Western Australian Museum, Perth, pp. 513–546.


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.

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