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.
Synonyms:
Atlanta gaudichaudii Souleyet, 1852
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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.
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The spire has 3¼ to 3½ whorls.
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The spire and adult shell is much smaller than that of A. peronii (adult is 3 mm compared to 10 mm for A. peronii).
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The keel base is often a yellow or red-brown colour.
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Shell shape, size and keel colouration are very similar to Atlanta plana, however, A. plana has much clearer ornamentation consisting of multiple spiral lines.
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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 http://tolweb.org/Atlantidae 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.
