Austrolittorina antipodum, known as the banded periwinkle, is a species of small sea snail, a marine gastropod in the winkles and periwinkles family, Littorinidae.
Description The length of the shell attains 19 mm, its diameter 12 mm.
(Original description in Latin) The shell is small, elevated-conic, and acute, featuring a base that is obscurely angled. It is bluish-white in color and encircled by brown bands. The sculpture consists of impressed transverse striae that are set some distance apart. The whorls are flat, and the body whorl is not at all dilated. The aperture, which is shorter than the spire, is blackish-brown and marked by the usual white basal zone. Finally, the columella is depressed and rectilinear.
Distribution This marine species occurs off New Zealand.Powell A. W. B., New Zealand Mollusca, William Collins Publishers Ltd, Auckland, New Zealand 1979 , also at the Kermadec Islands, Stewart Island, Snares Islands and Chatham Islands.
References
Maxwell, P. A. (2009). Cenozoic Mollusca. Pp 232-254 in Gordon, D. P. (ed.) New Zealand inventory of biodiversity. Volume one. Kingdom Animalia: Radiata, Lophotrochozoa, Deuterostomia. Canterbury University Press, Christchurch. Spencer, H.G., Marshall, B.A. & Willan, R.C. (2009). Checklist of New Zealand living Mollusca. Pp 196-219. in: Gordon, D.P. (ed.) New Zealand inventory of biodiversity. Volume one. Kingdom Animalia: Radiata, Lophotrochozoa, Deuterostomia. Canterbury University Press, Christchurch. Brook, F.J., Marshall, B.A. 1998 The coastal molluscan fauna of the northern Kermadec Islands, southwest Pacific Ocean, Journal of the Royal Society of New Zealand, 28 Powell, A.W.B. 1979 New Zealand Mollusca: Marine, Land and Freshwater Shells, Collins, Auckland
Sources Reid, D.G. & Williams, S.T. (2004) The subfamily Littorininae (Gastropoda: Littorinidae) in the temperate Southern Hemisphere: the genera Nodilittorina, Austrolittorina and Afrolittorina. Records of the Australian Museum 56: 75122