Austrotoma prolixa is an extinct species of sea snail, a marine gastropod mollusk in the family Pseudotomidae.
Description The shell is noticeably attenuated, featuring straight-sided whorls and a subsutural fold that ranges from weak to moderate in strength. The shoulder carina is sharply angled, while the spirals on the base are widely spaced.
Distribution Fossils have been found in Lower Pliocene strata at Hawera, New Zealand.
References
Laws, C.R. (1940) Paleontological study of Nukumaruan and Waitotaran rocks near Wanganui. Transactions of the Royal Society of New Zealand, 70, 34–56, pls. 5–7. 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.