Austrotoma clifdenica is an extinct species of sea snail, a marine gastropod mollusk in the family Pseudotomidae.
Description The holotype has a shell length of 36.7 mm, (estimated) 84 mm; its diameter 15.2mm. (source-attribution}}
Distribution Fossils have been found in Lower Miocene strata at Southland, New Zealand.
References
Beu, A.G. & Maxwell, P.A. (1990) Cenozoic Mollusca of New Zealand. New Zealand Geological Survey Paleontological Bulletin, 58, 1–518. 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.