Published online by Cambridge University Press: 01 May 2009
The occurrence, very rare in Karroo rocks, of a gastropod species in the Lower Beaufort stage (Upper Permian) of Southern Rhodesia is recorded. It is a small form apparently related to species found in the Tartarian stage of the Russian Permian. These species have been described under extinct marine genera, but on account of their morphology and non-marine habitat this is thought to be inappropriate. The new species much resembles some representatives of the modern genus Hydrobia, not previously recognized in pre-Mesozoic rocks, and it has been decided to describe it as a new species, Hydrobia gondwanica.