Abstract
Murexiella perculta, sp. nov., from the middle Miocene of Victoria, is the first recorded occurrence of the genus Murexiella s.s. in the fossil record of Australia. Comparison is made with the Pliocene-Recent group of Murexiella (Subpterynotus) and it is concluded that this new species is not in the line of the latter group, but is most nearly related to the ancestral Murexiella s.s. species, such as M. steuri (Cossmann), from the middle Eocene of France.