Mathildidae

Abstract: Based on shell characters, two new gastropod species of the family Mathildidae Dall, 1889, are herein described from the Mediterranean Sea. The new taxa are compared with the similar Mathilda barbadensis (Dall, 1889), an amphi-atlantic mathildid recently reported from the Mediterranean Sea. The new species are clearly distinguishable from M. barbadensis, as well as from the other Mediterranean and Eastern Atlantic members of the family on the base of their teleoconch shape and sculpture, and protoconch morphology. The occurrence of M. barbadensis in the Mediterranean basin is also critically discussed.

Abstract: Based on shell characters, two new species of the family Mathildidae Dall, 1889, are herein described from the south-eastern coast of Africa The new species are clearly distinguishable from all the members of the family occurring in the Indian Ocean and Mozambique Channel on the base of their teleoconch shape and sculpture, and protoconch morphology

Abstract: The Paleocene gastropod species described asTrochus alabamensisAldrich, 1886 has long been considered a member of the vetigastropod genusSolariella. Newly collected material from Mississippi’s Matthews Landing Marl Member of the Porters Creek Formation (Late Paleocene: Selandian) with well preserved anastrophic protoconchs provides evidence that this species belongs to the Heterostropha/Heterobranchia. A redescription is provided and a discussion of its characters leads to placement in the family Mathildidae. A new genus,ToulminellaBieler & Dockery, is introduced for it.