The radula of a species of Pickworthiidae, Astrosansonia dautzenbergi (Bavay, 1917) n. comb., is described for the first time. However, its generalized taenioglossate morphology does not allow a conclusive allocation to a superfamily. Liotia dautzenbergi Bavay, 1917, is made the type of the new genus Astrosansonia n. gen., characterized by a planispirally coiled teleoconch, and Liotia micraster O. Boettger, 1907, from the Miocene of Paratethys, is refered to it. Mecoliotia philippina Bandel & Kowalke, 1997, is made the type of the new genus Clatrosansonia n. gen., characterized by a finely reticulated sculpture identical on the base and spire, and a perfoliated peristome; six Recent species from the Atlantic and Indo-Pacific are referred to it. Nine new Recent Indo-Pacific species are described in five genera: Clatrosansonia troendlei n. gen., n. sp., Mareleptopoma drivasi n. sp., M. intermedia n. sp., M. pellucens n. sp., M. vaubani n. sp., Microliotia alvanioides n. sp., Reynellona bollandi n. sp., R. borbonica n. sp., and Sansonia alisonae n. sp. A checklist of the currently known Recent (60) and Caenozoic fossil (6) species of Pickworthiidae is compiled. The Cretaceous genus Urceolabrum Wade, 1916 is not treated as a member of the Pickworthiidae, but its family position in the Caenogastropoda remains uncertain.
Mollusca, Caenogastropoda, Pickworthiidae, Indo-Pacific, microgastropods, submarine caves, new genera, new species.