Further Archaeogastropoda from the Campanian of Torallola, northern Spain

Abstract

18 archaeogastropod species are described from the Campanian of Torallola in north-eastern Spain, including 13 new species and one new genus. They are assigned to the Liotiinae, Colloniinae, Turbininae, Skeneidae and Cirridae. Our species of the Liotiinae are comparable with Recent as well as Triassic liotiids, the documented colloniids show close relations to modern species. Certain members of the Angaria-Astraea-Turbo-relation are difficult if not impossible to distinguish on shell characters alone, although these shells can be traced back into the Triassic. Three skeneiform species are assigned to Recent Skenea, but neither fossil nor recent Skeneidae are sufficiently well known, so our treatment remains preliminary. The new genus Torallochus is introduced for species having initially planispiral coiling that later changes to turriform coiling, and which are sculptured with strong ribs or spines on the periphery. The systematic position of this genus within the Trochoidea remains uncertain. Among the Cirridae, the genus Shikamacirrus  is synonymized with the older name Sensuitrochus, and the youngest member of this genus is described. The new species are Pseudoliotina stinnesbecki, Arene mcleani, Homalopoma schroederi, Astraea iredalei, Astraea batalleria, Astraea hickmanae, Astraea? sohli, Skenea wareni, Skenea suturata, Skenea torallensis, Torallochus rempensis, Torallochus pupiformis, and Torallochus discus.