Iberoccitanemys atlanticum (Lapparent de Broin & Murelaga, 1996) n. comb.: new data on the diversity and paleobiogeographic distributions of the Campanian-Maastrichtian bothremydid turtles of Europe

Bothremydidae is the most abundant clade of turtles in Campanian and Maastrichtian (Upper Cretaceous) fossil record southwestern Europe. Several members Foxemydina Gaffney, Tong & Meylan, 2006 are known an area that includes Southern France North-Eastern half Spain. The problematic ‘Polysternon’ atlanticum worst characterized, lacking a diagnosis allows its specific validity to be confirmed, whose generic attribution has been recognized as doubtful. Its presence was exclusively proposed type locality, upper quarry Laño, Treviño County (Burgos Province, North Spain). Despite fact knowledge about markedly increased after description Lapparent de Broin Murelaga, 1996, no new information this species published since 1990s. analysis unpublished material bothremydid from Laño us confirm species. As consequence study, it not only identified but also other Spanish regions south France. diversity Baur, 1891 Upper Cretaceous Europe lower than previously considered. Thus, ‘Iberoccitanemys convenarum’ (Laurent, Claude, 2002), originally defined for French record, subsequently Spain, here synonym described Laño. An emended Maastrichtian, Iberoccitanemys (Lapparent 1996) n. comb., proposed.