TL;DR: Turtles of the total clade Pan-Chelydridae have a relatively sparse fossil record that reaches back to the Late Cretaceous (Santonian) but spread along unclear routes to Asia and Europe during the Paleocene, only to go extinct on those continents by the end of the Pliocene.
Abstract: Turtles of the total clade Pan-Chelydridae have a relatively sparse fossil record that reaches back to the Late Cretaceous (Santonian). The clade was only present in North America during the Cretaceous but spread along unclear routes to Asia and Europe during the Paleocene, only to go extinct on those continents by the end of the Pliocene. Final dispersal to South America took place at some time during the late Neogene. The ecology of stem chelydrids seems to have been similar to that of the extant Chelydra serpentina, although more primitive representatives were more molluscivorous as inferred from their broader triturating surfaces. Current phylogenies only recognize five internested clades: Pan-Chelydridae, Chelydridae, Chelydropsis, Chelydra and Macrochelys. A taxonomic review of the group concludes that of 31 named fossil taxa, 8 are nomina valida, 10 are nomina invalida, 9 are nomina dubia, 1 is a nomen nudum and 1 is a regular, unavailable name.
TL;DR: It is the first report of a chelydrid turtle in the Pliocene of the Iberian peninsula and thereby better documents the space and time distribution of snapping turtles before their supposedly rapid disappearance in Europe.
Abstract: The late Pliocene locality Camp dels Ninots is a fossil Lagerstatte that yielded an exceptionally well preserved vertebrate fauna. Several turtles were reported from this locality and were all assigned to the living species Mauremys leprosa. We describe here a second turtle taxon based on carapace material. This new taxon is identified as Chelydropsis cf. pontica. It is the first report of a chelydrid turtle in the Pliocene of the Iberian peninsula. This discovery extends the range of the species to the southwest of Europe and thereby better documents the space and time distribution of snapping turtles before their supposedly rapid disappearance in Europe.
TL;DR: In this article, the holotype (and hitherto single) specimen (part and counterpart) of Chelydra strausi Schmidt, 1966 from the Late Pliocene of the former clay pit of Willershausen (Lower Saxony, northwestern Germany) is revised for the first time.
Abstract: The holotype (and hitherto single) specimen (part and counterpart) of Chelydra strausi Schmidt, 1966 from the Late Pliocene of the former clay pit of Willershausen (Lower Saxony, northwestern Germany) is revised for the first time. The main result of the present study is that it belong to the extinct genus Chelydropsis Peters, 1858, where it is preliminary assigned to Ch. aff. nopcsai (Szalai, 1934).