Journal
ALCHERINGA
Volume 34, Issue 3, Pages 375-384Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/03115518.2010.488117
Keywords
chelid pleurodires; Eupleurodira; Albian; high latitude; warm palaeoclimate; Australia
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Fragments of plastron and vertebrae from the Griman Creek Formation (middle Albian) at Lightning Ridge, New South Wales, extend the Australian record for chelid pleurodires back in time by over 50 my. Contemporaneous with the oldest known occurrences of chelids in Patagonia, this record indicates that during globally warm intervals, pleurodire distribution included high palaeolatitude locations. Although referred to Chelidae, the material shows no characters to enable more detailed taxonomic assessment and it is unclear whether known genera are represented. The diverse and prolonged history of chelids in South America and Australia indicates that the basal eupleurodiran divergence occurred deep in the Jurassic.
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