Abstract
A new pterosaur specimen comprising a partial skull and associated postcranial elements from the Lower Cretaceous Wessex Formation of Yaverland, Isle of Wight, southern England, is assigned to a new genus and species of ornithocheirid pterosaur, Caulkicephalus trimicrodon gen. et sp. nov., based on several unique features including a heterodont dentition in which the fifth, sixth and seventh teeth are reduced in size compared with those at positions 1–4 and 8–9; the presence of a frontoparietal crest and maxillopremaxillary crest that do not unite over the antorbital fenestra or cranium; a palatal ridge that extends no further forward than the eighth to ninth tooth pairs. The new taxon is the second species of pterosaur from the Wealden Group of the Wessex Basin.
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