The holotype of W. evansae - an isolated azygous frontal, in dorsal (left) and ventral (right) view, from the Lower Cretaceous of the Isle of Wight, southern England.
Wesserpeton is known from the holotypeNHMUK PV R36521, nearly complete fused frontals and from the referred materials NHMUK PV R36522–36568 and R36595–36611. All specimens were collected from seven localities of the Wessex Formation on the southeastern coast of the Isle of Wight of southern England. The type locality (Bed 38) is exposed at Yaverland while the rest (Bed L2) are exposed high in the cliff at Sudmoor Point but have yielded only NHMUK PV R36539, R36522 and R36553–36558. All specimens are dating to the Barremian stage of the Early Cretaceous.[1]