A new specimen ofIchthyosaurus conybeari(Reptilia, Ichthyosauria) from Watchet, Somerset, England, U.K., and a re-examination of the species

—Ichthyosaurus conybeari is a rare species, previously known only from an incomplete holotype and one referred specimen, both from the Lyme Regis area of the west Dorset coast, U. K. A newly recognized, nearly complete specimen (NMW 93.5G.2) is the first occurrence of the species in Somerset, U. K. A revised diagnosis recognizes new morphological characters that distinguish the species: slender maxilla with a long, delicate premaxillary process; narrow postorbital; humerus with an anteriorly offset dorsal process that has a well-defined lip extending slightly into the shaft; fibula that is much larger dorsoventrally and mediodistally than tibia; and wide rectangular ischium that is much shorter than the pubis and femur. Notching of anterior fin elements in the forefin had been used as a diagnostic character, but a review of notching within Ichthyosaurus suggests that it has little taxonomic utility. Another specimen (NHMUK R15907), herein referred to the species, extends the range of I. conybeari ...