A new large-bodied theropod dinosaur from the Middle Jurassic of Warwickshire, United Kingdom

作者：Benson Roger B J^*; Radley Jonathan D

来源：Acta Palaeontologica Polonica, 2010, 55(1): 35-42.

DOI：10.4202/app.2009.0083

• Dinosauria
• Theropoda
• Tetanurae
• Megalosaurus
• Cruxicheiros
• Bathonian
• Chipping Norton Limestone Formation
• England

Previously undocumented postcranial material from the Chipping Norton Limestone Formation (Middle Jurassic: Lower Bathonian) of Cross Hands Quarry, near Little Compton, Warwickshire represents a new large-bodied theropod dinosaur, distinct from the contemporaneous Megalosaurus bucklandii. Cruxicheiros newmanorum gen. et sp. nov. is diagnosed by a single autapomorphy, the presence of a proximomedially inclined ridge within the groove that marks the lateral extent of the posterior flange of the femoral caput (trochanteric fossa). C. newmanorum shows three tetanuran features: widely separated cervical zygapophyses, a swollen ridge on the lateral surface of the iliac blade and an anterior spur of the caudal neural spines. However, due to fragmentary preservation its affinities within Tetanurae remain uncertain: phylogenetic analysis places it as the most basal tetanuran, the most basal megalosauroid (= spinosauroid) or the most basal neotetanuran.

• 出版日期2010-3