[D] Marshosaurus bicentesimus [Su] [sG] [T]
Jurassic Late Kimmeridgian Tithonian
Saurischia Theropoda Incertae Sedis \\\\\\\"Carnosaurs\\\\\\\"
Morrison Formation, (Cleveland-Lloyd Dinosaur Quarry) Utah, US
Genus - Typespecies - Skull
Partial skull and postcranial skeleton.
Known from the single species M.bicentesimus. The type specimen is an isolated ilium and other elements -ilia, pubes, ischia, a premaxilla, and dentaries - are referred. The ilium has distinctive shallow excavations in the articular face of the pubic peduncle.
The taxonomic position of M.bicentesimus is unclear. The ilium appears to have a narrow brevis shelf (Galton and Jensen, 1979) as in carnosaurus, while the pubic shaft is bowed cranially as in ceratosaurs (Rowe and Gauthier) That this pubis does pertain to this species is confirmed by the match of the convexities of its iliac articular face to the concavities of the pubic articular face of the ilium (Madsen, 1976) Furthermore, the pubis otherwise resembles that of Coelurus agilis (Madsen, 1976)