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Sigilmassasaurus
''Sigilmassasaurus'' (pron.:""; "Sijilmassa lizard") is an extinct genus of tetanuran theropod dinosaur that lived approximately 100 to 94 million years ago during the middle of the Cretaceous Period in what is now northern Africa. ''Sigilmassasaurus'' was a moderately-built, ground-dwelling, bipedal carnivore, like most other theropods.
==Discovery==
Fossils of this dinosaur were recovered at the Kem Kem Formation in the Tafilalt Oasis region of Morocco, near the site of the ancient city of Sijilmassa, for which it was named. Canadian paleontologist Dale Russell named ''Sigilmassasaurus'' in 1996, from the ancient city and the Greek word ''sauros'' ("lizard"). A single species was named, ''S. brevicollis'', which is derived from the Latin ''brevis'' ("short") and ''collum'' ("neck"), because the neck vertebrae are very short from front to back.
''Sigilmassasaurus'' comes from red sandstone sediments in southern Morocco, which are known by various names, including the ''Grès rouges infracénomaniens'', Continental Red Beds, and lower Kem Kem Beds. These rocks date back to the Cenomanian, the earliest stage of the Late Cretaceous Period, approximately 100 to 94 million years ago.〔Sereno PC, Dutheil DB, Iarochene M, Larsson HCE, Lyon GH, Magwene PM, Sidor CA, Varricchio DJ, Wilson JA. 1996. Predatory dinosaurs from the Sahara and Late Cretaceous faunal differentiation. Science 272: 986-991 CrossRef, Medline, ISI.〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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