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Segnosaurus
''Segnosaurus'' ('slow lizard') is a genus of herbivorous theropod dinosaur belonging to the Therizinosauridae from the Cretaceous of Mongolia.
==Discovery and naming==
In 1973, a Soviet-Mongolian expedition near Amtgay uncovered the fossil of a theropod. In 1974 and 1975 more such remains were discovered, at the same site but also near Khara-Khutul. The type species, ''Segnosaurus galbinensis'', was named and described in 1979 by Dr. Altangerel Perle. The generic name is derived from Latin ''segnis'' meaning 'slow' or 'sluggish' and Greek ''sauros'' meaning 'lizard', in reference to the stocky build of the hindlimbs. The specific name refers to the Galbin region.〔A. Perle, 1979, "Segnosauridae - novoe semeistvo teropod is posdnego mela Mongolii", ''Trudy - Sovmestnaya Sovetsko-Mongol'skaya Paleontologicheskaya Ekspeditsiya'' 8: 45-55〕
Four specimens were recovered from the Bayan Shireh Formation of the Mongolian People's Republic, in sediments dated between the Cenomanian to Turonian stages (Late Cretaceous Period, about 93 million years old). These include the holotype, IGM 100/80, a partial skeleton consisting of a mandible, pelvis, right thighbone, scapulocoracoid, incomplete forelimb and sacral and caudal vertebrae; and the paratypes IGM 100/82 and IGM 100/83, both more fragmentary skeletons also lacking the skulls.〔 Later specimen IGM 100/81 was referred, a foot.
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