Siats

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Siats (/see-ats/) is an extinct genus of large theropod dinosaurs known from the Late Cretaceous Cedar Mountain Formation (Mussentuchit Member) of Utah, United States. The genus contains a single species, Siats meekerorum. It was initially classified as a megaraptoran, a clade of large theropods with controversial relationships. Alternative positions within the Neovenatoridae, Allosauroidea, and Tyrannosauroidea have also been proposed. Siats was described by Lindsay E. Zanno and Peter J. Makovicky in 2013. The generic name references a man-eating monster in Ute mythology. The specific name meekerorum honors the geologist John Caldwell Meeker and his family for their support of paleontological research. Siats is known from the holotype specimen, FMNH PR 2716, a partial postcranial skeleton housed at the Field Museum of Natural History, Chicago. The specimen consists of five dorsal vertebrae, eight caudal vertebrae, a chevron, a partial right ilium, ischium, fibula, tibia, and several right and left pedal phalanges. The specimen was discovered by Lindsay Zanno as a part of a 2008 Field Museum expedition with Peter Makovicky.