page_title: Adasaurus
section_title: Description
hierarchical_section_title: Adasaurus / Description
caption_attribution_description: English: Schematic diagram of the right pelvis in Adasaurus mongoliensis, based on the holotype IGM 100/20. Mainly based on Turner et al. 2012 and Mickey Mortimer.&#91;1&#93;&#91;2&#93; ______________________________________________________________________________________________________________ Español: Diagrama esquematico de la cadera derecha de Adasaurus mongoliensis, basado en el holotipo IGM 100/20. Mayormente basado en Turner et al. 2012 y Mickey Mortimer. ______________________________________________________________________________________________________________ Русский: Диагра́мма тазовой кости Adasaurus mongoliensis (Адазавр), oснованная на голотипе IGM 100/20. Oснованный на Turner et al. 2012 и Mickey Mortimer. References ↑ &#32;(2012).&#32;"A Review of Dromaeosaurid Systematics and Paravian Phylogeny". Bulletin of the American Museum of Natural History&#32;371&#32;(371): 19–22. DOI:10.1206/748.1. ↑ Adasaurus' skull!.&#32;The Theropod Database Blog&#32;(August 23, 2012).
context_page_description: Adasaurus is a genus of dromaeosaurid theropod dinosaur that lived in Asia during the Late Cretaceous period. It was a small, ground-dwelling bipedal carnivore with a sickle-shaped claw on the second toe of each hind foot.
context_section_description: Adasaurus was a moderate-sized dromaeosaurid. During the description of Mahakala, by using body mass equations to estimate size and length in many paravians, Adasaurus was estimated at 2.39 m (7.8 ft) long with a weight of 36.4 kg (80 lb). In 2012, Thomas R. Holtz estimated its length around 1.8 m (5.9 ft) and a weight around 9.1 to 22.7 kg (20.1 to 50.0 lb). Nevertheless, Gregory S. Paul estimated its length at 2 m (6.6 ft) and gave a weight of 15 kg (33 lb) in 2016. 
  The holotypic remains are fragmentary, consisting of a skeleton with partial skull missing its anterior region, 9 cervical vertebrae, 3 partial dorsal vertebrae, and approximately 6 sacral vertebrae, the hindlimbs, a nearly complete right pelvic girdle compromising the illium, ischium and pubis. The second specimen, also briefly described in the original paper, consists of a right hindlimb, including a complete pes and other unspecified fragmented postcrania. The femur of the holotype IGM 100/20 measures 27.3 cm (273 mm) and the fourth trochanter is developed in a ridge-like structure with a rugose texture. The femur itself is very similar to that of the indeterminate dromaeosaur DGBU-78, known from the Gugyedong Formation.
  In the original description, the only autapomorphy given to Adasaurus was the reduced second pedal ungual. The authenticity of the reduced II pedal ungual has been disputed though, Senter 2010 claimed that the supposed ungual did not pertain to the specimen. However, in the revised diagnosis conducted by Turner et al. 2012, Adasaurus can be recognised by the following traits: maxillary process of the jugal dorsoventrally expanded; the descending process of the lacrimal is strongly curved anteriorly; mandible with large surangular foramen; quadrate shaft with dorsally irregular triangular process along lateral border; only the anterior sacral vertebrae have pleurocoels; second pedal ungual reduced; the anterior margin of the preacetabular blade of ilium is short.
caption: Diagram of the right pelvis on IGM 100/20
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