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Kryptops

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Kryptops
Temporal range: Late Cretaceous
Jifkk7A.jpg
An artist's illustration of Kryptops palaios
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Order: Saurischia
Suborder: Theropoda
Family: Abelisauridae
Genus: Kryptops
Sereno & Brusatte, 2008
Species: K. palaios
Binomial name
Kryptops palaios
Sereno & Brusatte, 2008
Kryptops (meaning "covered face", in reference to evidence that the face bore a tightly-adhering covering) is a genus of theropod dinosaur from the Early Cretaceous of Niger. It is known from a partial skeleton found at the Gadoufaoua locality in the western Ténéré Desert, in rocks of the Aptian-Albian age Elrhaz Formation. This dinosaur was described by Paul Sereno and Stephen Brusatte in 2008, with a single species to date: the type species K. palaios ("old").[1]

DiscoveryEdit

The holotype skeleton, MNN GAD1, includes a maxilla (main tooth-bearing bone of the upper jaw), vertebrae, ribs, and articulated pelvic girdle and sacrum, belonging to an adult about 6–7 m (19.7–23.0 ft).[1] According to the describers, this specimen represents one of the earliest known abelisaurids, and is notable for the heavily textured surface of the maxilla; the presence of pits and impressions of blood vessels indicates that there was a covering firmly attached to the face, perhaps of keratin. Sereno and Brusatte performed a cladistic analysis that found Kryptops to be the most basal abelisaurid. This was based on several features, including a maxilla textured externally by impressed vascular grooves and a narrow antorbital fossa, that clearly place Kryptops palaios within Abelisauridae as its oldest known member.[1] Carrano et al., on the other hand, consider Kryptops palaios to be a chimera, and state that its postcranial remains (especially a pelvis and sacrum), found some 15 metres from the holotypic maxilla, actually belong to a carcharodontosaurid (possibly to Eocarcharia dinops).[2]

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