Kayentavenator

Период: Юра


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Хищный динозавр раннего юрского периода, около полуметра высотой. Кайентавенатор (лат. Kayentavenator) — род ящеротазовых динозавров из семейства тетануры, группы тероподов, живших в раннем юрском периоде, на территории нынешней Северной Америки. Окаменелости теропода были найдены в штате Аризона, США. Впервые описан палеонтологом Robert Gay в 2010 году. Представлен одним видом — Kayentavenator elysiae.[1][2]
Kayentavenator (meaning "Kayenta hunter") is a small carnivorous dinosaur genus which lived during the Early Jurassic Period; fossils were recovered from the Kayenta Formation of northeastern Arizona and were described in 2010.[1]

Description[edit]
The holotype specimen of K. elysiae is a juvenile, as shown by unfused neural spines[1] and would have stood about 0.5 metres (1.6 ft) high at the hip. The adult size of Kayentavenator is unknown. The inclusion of a pubic fenestra is one of the characteristics that Gay uses to set Kayentavenator apart from the contemporaneous, and better known Dilophosaurus.[1] As Dilophosaurus lacks a pubic fenestra as a subadult or an adult,[2] it is unlikely that it had one during any stage of ontogeny. Apomorphies include an ellipsoid acetabulum, the greater trochanter and the head of the femur having been fused, a mediodistal crest that extends 50% of the length of the femur, as well as a prominent accessory condyle on the medial femoral condyle, a groove in dorsal surface of the femoral head that extends out from the centerline of the body, and highly constricted ("waisted") caudal vertebra centra.[1]

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