Haemal arch
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A haemal arch, also known as a chevron, is a bony arch on the ventral side of a tail vertebra of a vertebrate. The canal formed by the space between the arch and the vertebral body is the haemal canal
Haemal arch series of Oksoko and Rinchenia.
Oksoko avarsan
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Oksoko is a genus of oviraptorid dinosaur from the Late Cretaceous of Asia, that lived in what is now the Nemegt Formation in Mongolia. It includes the type species Oksoko avarsan.
Haemal arch
…Haemal arches of Wintonotitan. Caudal vertebrae of Ichthyovenator, showing haemal arches below tail. Haemal arch of Edmontosaurus. Haemal arch series of Oksoko and Rinchenia. Caudal vertebrae of Ischioceratops, showing haemal arches below tail. References S. N. Prasad; Vasantika Kashyap (1 January 1989). A…
Oksoko holotype block
Holotype block assemblage prior to fossil preparation
Skull of holotype MPC-D 102/110a
Forelimb bones of Oksoko, showing the two-fingered hand in (d)