astragalar การใช้

The fibula articulates with the calcaneum, while the astragalar-cuboid articulation is reduced or absent.
The tibia provides two indications : its gracile form and the tall height and narrow width of the astragalar process.
Most tetanurans possess specialized wrist bones, the absence or reduction of the fourth digit of the hand, a strap-like scapula, stiffened tails, and a laminar astragalar ascending process.
In 2005 another study, by Oliver Rauhut, suggested that it was indeed a theropod, and more specifically, a member of the Abelisauroidea based on the presence of the distinct vertical median ridge on the astragalar groove.
Other unusual characters include a spinopostzygapophyseal laminae in middle posterior dorsal vertebrae bifurcate into medial and lateral branches, an astragalar ascending process that does not extend to the posterior margin of the astragalus and the presence of a calcaneum.