The bones on which this species is founded are a pair of ulnae, one radius, four metatarsi, and one coracoid. |
They had been crafted from the ulnae of the red-crowned crane and had between five and eight finger-holes. |
This process progresses to the development of caput ulnae syndrome in which the carpus subluxates volarly and supinates while the ulnar head displaces dorsally. |