Notarium
Notarium or os dorsale is a bone consisting of the fused
pterosaurs the notarium articulates with the scapula. This joint is unique among tetrapods, as in no other taxa is there a direct connection between the pectoral girdle and vertebral column (though in species with clavicles
, the clavicle articulates with the sternum, which in turn is connected to the vertebrae via the ribs, allowing an indirect connection).
Among birds, notarium is found among
Steatornithidae. It contains 2-6 vertebrae. It probably evolved at least 10 times independently in birds.[1]
References
- doi:10.3312/jyio1952.14.86. Archived from the originalon 2018-11-03.
External links
- Glossary: N // palaeos.com
- Hogg D. A. (1982). "Fusions occurring in the postcranial skeleton of the domestic fowl". Journal of Anatomy. 135 (Pt 3): 501–12. PMID 7153169.
- "A pelvis at the front – the notarium". Dave Hone's Archosaur Musings.