AORTIC ARCHES OF BIRDS — GLENN Y 561 



Family Phoenicopteridae 



Carotids B-2-s; ligamentum botalli present; vertebrals arise from 

 the common carotids posterior to the origin of the superficial cervicals. 



Species studied 



By Garrod 



Phoenicopterus anliquorum Temminck 



(B-2-s) 

 Phoenicopterus ruber Linn6 (B-2-s) 



By Glenny 

 Phoenicopterus ruber Linn6 (B-2-s) 



ORDER ANSERIFORMES 



Typically bicarotid (A-1); ligamentum aortae present; ligamentum 

 botalli rarely reduced or absent; types A and E coracoid arteries; 

 type 1 thoracic artery; vertebrals and superficial cervicals highly 

 variable in points of origin, with considerable variation within a 

 species — not a stable pattern in the Anatidae, and evolution of the 

 cervical arteries appears to be undergoing considerable and wide 

 deviation; a complex oesophageal supply is usually encountered. 



Occurrence of a patent ductus caroticus in Anas spinicauda was 

 reported by Finn (1891). 



There are no apparent significant or characteristic differences in the 

 basic arterial patterns of the Anhimidae and Anatidae, aside from the 

 several minor differences which are found to occur within the Anatidae. 



In the Anliimidae, the vertebrals appear to arise independently from 

 the common carotid, while the vertebrals and superficial cervicals, 

 in the Anatidae, generally have a short, common root arising from the 

 common carotid artery. 



References: Bauer, 1825; Finn, 1891; Garrod, 1873; Glenny, 1944d; 

 Hahn, 1830; Rabl, 1906a. 



Family Anhimidae 

 Carotids A-1 ; ligamentum botalli prominent. 



Species studied 

 By Glenny 



Chauna torquata (Oken) 



Family Anatidae 



Carotids A-1; ligamentum botalli usually present; superficial 

 cervical arteries variable in number and points of origin. 



