title: The embryonic development of ear-tufts and associated structural head and neck abnormalities of the Araucana fowl.
abstract: Developing embryonic structural abnormalities of ear-tufted embryos of the Araucana fowl are described. These abnormal structures are peduncle, cleft, ear opening, tympanic membrane, and columella auris. The structural abnormalities are believed to be due to the early incomplete fusion of the hyoid and mandibular arches from the distal part of the ear opening to the neck area.
mesh_terms: D000818:Animals; D002642:Chick Embryo / Q000254:growth & development*; D002645:Chickens / Q000235:genetics*; D004423:Ear / Q000196:embryology; D005799:Genes, Dominant; D006257:Head / Q000002:abnormalities*; D006720:Homozygote; D009333:Neck / Q000002:abnormalities*; D011201:Poultry Diseases / Q000235:genetics*