title: [Craniogenesis in the laughing gull (Larus ridibundus L.). The reconstruction of the basic plan of the bird].
abstract: To contribute to the knowledge of the cranium of older bird embryos, the chondrocranium and osteocranium of the Black-headed Gull (Larus ridibundus) are described. The chondrocranium of the Black-headed Gull is compared with the chondrocranium of other bird species with special consideration of functional and phylogenetic aspects. As a result a "grundplan" of the bird chondrocranium is reconstructed. Most of the chondrocranial autapomorphies of birds are connected with the enlargement of the eyes, the development of a beak and a prokinetic skull, and the reduction of the olfactory system.
authors.affiliation: Zoologisches Institut Universität Tübingen, Lehrstuhl für Spezielle Zoologie.
authors.forename: E
authors.initials: E
authors.lastname: Weber
mesh_terms: D000818:Animals; D001502:Beak / Q000196:embryology; D001717:Birds / Q000196:embryology*; D009915:Orbit / Q000196:embryology; D010802:Phylogeny; D012886:Skull / Q000196:embryology*
vernacular_title: Zur Kraniogenese bei der Lachmöwe (Larus Ridibundus L.) Zugleich ein Beitrag zur Rekonstruktion des Grundplans der Vögel.