title: Comparative anatomy: all vertebrates do have vertebrae.
abstract: In contrast to lampreys and jawed vertebrates, hagfishes were thought to lack vertebrae. Now, long overlooked vertebral rudiments have been analysed in hagfish, suggesting that vertebrae existed in the last common ancestor of all vertebrates.
authors.affiliation: Muséum National d'Histoire Naturelle, UMR 7207, CP38, 8, rue Buffon 75231, Paris Cedex 05, France. janvier@mnhn.fr
authors.forename: Philippe
authors.initials: P
authors.lastname: Janvier
mesh_terms: D000818:Animals; D005075:Biological Evolution; D002356:Cartilage / Q000033:anatomy & histology / Q000196:embryology; D005399:Fishes / Q000033:anatomy & histology* / Q000196:embryology; D005580:Fossils; D006196:Hagfishes / Q000033:anatomy & histology* / Q000196:embryology; D007798:Lampreys / Q000033:anatomy & histology / Q000196:embryology; D019170:Somites / Q000033:anatomy & histology / Q000196:embryology; D013131:Spine / Q000033:anatomy & histology* / Q000196:embryology