title: PALEONTOLOGY. Four legs too many?
authors.affiliation: Department of Cell and Developmental Biology, University College London, London, UK. s.e.evans@ucl.ac.uk.
authors.forename: Susan
authors.initials: S
authors.lastname: Evans
mesh_terms: D000818:Animals; D005075:Biological Evolution; D005121:Extremities / Q000033:anatomy & histology*; D008116:Lizards / Q000033:anatomy & histology*; D012911:Snakes / Q000033:anatomy & histology* / Q000145:classification*