Figure 1

Survey of intercentrum system in selected lepidosaurs. (a) cervical vertebrae of Sphenodon; (b) caudal vertebra of Sphenodon UAMZ 405; (c) cervical vertebrae of Iguana; (d) caudal vertebra of Iguana MCZ 10975; (e) cervical vertebrae of Rachodactylus; (f) caudal vertebra of Gekko MCZ 173377; (g) cervical vertebrae of Shinisaurus; (h) caudal vertebra of Shinisaurus; (i) cervical vertebrae of Varanus; (j) caudal vertebra of Varanus USNM 287277; (k) cervical vertebrae of Anilius MCZ 19537; (l) caudal vertebrae of Anilius MCZ 19537; (m) cervical vertebrae of Uropeltis MCZ 3873; (n) caudal vertebra of Rhinophis; (o) cervical vertebrae of Xenopeltis USNM 287277; (p) caudal vertebra of Xenopeltis USNM 287277; (q) cervical vertebrae of Python FMNH 51631; (r) caudal vertebra of Python ZFMK 83431; (s) cervical vertebra of Haasiophis (based on HUJ-Pal EJ 695); (t) caudal vertebra of Haasiophis (based on HUJ-Pal EJ 695); (u) cervical vertebrae of Najash (based on MPCA-PV 391); (v) caudal vertebra of Najash (based on MPCA-PV 396); (w) cervical vertebrae of Dinilysia (based on MPCA-PV 527 and MACN-PV-N 116) and (x) caudal vertebrae of Dinilysia (based on MACN-RN-1016). Abbreviators: At, atlas; Ax, axis; C, cervical; ch, chevron bone; chy, caudal hypapophysis; hae, haemapophysis; hy: hypapophysis; i, intercentrum. For taxa without specimen number, source of data is from available literature: a, c, e, i, and n;⁷ g and h⁴⁹).