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Charininae Look for this name in NCBI Wikipedia Animal Diversity Web
http://palaeo-electronica.org/content/fc-6 Head, 2015
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The minimum age is derived from radiometric dating of the Eagle Crag Ash, which overlies the top of the Harrison Formation, to 19.2 ± 0.5 Ma (MacFadden and Hunt, 1998; Tedford et al., 2004). Tedford et al. (2004, figure 6.2) indicate the top of the Harrison Formation may be as old as 20 Ma.
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|primary fossil used to date this node|
UNSM 125562 is referred to the total clade of Charina (all fossil taxa more closely related to extant Charina than extant Lichanura) on the basis of the following caudal vertebral characters: 1) caudal tailclub composed of more than six vertebrae; 2) laterally expanded, lobate distal neural spine; 3) Anteriorly directed pterapophyses (=“postzygapophyseal wing” of Szyndlar, 1994) present (Kluge, 1993; Szyndlar, 1994; Parham et al., 2012).
Kluge, A.G. 1993. Aspidites and the phylogeny of pythonine snakes. Records of the Australian Museum Supplement , 19:1-77.
Szyndlar, Z. 1994. Oligocene snakes of southern Germany. Journal of Vertebrate Paleontology, 14:24-37.
Parham, J.F., Donoghue, P.C.J., Bell, C.J., Calway, T.D., Head, J.J., Holroyd, P.A., Inoue, J.G., Irmis, R.B., Joyce, W.G., Ksepka, D.T., Patańe, J.S.L.N., Smith, D., Tarver, J.E., van Tuinen, M., Yang, Z., Angielczyk, K.D., Greenwood, J., Hipsley, C.A., Jacobs, L.L., Makovicky, P.J., Müller, J., Smith, K.T., Theodor, J.M., Warnock, R.C.M., and Benton, M.J. 2012. Best practices for applying paleontological data to molecular divergence dating analyses. Systematic Biology, 61:346-359.
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