Lineage (NCBI): This node has no ancestors.
Pantherophis+Pituophis Look for this name in NCBI Wikipedia Animal Diversity Web
http://palaeo-electronica.org/content/fc-9 Head et al. 2016
node minimum age |
USNM 125457 was encased in a local ash deposit that is geochemically matched with the Ibex Hollow Tuff, radiometrically dated to 11.93 Ma (Tucker et al., 2014).
node maximum age |
|primary fossil used to date this node|
Assignment to Pantherophis is based on a premaxilla with thin, dorsomedially angled maxillary processes, a blunt, rounded anterior margin, and laterally expanded ascending processes forming a keyhole shape in anterior view.
Head, J.J., K. Mahlow, and J. Müller. 2016. Fossil calibration dates for molecular phylogenetic analysis of snakes 2: Caenophidia, Colubroidea, Elapoidea, Colubridae. Palaeontologia Electronica, 19.2.2FC
[View electronic resource]
|tree image (click image for full size)|