comment on this calibration

Humanity

Lineage (NCBI): This node has no ancestors.
 node name
Humanity     Look for this name in NCBI   Wikipedia   Animal Diversity Web
 
  recommended citations
http://palaeo-electronica.org/content/fc-1 Benton et al. 2015
 
  node minimum age
0.2 Ma
The oldest Neanderthal fossils are just under 0.2 Ma from Biache St. Vaast (France) and Ehringsdorf (Germany; Klein, 1999). As these dates postdate our marine timescale (Gradstein et al., 2012), we use the radiometric and faunal dates provided in the primary literature instead.
 
  node maximum age
1 Ma
For the soft maximum split within H. sapiens, we would suggest the widespread occurrences of H. erectus outside Africa over 1 Ma (Klein, 1999). In the case of central Asia, there appears to have been populations of H. erectus nearly 1.8 Ma (Lordkipanidze et al., 2007). Despite occurrences of the genus Homo throughout Asia and Africa by around 1 Ma, no evidence for Neanderthals or anatomically modern humans from this time is yet known (Klein, 1999).
 
 primary fossil used to date this node 
 
BSV 1
Homo sapiens neanderthalensis, foo
Location relative to the calibrated node: Crown

[show fossil details]
     Locality: Biache Saint Vaast
     Geological age: Cambrian, Paleozoic
 
 

 
  phylogenetic justification
The Biache Saint cranial vaults are widely accepted as definitively examples of Homo neanderthalensis, and so by definition part of the neanderthalensis-sapiens clade (Klein, 1999). Anatomical apomorphies shared with the early and classic Neanderthals are: the pattern and development of the frontal sinus; the development of the supraorbital torus; a postero-superior depression of the parietal bone corresponding to a prelambdatic depression; the alignment of the zygomatic process with the external auditory meatus; a coronally orientated tympanic plate; non alignment of the digastric groove with the base of the styloid process and the stylomastoid foramen; the pattern and dimensions of the semicircular canals (Guipert et al. 2011).
 
  phylogenetic reference(s)
Klein, R.G. 1999. The Human Career: Human Biological and Cultural Origins, 2nd ed. University of Chicago Press, Chicago.
Guipert, G., Lumley, M.-S. de, Tuffreau, A., and Mafart, B. 2011. A late Middle Pleistocene hominid: Biache-Saint-Vaast2, North France. Comptes Rendus Palevol, 10:21-33.
 
 tree image (click image for full size) 
tree image
FIgure 11 of Benton et al. (2014).
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