comment on this calibration


 node name
Burhinidae     Look for this name in NCBI   Wikipedia   Animal Diversity Web
  recommended citations Smith, 2015
  node minimum age
23.03 Ma
The Codret Quarry (Coderet-Bransat), from which the holotype of Genucrassum bransatensis was collected, is the reference locality for the Paleogene mammalian zone MP30. Zone MP30 is considered to bracket the Miocene-Oligocene boundary with an age estimated between 24.1-23.6 Ma (Hugueney et al., 2003). The age of the boundary between the Oligocene and Miocene has been revised to 23.03 Ma (International Commission on Stratigraphy, 2012.) and is recommended herein as a constraint on the divergence between Burhinidae and other Charadrii.
  node maximum age
0 Ma
none specified.
 primary fossil used to date this node 
NHB Cod. 1258
Genucrassum bransatensis, Di Pietri and Scofield 2013
Location relative to the calibrated node: Stem

[show fossil details]
     Locality: Codret Quarry (Coderet-Bransat)
     Geological age: Cambrian, Paleozoic

  phylogenetic justification
NMB Cod. 1258 was referred to Burhinidae by De Pietri and Scofield (2013) based on apomorphies of the carpometacarpus. The following apomorphies that support referral of NMB Cod. 1258 were cited by De Pietri and Scofield (2013): (1) strongly developed and ventrally projecting processus extensorius; (2) caudally well-developed ventral portion of trochlea carpalis, displaying a sharp angle distally. No alternative hypothesis has been proposed linking this specimen to any clade other than Burhinidae.
  phylogenetic reference(s)
De Pietri, V.L., and Scofield, R.P. 2013. The earliest record of a stone-curlew (Charadriiformes, Burhinidae) from the late Oligocene of France. Journal of Ornithology, 155: 421-426
 tree image (click image for full size) 
tree image
Figure 1 from Smith (2015).