comment on this calibration

Cariblattoides + Cariblatta

 node name
Cariblattoides + Cariblatta     Look for this name in NCBI   Wikipedia   Animal Diversity Web
  recommended citations Evangelista et al. 2017
  node minimum age
48.14 Ma
The holotype is given the locality “Denson site”, an outcrop of the Parachute Creek Member of the Green River Formation that is located in the Piceance Creek Basin of Colorado (Wappler et al., 2015). This upper and lower age bound for this layer are 51.24 (+/- 0.52) Ma and 48.37 (+/- 0.23) Ma respectively. The lower age limit is based on single crystal laser incremental 40Ar/39Ar dating of volcanic phenocrysts (Smith et al., 2008).
  node maximum age
0 Ma
None specified.
 primary fossil used to date this node 
USNM 542284
Cariblattoides labandeirai, Vršanský et al. 2012
Location relative to the calibrated node: Crown

[show fossil details]
     Locality: Denson site
     Stratum: Parachute Creek Member of the Green River Formatio
     Geological age: Eocene, Paleogene, Cenozoic

More information in Fossilworks   PaleoBioDB

  phylogenetic justification
The authors of this species justify its taxonomic placement with 13 characters of the hindwing, forewing, coloration, palps, and body shape (Vršanský et al., 2012). Specifically, important synapomorphies linking C. labandeirai, with other Cariblattoides are: terminal palpomeres short and cup-like, tegmina highly elongated, branched cubital vein (Cu; a.k.a. CuA) in tegmina and hindwing radial veins (R or RS) mostly simple. Vršanský et al. (2011)’s phylogeny places C. labandeirai as sister to the extant Cariblattoides piraiensis, which is endemic to Brazil.
  phylogenetic reference(s)
Vršanský, P., Vidlička, L.u., Čiampor, Jr., F., and Marsh, F. 2012. Derived, still living cockroach genus Cariblattoides (Blattida: Blattellidae) from the Eocene sediments of Green River in Colorado, USA. Insect Science, 19:143-152.
 tree image (click image for full size) 
tree image
Figure 2 from Evangelista et al. (2017).