comment on this calibration


 node name
Zygoptera     Look for this name in NCBI   Wikipedia   Animal Diversity Web
  recommended citations Kohli et al., 2016
  node minimum age
132.9 Ma
Date based on the minimum age of the Doronino Formation (Sinitza, 1995; Sukatsheva and Vassilenko, 2013). The provided absolute age for Tithonian-Valanginian is based on the most recent International Chronostratigraphic Chart v2013/01 (Cohen et al., 2013).
  node maximum age
None specified
 primary fossil used to date this node 
PIN 4626/462
Mersituria ludmilae, Vasilenko, 2005
Location relative to the calibrated node: Crown

[show fossil details]
     Locality: Chernovskie Kopi, left bank of Ingoda River, 18 km southwest of Chita city, Chita Region, Chita Dist
     Stratum: Doronino Formatio
     Geological age: Jurassic, Mesozoic

More information in Fossilworks   PaleoBioDB

  phylogenetic justification
Several wing characters support the attribution of this fossil to Hemiphlebiidae, close to the Cretaceous genus Parahemiphlebia, such as tiny size with few cells in the wing venation, basally open discoidal cell in forewings, non-aligned postnodal and postsubnodal crossveins, and the kink of RP1 at the stigmal brace vein.
  phylogenetic reference(s)
Vasilenko, D. 2005. New Damselflies (Odonata: Synlestidae, Hemiphlebiidae) from the Mesozoic Transbaikalian Locality of Chernovskie Kopi. Paleontological Journal, 39:280-283.
 tree image (click image for full size) 
tree image
Figure 3 from Kohli et al. (2016).