comment on this calibration


 node name
Odonata     Look for this name in NCBI   Wikipedia   Animal Diversity Web
  recommended citations Kohli et al., 2016
  node minimum age
237 Ma
The type location of this fossil is Dzhayloucho, near Madygen, south of Fergana Valley, Kyrgyzstan. Found in Upper Triassic, Ladinian-Carnian of the Madygen Formation. The attribution of this fossil to Ladinian (242-237 Ma) rather than Carnian (237-227 Ma) by Shcherbakov (2008) is based on the megaflora (Shcherbakov, 2008), which is significantly different and more primitive than that of other Carnian localities (e.g., Ipswich Insect Beds in Australia or Molteno Formation in South Africa).
  node maximum age
None specified
 primary fossil used to date this node 
PIN 2240/1783
Triassolestodes asiaticus, Pritykina, 1981
Location relative to the calibrated node: Crown

[show fossil details]
     Locality: Dzhayloucho
     Geological age: Triassic, Mesozoic

More information in Fossilworks   PaleoBioDB

  phylogenetic justification
Triassolestodes was attributed by Nel et al. (1993) to the paraphyletic grade "Anisozygoptera", but subsequently shown to belong to Triassolestidae (Epiprocta: Isophlebioptera) by Bechly (1997) and Nel et al. (2002). The latter authors redescribed the holotype, listed synapomorphies (like AA and CuP and MP and CuA are partly fused basal of the arculus in the hind wing) in support of the attribution, and also provided a parsimony-based analysis, which confirmed Triassolestodes fell within the Isophlebioptera-Triassolestidae clade.
  phylogenetic reference(s)
Nel, A., Arillo, A., Martínez− Delclòs, X., Paicheler, J.C., and Henrotay, M. 1993. Les “Anisozygoptera” fossiles. Phylogénie et classification (Odonata). Martinia, Special Edition, 3:1-311. (In French)
Bechly, G. 1997. New fossil Odonata from the Upper Triassic of Italy, with a redescription of Italophlebia gervasutti, and a reclassification of Triassic dragonflies. Rivista del Museo Civico di Scienze Naturale E. Caffi, 19:31-70.
Nel, A., Marie, V., and Schmeißnerb, S. 2002. Revision of the lower Mesozoic dragonfly family Triassolestidae Tillyard, 1918 (Odonata: Epiproctophora). Annales de Paléontologie, 88:189-215.
 tree image (click image for full size) 
tree image
Figure 3 from Kohli et al. (2016).