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 node name
Epiprocta     Look for this name in NCBI   Wikipedia   Animal Diversity Web
  recommended citations Kohli et al., 2016
  node minimum age
199.3 Ma
The attribution to the Rhaeto-Liassic is established by the stratigraphic position of the Bayreuth Formation between well-dated Keuper sediments and the Gryphaeensandstein Formation (Bloos et al., 2005), and by plant index fossils (Weber, 1968).
  node maximum age
None specified
 primary fossil used to date this node 
TUClP In-192
Liassophlebia sp., Tillyard 1925
Location relative to the calibrated node: Crown

[show fossil details]
     Locality: Pechgraben (district Kulmbach) near Bayreuth, Northern Bavaria
     Stratum: ("Pflanzensandstein"), Bayreuth Formation
     Geological age: Triassic, Mesozoic

More information in Fossilworks   PaleoBioDB

  phylogenetic justification
The wing venation of this fossil is nearly identical to other fossils of the genus Liassophlebia and shares the following synapomorphies with Heterophlebioptera and Heterophlebioidea (Nel et al., 1993; Bechly, 1996): unique unicellular anal loop, which lies beneath the subdiscoidal cell and is ventrally closed by CuAb that is parallel to AA and thus directed towards the wing base instead of the posterior wing margin; subdiscoidal cell of the hind wing with a convex curved or angulated posterior margin; antenodal crossveins between costal margin and ScP suppressed distal of ax2; IR2 arising on RP3/4. The attribution to the stem group of Anisoptera is well established by the unique synapomorphy of the shape of the hind wing discoidal cell, which foreshadows the anisopterid division into hypertriangle and triangle (only sometimes lacking the dividing crossvein).
  phylogenetic reference(s)
Kohli, M.K., Ware, J.L., and Bechly, G. 2016. How to date a dragonfly: Fossil calibrations for odonates. Palaeontologia Electronica, 19.1.1FC.
[View electronic resource]
 tree image (click image for full size) 
tree image
Figure 3 from Kohli et al. (2016).