comment on this calibration


 node name
Gomphidae     Look for this name in NCBI   Wikipedia   Animal Diversity Web
  recommended citations Kohli et al., 2016
  node minimum age
150 Ma
The Malm zeta 2b, Hybonotum zone of the Found in Solnhofen limestones has a minimum age of 150 Ma (Schweigert, 2007).
  node maximum age
None specified
 primary fossil used to date this node 
SMNS 6D (D. Kümpel c
Proterogomphus renateae , Bechly, et al. (1998)
Location relative to the calibrated node: Crown

[show fossil details]
     Locality: Solnhofen
     Geological age: Jurassic, Mesozoic

More information in Fossilworks   PaleoBioDB

  phylogenetic justification
Bechly et al. (1998), Bechly (1998), and Vernoux et al. (2010) established the phylogenetic position of Proterogomphidae within the crown group of Recent Gomphidae, as closest relatives of the subfamily Hageniinae. This position is supported by several synapomorphies, like hind wing triangles with angulate distal side and trigonal planate (posttrigonal sector), hind wings with less than 5 antefurcal crossveins, and branching of RP at midfork symmetrical.
  phylogenetic reference(s)
Bechly, G., Nel, A., Martinez-Delclos, X., and Fleck, G. 1998. Four new dragonflies from the Upper Jurassic of Germany and the Lower Cretaceous of Mongolia (Anisoptera: Hemeroscopidae, Sonidae, and Proterogomphidae fam. nov.). Odonatologica, 27:149-187.
Bechly, G. 1998. New fossil dragonflies from the Lower Cretaceous Crato Formation of north-east Brazil (Insecta: Odonata). Stuttgarter Beiträge zur Naturkunde, Series B , 264:1-66.
Vernoux, J., Huang, D., Jarzembowski, E.A., and Nel, A. 2010. The Proterogomphidae: a worldwide Mesozoic family of gomphid dragonflies (Odonata: Anisoptera: Gomphides). Cretaceous Research, 31:94-100.
 tree image (click image for full size) 
tree image
Figure 3 from Kohli et al. (2016).