comment on this calibration


 node name
Neuroptera     Look for this name in NCBI   Wikipedia   Animal Diversity Web
  recommended citations
Wolfe et al. 2016
  node minimum age
0 Ma
The fossil was recovered from the former clay pit of Schwinz, near Dobbertin, Mecklenburg, northeast Germany (Ansorge and Schlüter, 1990). Multiple associated ammonites (Eleganticeras elegantulum, Lobolytoceras siemensi, Harpoceras capellatum) indicate that the locality is correlated to the lower part of the H. falciferum ammonite Zone, early Toarcian (Ansorge and Schlüter, 1990; O'Reilly et al., 2015; Pálfy et al., 2000, 2002). The Boreal falciferum Zone is equivalent to the Tethyan Harpoceras serpentinum ammonoid Zone (Macchioni, 2002), and succeeded by the Hildoceras bifrons ammonoid Zone. The base of the bifrons Zone has been dated to 180.36 Ma ± 0.7 Myr (Ogg et al., 2012b). From this, an upper boundary of the falciferum Zone can be derived, and thus a minimum age for Dobbertin, at 179.66 Ma.
  node maximum age
411 Ma
A soft maximum age is estimated from R. praecursor, the oldest hexapod, from the Early Devonian (Pragian) Rhynie Chert of Aberdeenshire, Scotland. Spore assemblages of the Windyfield and stratigraphically underlying Rhynie Chert are dated to the early but not earliest Pragian to early (earliest?) Emsian (polygonalis-emsiensis Spore Assemblage Biozone) (Parry et al., 2011). Radiometric dating of the underlying Milton of Noth Andesite at ca. 411 Ma (Parry et al., 2011, 2013) has been subject to a dispute over its temporal relationship to hot spring activity associated with the cherts (Mark et al., 2011, 2013) and predates the biostratigraphic dating of the Rhynie Chert relative to the global dating of the base of the Pragian Stage. Therefore, a soft maximum constraint may be defined at 411 Ma for the Rhynie Chert.
 primary fossil used to date this node 
MBA I 5046
Liassochrysa stigmatica, Ansorge and Schlüte, 1990
Location relative to the calibrated node: Crown

[show fossil details]
     Locality: Schwinz clay pit near Dobbertin, Mecklenburg
     Geological age: Jurassic, Mesozoic

  phylogenetic justification
L. stigmatica was coded in the morphological matrix for the total evidence phylogeny of Liu et al. (2015). In that tree, it was a member of crown group Mantispidae, a family within Hemerobiiformia, and therefore crown Neuroptera (Liu et al., 2015). This fossil was also the oldest calibration used for Neuroptera in the divergence time analysis of Winterton et al. (2010).
  phylogenetic reference(s)
Liu, X.,Winterton, S.L.,Wu, C., Piper, R., and Ohl, M. 2015. A new genus of mantidflies discovered in the Oriental region, with a higher-level phylogeny of Mantispidae (Neuroptera) using DNA sequences and morphology: New genus and higher phylogeny of Mantispidae. Syst. Entomol. 40, 183–206
 tree image (click image for full size) 
tree image
Figure 23 from Wolfe et al. (2016).