comment on this calibration


Lineage (NCBI): root » Eukaryota » Opisthokonta » Metazoa » Eumetazoa » Cnidaria
 node name
Cnidaria     Look for this name in NCBI   Wikipedia   Animal Diversity Web
  recommended citations Benton et al. 2015
  node minimum age
529 Ma
Olivooides multisulcatus co-occurs with Anabarites trisulcatus, which is indicative of the middle of the Fortunian Stage of the Terreneuvian Series, the first of the Cambrian. The top of the Fortunian Stage is dated at 529.0 Ma (Peng et al., 2012).
  node maximum age
636.1 Ma
A soft maximum constraint is based on the maximum age interpretation of the Lantian Biota (Yuan et al., 2011). This, together with the Doushantuo Biota (Yuan et al., 2002), provide a series of Lagerstätten preserving the biota in Orsten- and Burgess Shale-like modes of fossilization. None of these Lagerstätten, least of all the Lantian, preserves anything that could possibly be interpreted as even a total group eumetazoan and on this basis we define our soft maximum constraint at 635.5 Ma ± 0.6 Myr (Condon et al., 2005) and, thus, 636.1 Ma.
 primary fossil used to date this node 
GMPKU 3083
Olivooides multisulcatus, Qian. 1977
Location relative to the calibrated node: Crown

[show fossil details]
     Locality: near Kuanchuanpu village
     Stratum: Dengying Formation
     Geological age: Cambrian, Paleozoic

More information in Fossilworks   PaleoBioDB

  phylogenetic justification
Olivooides is known from embryonic and post-embryonic stages of development, including a polyp theca, characteristic of scyphozoans, and a medusa stage (Dong et al., 2013).
  phylogenetic reference(s)
Dong, X.-P., Cunningham, J.A., Bengtson, S., Thomas, C.-W., Liu, J.-B., Stampanoni, M., and Donoghue, P.C.J. 2013. Embryos, polyps and medusae of the early Cambrian scyphozoan Olivooides. Proceedings of the Royal Society B: Biological Sciences, 280(2
 tree image (click image for full size) 
tree image
Figure 1 from Benton et al. (2014).