Molecular divergence time estimates treating Tetraophthalmi as stem-Cyphophthalmi. Ingroup clade sizes are not to scale. Numbers on nodes are in Ma.
Russell J. Garwood, Prashant P. Sharma, Jason A. Dunlop , Gonzalo Giribet
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Garwood, Russell J. et al. A Paleozoic Stem Group to Mite Harvestmen Revealed through Integration of Phylogenetics and Development. <i>Current Biology</i>, Volume 24 , Issue 9 , 1017 - 1023. <a href="//doi.org/10.1016/j.cub.2014.03.039" class="extiw" title="doi:10.1016/j.cub.2014.03.039">doi:10.1016/j.cub.2014.03.039</a>