Cephalic and Limb Anatomy of a New Isoxyid from the Burgess Shale and the Role of “Stem Bivalved Arthropods” in the Disparity of the Frontalmost Appendage (original) (raw)
Fig 7
Decomposition of the tridimensional morphospace of the frontalmost appendages.
Optimal clusterings found by the k-means analysis of the morphospace constrained by the Calinski criterium. A. LOP cluster (lobopodians, opabiniids and Cassubia). B. ANO, “_Anomalocaris_-type” cluster. C. HUR, “_Hurdia_-type” cluster (and tentatively, Sanctacaris). D. MPS, intermediate morphologies of Kiisortoqia, Kunmingella and Occacaris. E. MEC, megacheirans and chelicerates. F. ANT, antennulate morphologies.