File:Evolutionary implications of the jianfengiid anatomy and artistic reconstructions of Fortiforceps foliosa and Sklerolibyon maomima gen. et sp. nov. in early Cambrian Gondwanian seas.png

English: Evolutionary implications of the jianfengiid anatomy and artistic reconstructions of Fortiforceps foliosa and Sklerolibyon maomima gen. et sp. nov. in early Cambrian Gondwanian seas. a, left: Simplified consensus cladogram showing the position as earliest euarthropods of S. maomima gen. et sp. nov. and other jianfengiids in the panarthropod evolutionary tree. The position of Parapeytoia is considered doubtful and the result of a methodological limitation (see main text and Supplementary Text); Right: Head diagrams of a generalized anomalocaridid (bottom), a Fortiforceps-like jianfengiid (middle) and a waptiid hymenocarine (top), showing topological relationships between cephalic features, notably frontal appendages, anterior sensory organs and eyes. In blue are neural features corresponding to the protocerebrum, and in green those of the deutocerebrum; we thus represent here a hypothesis of ancestral deutocerebral homology of the frontalmost arthrodized appendage. b, drawing by Dinghua Yang