Project 2804: J.D. Beech, J.C. Lamsdell. 2021. Phylogeny, disparity, and mass extinction response in the trilobite order Harpetida. Papers in Palaeontology. Online:1-21.
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dorsal brim
dorsal cephalon
dorsal thorax
dorsal trilobite
Various
ventral cephalon
ventral trilobite