Detailed information for reference 33876Stormer, L., A. Petrunkevitch, and J.W. Hedgpeth (1955) Treatise on Invertebrate Paleontology, Part P, Arthropoda 2, Chelicerata with sections on Pycnogonida and Palaeoisopus. Moore, R.C. (ed.) Geological Society of America and University of Kansas Press. , 123 figs.
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