Walcott, C. D. (1912). Middle Cambrian Branchiopoda, Malacostraca, Trilobita and Merostomata. In: Cambrian geology and paleontology. II. Smithsonian Miscellaneous Collections. 57(6): 145-228.
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Walcott, C. D.
1912
Middle Cambrian Branchiopoda, Malacostraca, Trilobita and Merostomata. In: Cambrian geology and paleontology. II.