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†Effnaspis Dean 1972
urn:lsid:organismnames.com:name:2235999
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415
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†Effnaspis Dean 1972
Dean 1972. The isocolid trilobites Cyphoniscus Salter, 1853 and Effnaspis gen. nov. in the Appalachian region of Canada and USA. Canadian J Earth Sci, 9(4) 1972: 415-421