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†Helaspis Imbrie 1959
urn:lsid:organismnames.com:name:2690969
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†Helaspis Imbrie 1959
Imbrie 1959. Brachiopods of the Traverse Group (Devonian) of Michigan. Part I Dalmanellacea, Pentameracea, Strophomenacea, Orthotetacea, Chonetacea, and Productacea. Bulletin of the American Museum of Natural History, 116 1959: 351-409