. . . . . . . . "Neoephemera antiqua"@en . . . . . . . . "Holotype naiad"@en . "1085083623"^^ . . . . . . . . . . . . . . . . "yes"@en . . . . "Neoephemera antiqua"@en . . . . . . . . . . . . . "32710797"^^ . . . . . "Neoephemera antiqua is an extinct species of square-gill mayfly in the family Neoephemeridae that is known from early Eocene, Ypresian stage, lake deposits near the small community of Republic in Ferry County, Washington, USA."@en . . "Neoephemera antiqua is an extinct species of square-gill mayfly in the family Neoephemeridae that is known from early Eocene, Ypresian stage, lake deposits near the small community of Republic in Ferry County, Washington, USA."@en . . . . . . . . "Sinitchenkova, 1999"@en . . . . . . . "4982"^^ . . . .