Abstract

Charles Alexandre LeSueur discovered the common map turtle Graptemys geographica in 1816. He named the species Testudo geographica in 1817 and described it with a drawing of a specimen he collected from a Lake Erie marsh, but further details on the collecting locality were not given. I designate the drawn specimen as the lectotype of the species and review historical documents and specimen records that allow restriction of the type locality to the peninsula of Presque Isle and adjacent Presque Isle Bay in Erie County, Pennsylvania.

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