Acanthametropus_pecatonica
Acanthametropus pecatonica
Species of mayfly
Acanthametropus pecatonica, the Pecatonica River Mayfly, is a species of mayfly in the family Acanthametropodidae. It is endemic to the Pecatonica River of Wisconsin and Illinois, with populations observed in South Carolina and Georgia.[2][3][4]
Acanthametropus pecatonica was considered extinct after 1927, but was "rediscovered" in 1987, about 60 years after it was considered lost.[5] It has been found in at least five counties of Wisconsin, and historically at locations in Illinois, South Carolina, and Georgia.[3][6]