"Libellula albifrons Burmeister, 1839" . _:b75713004 . . "Libellula albifrons" . . . . "4513986" . _:b75713004 . . _:b75713004 "GBIF id" . . _:b75713004 . "Libellula albifrons" . . _:b75713004 "4513986" . "817016" . "Burmeister, 1839" .