Larus perpetuusLarus perpetuus is an extinct species of gull that lived in North America during the Pliocene.EtymologyThe genus name Larus derives from Ancient Greek, referring to a seabird. The species name perpetuus derives from Latin, meaning constant or forever, referencing the "long fossil history of this species."DescriptionLarus perpetuus specimens stem from Sarasota County, Florida, and Beaufort County, North Carolina. Its bone structure most closely resembles the black-tailed gull, ring-billed gull, and Audouin's gull.