Paleogene terrestrial vertebrates: northernmost occurrence, ellesmere island, Canada.

Recently discovered Paleogene land vertebrates from the Eureka Sound Formation at about latitude 78 degrees north in Arctic Canada include fish, turtles, an alligatorid, and several taxa of mammals. The assemblage, which is probably early or middle Eocene in age, adds to previously known paleobotanical evidence in suggesting temperate to warm-temperate climatic conditions.