Douglas Athon "Dag" Rossman (July 4, 1936 – July 23, 2015)[1] was a U.S. herpetologist specializing in garter snakes.

His wife, Nita Jane Rossman[3] (born 1936), also has an interest in herpetology and even had a subspecies named after her: Thamnophis saurita nitae, a subspecies of the eastern ribbon snake.

She had collected the holotype for this subspecies on a field trip with her husband for his dissertation research, and he named it in her honor.

[4] Rossman also wrote The Nine Worlds: A Dictionary of Norse Mythology (1983), Where Legends Live: A Pictorial Guide to Cherokee Mythic Places (1988), and several other works related to Norse mythology.

Douglas Rossman is commemorated in the scientific name of a species of Mexican garter snake, Thamnophis rossmani.