Eupelor
Eupelor is a dubious genus of prehistoric amphibian belonging to the temnospondyl family Metoposauridae. Fossils have been found in present-day Pennsylvania, within the Newark Supergroup, dating to the Late Triassic (Norian). Taxonomy. The "Eupelor" type species, "E. durus", was named "Mastodonsaurus durus" by Edward Drinker Cope in 1866 on the basis of AMNH 3927, a number of clavicles and the tooth AMNH 2333 (which could have belonged to a different temnospondyl apart from "Eupelor"), from the Lockatong Formation (Phoenixville Tunnel site) of Phoenixville, Pennsylvania. In 1868 Cope allocated the species to its own genus, "Eupelor", based on differences  from "Metoposaurus" (then known as "Metopias"). Colbert and Imbrie (1956) reviewed all Triassic metoposaurids and concluded that "Eupelor" should be used for all metoposaurids from North America, especially "Koskinonodon" (now known as "Anaschisma"). The authors considered the trematosaur "Calamops" a possible synonym of "Eupelor". Later, Chowdbury (1965) subsumed "Eupelor" into "Metoposaurus" along with other North American metoposaurids. Hunt (1993), however, treated "Eupelor" as a dubious genus of metoposaurid due to its non-diagnostic nature.