Gnathabelodon

Gnathabelodon is an extinct proboscidean (elephant) genus endemic to North America that includes species that lived during the Middle to Late Miocene. They were called "Spoon-billed Mastodons" since their lower jaw was elongated and shaped like a shoe-horn or spoon. The genus "Gnathabelodon" consists of two species: Thorpe's Spoon-billed Mastodon ("G. thorpei") and Buckner's Spoon-billed Mastodon ("G. buckneri"). The flaring of the tip of their lower jaw was similar to that of the "shovel-tuskers" (Platybelodon and Amebelodon) however "Gnathabelodon" species are distinct in having no lower tusks whilst the "shovel tuskers" have broad, flattened lower tusks. In respects to dentition and overall body form, it was similar to other species of "Gomphotherium".

ources

[Barbour, E.H. and Sternberg, G. (1935). Gnathabelodon thorpei, gen. et sp. nov. A new mud-grubbing mastodon.Bulletin of the Nebraska State Museum, 42: 395-404.] Barbour, E.H. and Sternberg, G. (1935). Gnathabelodon thorpei, gen. et sp. nov. A new mud-grubbing mastodon. Bulletin of the Nebraska State Museum, 42: 395-404.

* "A Pictorial Guide to Fossils" by Gerard Ramon Case
* "Classification of Mammals" by Malcolm C. McKenna and Susan K. Bell