Leontiniidae

{{Short description|Extinct family of mammals}}

{{Automatic taxobox

| fossil_range = Middle Eocene-Late Miocene
(Mustersan-Huayquerian)
~{{Fossil range|48.6|7.3}}

| image = Leontinia.jpg

| image_caption = Leontinia gaudryi

| taxon = Leontiniidae

| authority = Ameghino, 1895

| subdivision_ranks = Genera

| subdivision_ref = {{fossilworks |id=43373 |title=Leontiniidae |date=3 June 2022}}

| subdivision =

• Anayatherium {{small|Shockey, 2005Bruce J. Shockey. [http://www.flmnh.ufl.edu/bulletin/shockeylowres.pdf New leontinids (Class Mammalia, order Notoungulata, family Leontiniidae) from the Salla beds of Bolivia (Deseadan, Late Oligocene)]. Bull. Fla. Mus. Nat. Hist. (2005) 45(4): 249–260}}
• Ancylocoelus {{small|Ameghino, 1895}}
• Colpodon {{small|Burmeister, 1885}}
• Coquenia {{small|Deraco et al., 2008}}
• Elmerriggsia {{small|Shockey et al., 2012}}
• Gualta {{small|Cerdeño & Vera, 2015{{Cite journal|author=Esperanza Cerdeño and Bárbara Vera |year=2014 |title=A new Leontiniidae (Notoungulata) from the Late Oligocene beds of Mendoza Province, Argentina |journal=Journal of Systematic Palaeontology |volume=13 |issue=11 |pages=943–962 |doi=10.1080/14772019.2014.982727 |s2cid=83798693 |hdl=11336/59428 |hdl-access=free }}}}
• Henricofilholia {{small|Ameghino, 1901}}
• Huilatherium {{small|Villarroel & Guerrero Diaz, 1985}}
• Leontinia {{small|Ameghino, 1895}}
• Martinmiguelia {{small|Bond & López, 1995}}
• Purperia {{small|Paula Couto, 1982}}
• Pyralophodon {{small|Ameghino, 1904}}
• Rodiotherium
• Scaphops
• Scarrittia {{small|Simpson, 1934}}
• Stenogenium
• Taubatherium {{small|Soria & Alvarenga, 1989}}
• Termastherium {{small|Wyss et al., 2018}}

}}

Leontiniidae is an extinct family comprising eighteen genera of notoungulate mammals known from the Middle Eocene (Mustersan) to Late Miocene (Huayquerian) of South America.