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Extinct suborder of mammals
Toxodontia is a suborder of the meridiungulate order Notoungulata. Most of the members of the five included families, including the largest notoungulates
Toxodontia
Extinct order of hoofed mammals
having been described, divided into two major subgroupings, Typotheria and Toxodontia. Notoungulates first diversified during the Eocene. Their diversity declined
Notoungulata
Extinct suborder of mammals
Mesotherium. Typotheres all possess a clavicle, unlike other notoungulates in Toxodontia. They have narrow phalanges (the bones of the digits) and claw-like nails
Typotheria
Extinct genus of notoungulates
only species is M. archaeios. The genus is the oldest known member of Toxodontia. The holotype, and only specimen of Maizotemnus (given the specimen number
Maizotemnus
Extinct genus of chalicothere
Richard. "Part 3. Containing the Order Ungulata, Suborders Perissodactyla, Toxodontia, Condylarthra, and Amblypoda". Catalogue of the Fossil Mammalia in the
Anisodon
This is an incomplete list of prehistoric mammals. It does not include extant mammals or recently extinct mammals. For extinct primate species, see: list
List_of_prehistoric_mammals
Extinct family of mammals
O. R.; Bergqvist, L. P.; García-López, D. A. (2025). "First record of Toxodontia for the Itaboraí Basin (Paleogene, Rio de Janeiro, Brazil) and comments
Isotemnidae
Extinct genus of mammal
Trigodon is placed within the family Toxodontidae, within the suborder Toxodontia. It is considered closest to Paratrigodon. Historically, the genus Adinotherium
Trigodon
Taxonomy of mammals
†Notioprogonia Family †Henricosborniidae Family †Notostylopidae Suborder †Toxodontia Family †Isotemnidae Family †Leontiniidae Family †Notohippidae Family †Toxodontidae
Mammal_classification
Extinct genus of notoungulates
WB. Mammalia of the Santa Cruz Beds. Volume VI, Paleontology. Part II, Toxodontia. In: Scott WB, editor. Reports of the Princeton University Expeditions
Toxodon
anatomy, palaeoneurology, and implications for the evolution of early Toxodontia". Papers in Palaeontology. 12 (2) e70082. Bibcode:2026PPal...1270082V
2026_in_paleomammalogy
Extinct family of mammals
Flynn, and D. A. Croft. 2018. New Paleogene Notohippids and Leontiniids (Toxodontia; Notoungulata; Mammalia) from the Early Oligocene Tinguiririca Fauna of
Leontiniidae
Extinct order of hoofed mammals
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Litopterna
Extinct family of mammals
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Notohippidae
South American land mammal age
; Croft, Darin A. (2018), "New Paleogene notohippids and leontiniids (Toxodontia; Notoungulata; Mammalia) from the Early Oligocene Tinguiririca Fauna of
Divisaderan
Extinct species of ungulate
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Amilnedwardsia
Extinct genus of astrapothere
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Xenastrapotherium
Genus of mammals
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Campanorco
Extinct genus of mammals
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Mixotoxodon
Period of geologic time (29.0–21.0 Ma)
; Croft, Darin A. (2018), "New Paleogene notohippids and leontiniids (Toxodontia; Notoungulata; Mammalia) from the Early Oligocene Tinguiririca Fauna of
Deseadan
Extinct genus of notoungulates
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Leontinia
Extinct genus of camel-like ungulate
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Macrauchenia
Extinct genus of mammals
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Notonychops
Extinct genus of mammals
leontiniid coquenia bondi Deraco, Powell, & López, 2008 (Notoungulata, Toxodontia) from the Eocene of Northwestern Argentina". Historical Biology. 37 (2):
Coquenia
Extinct genus of litopterns
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Thoatherium
Extinct genus of mammals
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Paginula
Extinct genus of litopterns
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Eoauchenia
Extinct genus of litopterns
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Micrauchenia
Extinct genus of notoungulates
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Archaeogaia
Monotypic genus of extinct mammals from Venezuela
Toxodontia Pampahippus Leontinia Scarrittia Rhynchippus Proadinotherium Nesodontinae Adinotherium Nesodon Toxodontinae Palyeidodon Hyperoxotodon Piauhytherium
Falcontoxodon
Extinct clade of mammals
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
South American native ungulates
South_American_native_ungulates
O. R.; Bergqvist, L. P.; García-López, D. A. (2025). "First record of Toxodontia for the Itaboraí Basin (Paleogene, Rio de Janeiro, Brazil) and comments
2025_in_paleomammalogy
Extinct genus of mammals
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Comahuetherium
Extinct subfamily of mammals
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Interatheriinae
Extinct order of mammals
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Astrapotheria
Formation Deraco, Virginia; García López, Daniel A. (2015), "A new Eocene Toxodontia (Mammalia, Notoungulata) from northwestern Argentina", Journal of Vertebrate
Salta_Basin
Extinct family of mammals
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Uruguaytherium
Extinct genus of mammals
Juan D. Carillo and Robert J. Asher performed a phylogenetic analysis of Toxodontia. They recovered homalodotheres, specifically Asmodeus and Homalodotherium
Homalodotherium
Extinct family of notoungulate mammals
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Toxodontidae
Extinct genus of notoungulates
Typotheria, and the intermediate crest, present in members of the suborder Toxodontia, were absent. Nanolophodon was distinguished from its relatives by the
Nanolophodon
Family in the extinct order Litopterna
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Macraucheniidae
Extinct genus of mammals
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Liarthrus
Extinct species of fish
C. (2025-07-30). "Maizotemnus archaeios gen. nov. sp. nov. the oldest Toxodontia (Mammalia, Panperissodactyla, Notoungulata) and the first South American
Hoplisoma_revelatum
Extinct genus of litopterns
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Polymorphis
Extinct genus of mammals
Croft, Darin A. (2018-06-25). "New Paleogene Notohippids and Leontiniids (Toxodontia; Notoungulata; Mammalia) from the Early Oligocene Tinguiririca Fauna of
Eomorphippus
Extinct genus of notoungulates
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Mendozahippus
Extinct genus of notoungulates
to be the sister taxon to Mendozahippus. The following position of the Toxodontia is based on Martínez et al. 2021, showing the position of Teushentherium
Teushentherium
Extinct genus of litopterns
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Xenorhinotherium
Extinct genus of mammals
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Umayodus
Extinct mammal of South America
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Notohippus
Extinct family of mammals
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Oldfieldthomasiidae
Extinct genus of mammals
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Pyrotherium
Taxonomy of a fossil mammal genus
History): Part III. Containing the Order Ungulata, Suborders Perissodactyla, Toxodontia, Condylarthra, and Amblypoda. Order of the Trustees, London. Filhol, Henri
Taxonomy_of_Lophiodon
Extinct family of mammals
Class: Mammalia Infraclass: Placentalia Order: †Notoungulata Suborder: †Toxodontia Family: †Homalodotheriidae Gregory 1910 Genera †Asmodeus †Chasicotherium
Homalodotheriidae
Genus of mammals (fossil)
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Trigonostylops
Extinct genus of notoungulates
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Pericotoxodon
Peruvian fossils
may represent the same species, a sheep-sized member of the suborder Toxodontia. A single, very small tooth may belong to a member of the toxodont family
Santa_Rosa_local_fauna
leontiniid Coquenia bondi Deraco, Powell, & López, 2008 (Notoungulata, Toxodontia) from the Eocene of Northwestern Argentina". Historical Biology: An International
2024_in_paleomammalogy
Extinct genus of notoungulates
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Prohegetotherium
Extinct genus of notoungulates
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Pisanodon
Extinct genus of notoungulates
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Pachyrukhos
Extinct genus of mammals
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Adinotherium
Extinct genus of notoungulates
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Interatherium
Extinct family of mammals
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Didolodontidae
Extinct genus of indeterminate Notoungulate
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Carolodarwinia
Sedimentary basin in Argentina
; Croft, Darin A. (2018), "New Paleogene notohippids and leontiniids (Toxodontia; Notoungulata; Mammalia) from the Early Oligocene Tinguiririca Fauna of
Golfo_San_Jorge_Basin
Extinct genus of notoungulates
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Nesodon
Extinct family of mammals
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Hegetotheriidae
Extinct genus of notoungulates
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Morphippus
Extinct genus of notoungulates
Miocene genera Argyrohippus and Notohippus. The following position of the Toxodontia is based on Martínez et al. 2021, showing the position of Moqueguahippus
Moqueguahippus
Geologic formation in Ecuador
maddeni Nabón basin Several osteoderms. An armadillo. Anadasypus A. aequatorianus RHM Locality 4 A member of cingulata. Toxodontia Indeterminate A toxodont.
Letrero_Formation
Extinct genus of litopterns
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Huayqueriana
Extinct genus of litopterns
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Theosodon
Extinct genus of mammals
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Olisanophus
Extinct genus of notoungulates
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Hegetotherium
Extinct genus of mammals
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Astrapotherium
Extinct order of mammals
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Pyrotheria
Extinct genus of litopterns
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Coniopternium
Geologic timescale for prehistoric South American fauna
Formation Deraco, Virginia; García López, Daniel A. (2015), "A new Eocene Toxodontia (Mammalia, Notoungulata) from northwestern Argentina", Journal of Vertebrate
South American land mammal age
South_American_land_mammal_age
Extinct genus of mammals
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Asmodeus_(mammal)
Extinct genus of mammals
Toxodontia Pampahippus Leontinia Scarrittia Rhynchippus Proadinotherium Nesodontinae Adinotherium Nesodon Toxodontinae Palyeidodon Hyperoxotodon Piauhytherium
Piauhytherium
Extinct genus of mammals
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Didolodus
Extinct genus of mammals
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Xotodon
Extinct genus of notoungulates
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Proadinotherium
Extinct genus of ungulate from South America
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Protheosodon
Extinct family of mammals
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Interatheriidae
Extinct genus of notoungulates
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Teratopithecus
Extinct genus of notoungulates
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Archaeohyrax
Extinct genus of litopterns
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Notiolofos
Extinct genus of notoungulates
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Paedotherium
Extinct genus of mammals
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Antarctodon
Extinct subfamily of mammals
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Cramaucheniinae
Extinct genus of mammals
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Granastrapotherium
Extinct genus of astrapotheriid mammals
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Hilarcotherium
Geologic formation in Chubut Province, Argentina
Croft, Darin A. (2018-06-25). "New Paleogene Notohippids and Leontiniids (Toxodontia; Notoungulata; Mammalia) from the Early Oligocene Tinguiririca Fauna of
Sarmiento_Formation
Extinct genus of litopterns
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Lambdaconus
Extinct family of litopterns
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Proterotheriidae
Extinct genus of mammals
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Notostylops
Extinct genus of mammals
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Punahyrax
Extinct genus of mammals
Chilestylops Edvardotrouessartia Homalostylops Notostylops Otrhonia Parastylops †Toxodontia †Homalodotheriidae Asmodeus Chasicotherium Homalodotherium Trigonolophodon
Archaeotypotherium
TOXODONTIA
TOXODONTIA
TOXODONTIA
TOXODONTIA
TOXODONTIA
TOXODONTIA
TOXODONTIA
TOXODONTIA
TOXODONTIA
n.pl.
An extinct order of Mammalia found in the South American Tertiary formation. The incisor teeth were long and curved and provided with a persistent pulp. They are supposed to be related both to the rodents and ungulates. Called also Toxodontia.