Toxodontia
Toxodontia is a suborder of the meridiungulate order Notoungulata. Most of the members of the five included families, including the largest notoungulates, share several dental, auditory and tarsal specializations. The group is named after Toxodon, the first example of the group to be discovered by science.

Sergiodlarosa (Sergio De La Rosa) · CC BY-SA 3.0 · via Wikipedia/Commons. May be a photograph of a specimen, or an artist’s reconstruction — an interpretation of a skeleton, since colour and soft tissue are almost never preserved.
On record
Recorded, not inferred- Sits inside
- NotoungulataPBDB
- Diet
- herbivorePBDB, for Notoungulata
- Life habit
- scansorialPBDB, for Eutheria
- Motility
- actively mobilePBDB, for Osteichthyes
- Environment
- terrestrialPBDB, for Eutheria
Time the record covers
At least 55 million years on record.
The record covers at least 56 Mya to 11.7 ka. No occurrence read is dated outside 57 Mya to 0 Mya.
793 occurrences of Toxodontia on record, most of them in the Miocene. Bar height is expected occurrences, not a count: each fossil is spread across the span it is dated to, so a tall narrow bar means tight dating and a low wide one means loose.
When
793 occurrencesThese are dates about fossils, not the animal: the record can only begin after it arose and end before it died out, so either end may reach further. Shares are expected occurrences: a fossil dated to a span is counted partly in each period it straddles. More on what this infers.
Found in
102 formations
- Sarmiento Formation122
- Santa Cruz Formation87
- Solimões Formation28
- Ituzaingo Formation16
- La Victoria Formation · Honda Group16
- Solimoes Formation15
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The named rock units Toxodontia has been recovered from, largest first. Drawn where the rock is now, not where it formed. 78 further formations hold fewer occurrences each and are not listed. 234 occurrences have no formation on record, which is common for older literature.
Toxodontia and its relatives
MioceneWhere Toxodontia and its relatives were recorded in the Miocene.
Found in the same rock
1,948 taxa- Toxodon27 sites
- Toxodontidae19 sites
- Huilatherium pluripicatum17 sites
- Smilodon populator16 sites
- Adinotherium15 sites
- Equus15 sites
- Hapalops15 sites
- Archaeopithecus rogeri14 sites
- Gomphotheriidae14 sites
- Notiomastodon platensis14 sites
- Eremotherium laurillardi13 sites
- Glyptodon13 sites
- Henricosbornia lophodonta13 sites
- Megalonychidae13 sites
- Mixotoxodon larensis13 sites
- Notopithecus adapinus13 sites
- Pleurostylodon modicus13 sites
- Testudines13 sites
- Trigonostylops wortmani13 sites
- Antepithecus brachystephanus12 sites
- Cladosictis patagonica12 sites
- Glyptodon clavipes12 sites
- Interatherium extensus12 sites
- Notostylops12 sites
The Paleobiology Database records 396 sites for Toxodontia, and this reads 240 of them. The number is how many of those sites it was catalogued from too. The 24 sharing the most are listed.
This is not a list of everything alive at the time. It is only what has come out of the same ground as this animal and been written down.
Entered from
262 references- The beginning of the age of mammals in South America. Part II78
- Biostratigraphy of the Casamayoran, Early Eocene of Patagonia37
- Georeferencing fossiliferous localities from Solimões and Acre Basins (Brazil) -what we know so far about Solimões Formation and future perspectives29
- Paleobiology of Santacrucian native ungulates (Meridiungulata: Astrapotheria, Litoptera and Notoungulata)27
- New Leontiniid Notoungulate24
- Vertebrate paleontology, geology, and geochronology of the Tapera de López and Scarritt Pocket, Chubut Province, Argentina18
- The Leontiniidae (Mammalia, Notoungulata) from the Sarmiento Formation at Gran Barranca, Chubut Province, Argentina16
- Miocene vertebrates from Entre Rios province, eastern Argentina16
- Bioestratigrafía de la Formación Santa Cruz (Mioceno Inferior) en el extremo sudeste de la Patagonia15
- A new Toxodontid Notoungulate12
- The Acre vertebrate fauna: Age, diversity, and geography11
- Noticias preliminares sobre nuevos mamíferos fósiles del Cretáceo superior y Terciario inferior de la Patagonia11
Each of the 793 occurrences read was entered from one of these publications, ordered by how many each accounts for. This is not a search for papers mentioning the name. 250 further references are not listed. Entries link to doi.org where the Paleobiology Database holds an identifier, and to its own record where it does not. Relayed as the Paleobiology Database holds them, not checked against what they resolve to.
Media and terms
Media content1
Picture of Toxodontia
- Source
- Wikipedia/Commons
- Credit
- Sergiodlarosa (Sergio De La Rosa)
- Licence
- CC BY-SA 3.0
- Commercial use
- the licence allows it
No 3D scan of Toxodontia was found in MorphoSource and Sketchfab.
Smithsonian Open Access was not reached for this taxon, so this list is what the others held rather than everything there is.
The description on this site
- Source
- Wikipedia, “Toxodontia”
- Licence
- CC BY-SA 4.0
This is what the site found, which is not the same as what exists.
Keep going
What may have been alongside itNotoungulata through timeFormations of the MioceneThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Ameghino 1887