Isotemnidae

Isotemnidae is a paraphyletic extinct family of notoungulate mammals known from the Early Eocene (Itaboraian) to Middle Miocene of South America.

Isotemnidae

Ghedoghedo · 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
ToxodontiaPBDB
Diet
herbivorePBDB, for Notoungulata
Life habit
scansorialPBDB, for Eutheria
Motility
actively mobilePBDB, for Osteichthyes
Environment
terrestrialPBDB, for Eutheria

Time the record covers

At least 27 million years on record.

The record covers at least 56 Mya to 29 Mya. No occurrence read is dated outside 57 Mya to 21 Mya.

Paleocene — about 6 of 150 occurrencesEocene — about 137 of 150 occurrencesEoceneOligocene — about 6 of 150 occurrencesOligoceneMiocene — about 1 of 150 occurrences58–56 Mya — about 3 occurrences56–55 Mya — about 6 occurrences55–54 Mya — about 5 occurrences54–53 Mya — about 5 occurrences53–51 Mya — about 5 occurrences51–50 Mya — about 5 occurrences50–49 Mya — about 5 occurrences49–48 Mya — about 6 occurrences48–46 Mya — about 10 occurrences46–45 Mya — about 10 occurrences45–44 Mya — about 10 occurrences44–43 Mya — about 10 occurrences43–41 Mya — about 8 occurrences41–40 Mya — about 13 occurrences40–39 Mya — about 18 occurrences39–38 Mya — about 18 occurrences38–37 Mya — about 2 occurrences37–35 Mya — about 1 occurrence35–34 Mya — about 1 occurrence34–33 Mya — about 1.0 occurrences33–32 Mya — about 1.0 occurrences32–30 Mya — about 1.0 occurrences30–29 Mya — about 1.0 occurrences29–28 Mya — about 0.9 occurrences28–27 Mya — about 0.6 occurrences27–25 Mya — about 0.3 occurrences25–24 Mya — about 0.3 occurrences24–23 Mya — about 0.3 occurrences23–22 Mya — about 0.3 occurrences22–20 Mya — about 0.1 occurrences56 Mya29 Mya57.7 Mya20.3 Mya

150 occurrences of Isotemnidae on record, most of them in the Eocene. 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

150 occurrences

These 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

9 formations

Sarmiento — 44.38°S, 68.75°WSarmiento — 44.42°S, 68.67°WSarmiento — 45.40°S, 67.72°WSarmiento — 45.33°S, 68.00°WSarmiento — 45.67°S, 68.67°WSarmiento — 45.77°S, 69.00°WSarmiento — 46.68°S, 68.35°WSarmiento — 46.74°S, 67.11°WSarmiento — 44.50°S, 66.00°WLas Flores — 45.37°S, 67.74°WLas Flores — 45.40°S, 67.18°WLas Flores — 45.60°S, 69.08°WGeste — 26.06°S, 67.41°WCasamayor — 45.35°S, 68.37°WLumbrera — 25.52°S, 65.53°WAbanico — 34.98°S, 70.43°WDeseado — 47.90°S, 66.25°WKoluel Kaike — 45.27°S, 67.00°WCasa Grande — 23.32°S, 65.56°W

Loading coastlines…

The named rock units Isotemnidae has been recovered from, largest first. Drawn where the rock is now, not where it formed. 72 occurrences have no formation on record, which is common for older literature.

Isotemnidae and its relatives

Eocene

Where Isotemnidae and its relatives were recorded in the Eocene.

Found in the same rock

401 taxa

The Paleobiology Database records 55 sites for Isotemnidae, and this reads all 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

24 references

Each of the 150 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. 12 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 Isotemnidae

Credit
Ghedoghedo
Licence
CC BY-SA 3.0
Commercial use
the licence allows it

No 3D scan of Isotemnidae 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

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 itToxodontia through timeFormations of the EoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Ameghino 1897