Isotemnus

Isotemnus is an extinct genus of notoungulate belonging to the family Isotemnidae. It lived from the Late Paleocene to the Middle Eocene of what is now Argentina.

Isotemnus

Lmalena · CC BY-SA 4.0 · 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
IsotemnidaePBDB
Diet
herbivorePBDB, for Notoungulata
Life habit
scansorialPBDB, for Eutheria
Motility
actively mobilePBDB, for Osteichthyes
Environment
terrestrialPBDB, for Eutheria

Time the record covers

At least 14 million years on record.

The record covers at least 56 Mya to 41.03 Mya. No occurrence read is dated outside 57 Mya to 37.71 Mya.

Paleocene — about 4 of 31 occurrencesEocene — about 27 of 31 occurrencesEocene58–57 Mya — about 0.7 occurrences57–56 Mya — about 3 occurrences56–55 Mya — about 0.9 occurrences55–55 Mya — about 0.5 occurrences55–54 Mya — about 0.5 occurrences54–53 Mya — about 0.5 occurrences53–53 Mya — about 0.5 occurrences53–52 Mya — about 0.5 occurrences52–51 Mya — about 0.5 occurrences51–51 Mya — about 0.5 occurrences51–50 Mya — about 0.5 occurrences50–49 Mya — about 0.5 occurrences49–49 Mya — about 0.5 occurrences49–48 Mya — about 0.5 occurrences48–47 Mya — about 0.9 occurrences47–47 Mya — about 0.9 occurrences47–46 Mya — about 0.9 occurrences46–45 Mya — about 0.9 occurrences45–45 Mya — about 0.9 occurrences45–44 Mya — about 0.9 occurrences44–43 Mya — about 0.9 occurrences43–43 Mya — about 0.9 occurrences43–42 Mya — about 0.9 occurrences42–41 Mya — about 0.9 occurrences41–41 Mya — about 2 occurrences41–40 Mya — about 3 occurrences40–39 Mya — about 3 occurrences39–39 Mya — about 3 occurrences39–38 Mya — about 3 occurrences38–37 Mya — about 0.7 occurrences56 Mya41.03 Mya57.5 Mya37.2 Mya

31 occurrences of Isotemnus 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

31 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

2 formations

Sarmiento — 44.42°S, 68.67°WSarmiento — 45.33°S, 68.00°WSarmiento — 45.67°S, 68.67°WSarmiento — 46.74°S, 67.11°WLas Flores — 45.37°S, 67.74°WLas Flores — 45.40°S, 67.18°WLas Flores — 45.60°S, 69.08°W

Loading coastlines…

The named rock units Isotemnus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 14 occurrences have no formation on record, which is common for older literature.

Isotemnus and its relatives

Eocene

Where Isotemnus and its relatives were recorded in the Eocene.

Found in the same rock

214 taxa

The Paleobiology Database records 15 sites for Isotemnus, 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

13 references

Each of the 31 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. 1 further reference is 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 Isotemnus

Credit
Lmalena
Licence
CC BY-SA 4.0
Commercial use
the licence allows it

No 3D scan of Isotemnus was found in Sketchfab.

Smithsonian Open Access and MorphoSource were 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 itIsotemnidae through timeFormations of the EoceneThe world it lived on

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