Perimys

Perimys is an extinct genus of neoepiblemid rodent that lived from the Early to Late Miocene in what is now South America. Fossils have been found in the Cerro Bandera, Cerro Boleadoras, Ituzaingó, Santa Cruz, and Sarmiento Formations of Argentina, and the Galera, Santa Cruz, and Río Frías Formations of Chile.

Perimys

Vizcaino, S. F., Bargo, M. S., Pérez, M. E., Aramendía, I., Cuitiño, J. I., Monsalvo, E. S., & Kay, R. F. (2022) · CC BY 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
NeoepiblemidaePBDB
Diet
herbivorePBDB, for Rodentia
Life habit
ground dwellingPBDB, for Rodentia
Motility
actively mobilePBDB, for Osteichthyes
Environment
terrestrialPBDB, for Eutheria

Time the record covers

At least 9.5 million years on record.

The record covers at least 17.5 Mya to 8 Mya. No occurrence read is dated outside 21 Mya to 5 Mya.

Miocene — about 65 of 65 occurrencesMiocenePliocene — about 0 of 65 occurrences22–21 Mya — about 0.2 occurrences21–20 Mya — about 2 occurrences20–20 Mya — about 4 occurrences20–19 Mya — about 4 occurrences19–19 Mya — about 4 occurrences19–18 Mya — about 4 occurrences18–18 Mya — about 4 occurrences18–17 Mya — about 18 occurrences17–16 Mya — about 19 occurrences16–16 Mya — about 5 occurrences16–15 Mya — about 0.5 occurrences15–15 Mya — about 0.1 occurrences15–14 Mya — about 0.1 occurrences14–14 Mya — about 0.0 occurrences8.5–7.9 Mya — about 0.0 occurrences7.9–7.3 Mya — about 0.2 occurrences7.3–6.8 Mya — about 0.2 occurrences6.8–6.2 Mya — about 0.2 occurrences6.2–5.6 Mya — about 0.2 occurrences5.6–5.1 Mya — about 0.2 occurrences5.1–4.5 Mya — about 0.0 occurrences17.5 Mya8 Mya21.5 Mya4.5 Mya

65 occurrences of Perimys 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

65 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

Santa Cruz — 51.02°S, 69.15°WSanta Cruz — 51.20°S, 69.12°WSanta Cruz — 50.27°S, 70.37°WSanta Cruz — 50.36°S, 71.84°WSanta Cruz — 50.25°S, 71.07°WSanta Cruz — 50.75°S, 69.18°WSanta Cruz — 51.35°S, 69.00°WSanta Cruz — 51.53°S, 72.09°WSanta Cruz — 47.58°S, 71.85°WSanta Cruz — 50.28°S, 70.22°WSanta Cruz — 50.28°S, 70.28°WSanta Cruz — 50.16°S, 69.68°WSanta Cruz — 50.05°S, 70.44°WPinturas — 47.17°S, 70.21°WPinturas — 47.03°S, 70.66°WPinturas — 46.99°S, 70.59°WPinturas — 48.90°S, 70.17°WPinturas — 48.97°S, 71.40°WPinturas — 48.08°S, 70.08°WGalera — 46.90°S, 72.30°WSarmiento — 45.67°S, 68.71°WSarmiento — 43.28°S, 65.48°WSarmiento — 44.59°S, 69.10°WSarmiento — 44.34°S, 65.25°WCerro Bandera — 38.88°S, 69.47°WSanta Cruz — 50.63°S, 72.47°WItuzaingo — 31.48°S, 60.23°WRío Frias — 44.58°S, 71.22°WCerro Boleadoras — 47.00°S, 71.62°W

Loading coastlines…

The named rock units Perimys has been recovered from, largest first. Drawn where the rock is now, not where it formed. 1 occurrence has no formation on record, which is common for older literature.

Perimys and its relatives

Miocene

Where Perimys and its relatives were recorded in the Miocene.

Found in the same rock

435 taxa

The Paleobiology Database records 37 sites for Perimys, 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

20 references

Each of the 65 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. 8 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 Perimys

Credit
Vizcaino, S. F., Bargo, M. S., Pérez, M. E., Aramendía, I., Cuitiño, J. I., Monsalvo, E. S., & Kay, R. F. (2022)
Licence
CC BY 3.0
Commercial use
the licence allows it

No 3D scan of Perimys 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 itNeoepiblemidae through timeFormations of the MioceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Ameghino 1887