Necromys

Necromys is a genus of South American sigmodontine rodents allied to Akodon. This genus has also been known as Cabreramys or more recently Bolomys, and the northern grass mouse has recently been transferred from Akodon.

Necromys

Wagner Machado Carlos Lemes · CC BY 2.0 · 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
AkodontiniPBDB
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 5.3 million years on record.

The record covers at least 5.333 Mya to 11.7 ka. No occurrence read is dated outside 7.246 Mya to 0 Mya.

Miocene — about 1 of 14 occurrencesMiocenePliocene — about 4 of 14 occurrencesPliocenePleistocene — about 6 of 14 occurrencesPleistoceneHolocene — about 3 of 14 occurrences7.5–7.2 Mya — about 0.0 occurrences7.2–7.0 Mya — about 0.1 occurrences7.0–6.7 Mya — about 0.1 occurrences6.7–6.5 Mya — about 0.1 occurrences6.5–6.2 Mya — about 0.1 occurrences6.2–5.9 Mya — about 0.1 occurrences5.9–5.7 Mya — about 0.1 occurrences5.7–5.4 Mya — about 0.1 occurrences5.4–5.2 Mya — about 0.0 occurrences5.2–4.9 Mya — about 0.2 occurrences4.9–4.6 Mya — about 0.6 occurrences4.6–4.4 Mya — about 0.6 occurrences4.4–4.1 Mya — about 0.6 occurrences4.1–3.9 Mya — about 0.6 occurrences3.9–3.6 Mya — about 0.4 occurrences3.6–3.4 Mya — about 0.3 occurrences3.4–3.1 Mya — about 0.3 occurrences3.1–2.8 Mya — about 0.1 occurrences2.6–2.3 Mya — about 0.3 occurrences2.3–2.1 Mya — about 0.3 occurrences2.1–1.8 Mya — about 0.3 occurrences1.8–1.5 Mya — about 0.3 occurrences1.5–1.3 Mya — about 0.3 occurrences1.3–1.0 Mya — about 0.3 occurrences1.0–775 ka Mya — about 0.3 occurrences775 ka–516 ka Mya — about 0.3 occurrences516 ka–258 ka Mya — about 0.3 occurrences258 ka–0 Mya — about 6 occurrences5.333 Mya11.7 ka7.7 Mya0 Mya

14 occurrences of Necromys on record, most of them in the Pleistocene. The Paleobiology Database records this as a living group. 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

14 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

6 formations

Monte Hermoso — 38.97°S, 61.70°WNuapua — 20.87°S, 63.07°WTafí del Valle — 26.92°S, 65.70°WPuerto Belgrano — 38.98°S, 61.82°WBotucatu — 29.56°S, 51.40°WCerro Azul — 35.69°S, 64.67°W

Loading coastlines…

The named rock units Necromys has been recovered from, largest first. Drawn where the rock is now, not where it formed. 7 occurrences have no formation on record, which is common for older literature.

Necromys and its relatives

Pleistocene

Where Necromys and its relatives were recorded in the Pleistocene.

Found in the same rock

256 taxa

The Paleobiology Database records 10 sites for Necromys, 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

12 references

Each of the 14 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. 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 Necromys

Credit
Wagner Machado Carlos Lemes
Licence
CC BY 2.0
Commercial use
the licence allows it

No 3D scan of Necromys was found in Smithsonian Open Access and Sketchfab.

MorphoSource 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 itAkodontini through timeFormations of the PleistoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Ameghino 1889