Ischyromys typus

Ischyromys typus

via iDigBio · CC0 · via iDigBio. 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
IschyromysPBDB
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 2.1 million years on record.

The record covers at least 33.9 Mya to 31.8 Mya. No occurrence read is dated outside 37 Mya to 29.5 Mya.

Eocene — about 8 of 48 occurrencesEoceneOligocene — about 40 of 48 occurrencesOligocene37–37 Mya — about 0.2 occurrences37–37 Mya — about 0.7 occurrences37–36 Mya — about 0.7 occurrences36–36 Mya — about 0.7 occurrences36–36 Mya — about 0.7 occurrences36–36 Mya — about 0.7 occurrences36–35 Mya — about 0.7 occurrences35–35 Mya — about 0.7 occurrences35–35 Mya — about 0.7 occurrences35–34 Mya — about 0.7 occurrences34–34 Mya — about 0.7 occurrences34–34 Mya — about 2 occurrences34–34 Mya — about 5 occurrences34–33 Mya — about 5 occurrences33–33 Mya — about 5 occurrences33–33 Mya — about 5 occurrences33–32 Mya — about 5 occurrences32–32 Mya — about 5 occurrences32–32 Mya — about 5 occurrences32–32 Mya — about 1 occurrence32–31 Mya — about 0.5 occurrences31–31 Mya — about 0.5 occurrences31–31 Mya — about 0.5 occurrences31–30 Mya — about 0.5 occurrences30–30 Mya — about 0.5 occurrences30–30 Mya — about 0.5 occurrences30–30 Mya — about 0.5 occurrences30–29 Mya — about 0.1 occurrences33.9 Mya31.8 Mya37.5 Mya29 Mya

48 occurrences of Ischyromys typus on record, most of them in the Oligocene. 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

48 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

4 formations

Brule — 42.80°N, 103.10°WBrule — 40.80°N, 103.10°WBrule — 43.30°N, 102.50°WBrule — 46.90°N, 102.80°WBrule — 43.90°N, 102.40°WBrule — 42.40°N, 103.80°WBrule — 43.20°N, 103.20°WBrule — 43.71°N, 102.58°WBrule — 43.85°N, 102.50°WBrule — 43.76°N, 101.93°WWhite River — 43.20°N, 108.20°WWhite River — 40.80°N, 103.10°WCypress Hills — 49.80°N, 109.00°WFlorissant — 38.93°N, 105.28°W

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The named rock units Ischyromys typus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 11 occurrences have no formation on record, which is common for older literature.

Ischyromys typus and its relatives

Oligocene

Where Ischyromys typus and its relatives were recorded in the Oligocene.

Found in the same rock

276 taxa

The Paleobiology Database records 48 sites for Ischyromys typus, 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

19 references

Each of the 48 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. 7 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 content2

Picture of Ischyromys typus

Source
iDigBio
Credit
via iDigBio
Licence
CC0
Commercial use
the licence allows it

CT scan

Licence
In Copyright
Commercial use
cannot be read from the licence given — check the record
Specimen
Ischyromys typus · amnh:fm:694

This is what the site found, which is not the same as what exists.

Keep going

What may have been alongside itIschyromys through timeFormations of the OligoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Leidy 1856