Stygimys

Stygimys is an extinct mammal genus from the Upper Cretaceous and Paleocene of North America and Russia. It was a member of the extinct order Multituberculata within the suborder Cimolodonta, family Eucosmodontidae.

Stygimys

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
EucosmodontinaePBDB
Diet
omnivorePBDB, for Eucosmodontidae
Life habit
arborealPBDB, for Multituberculata
Motility
actively mobilePBDB, for Osteichthyes
Environment
terrestrialPBDB, for Mammalia

Time the record covers

At least 8.8 million years on record.

The record covers at least 72.2 Mya to 63.4 Mya. No occurrence read is dated outside 83.6 Mya to 60.9 Mya.

Late Cretaceous — about 1 of 78 occurrencesLate CretaceousPaleocene — about 77 of 78 occurrencesPaleocene84–83 Mya — about 0.0 occurrences83–83 Mya — about 0.1 occurrences83–82 Mya — about 0.1 occurrences82–81 Mya — about 0.1 occurrences81–80 Mya — about 0.1 occurrences80–79 Mya — about 0.1 occurrences79–79 Mya — about 0.1 occurrences79–78 Mya — about 0.1 occurrences78–77 Mya — about 0.1 occurrences77–76 Mya — about 0.1 occurrences76–75 Mya — about 0.1 occurrences75–75 Mya — about 0.1 occurrences75–74 Mya — about 0.1 occurrences74–73 Mya — about 0.1 occurrences73–72 Mya — about 0.1 occurrences72–71 Mya — about 0.0 occurrences67–66 Mya — about 2 occurrences66–65 Mya — about 21 occurrences65–64 Mya — about 21 occurrences64–64 Mya — about 21 occurrences64–63 Mya — about 6 occurrences63–62 Mya — about 3 occurrences62–61 Mya — about 3 occurrences61–60 Mya — about 1 occurrence72.2 Mya63.4 Mya84.1 Mya60.4 Mya

78 occurrences of Stygimys on record, most of them in the Paleocene. 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

78 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

11 formations

Hell Creek — 47.80°N, 106.10°WHell Creek — 47.83°N, 106.18°WFort Union — 47.60°N, 107.00°WFort Union — 44.30°N, 109.00°WFort Union — 45.80°N, 109.80°WFort Union — 47.60°N, 106.20°WFort Union — 47.80°N, 106.10°WRavenscrag — 49.50°N, 109.20°W"Fort Union" (= Lebo) — 45.80°N, 109.80°WPorcupine Hills — 51.10°N, 114.28°WEl Gallo — 30.20°N, 115.79°WTullock — 47.80°N, 106.10°WBear — 46.20°N, 109.90°WPaskapoo — 51.00°N, 114.10°WNorth Horn — 39.00°N, 111.00°WBlack Peaks — 29.28°N, 103.55°W

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The named rock units Stygimys 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.

Stygimys and its relatives

Paleocene

Where Stygimys and its relatives were recorded in the Paleocene.

Found in the same rock

242 taxa

The Paleobiology Database records 55 sites for Stygimys, 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

14 references

Each of the 78 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. 2 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 Stygimys

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

No 3D scan of Stygimys 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 itEucosmodontinae through timeFormations of the PaleoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Sloan and Van Valen 1965