Monosaulax

Monosaulax is an extinct genus of beaver-grouped rodents. It is sometimes treated as a synonym of Eucastor.

Monosaulax

via iDigBio · 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
CastoroidiniPBDB
Diet
browserPBDB, for Castoridae
Life habit
amphibiousPBDB, for Castoridae
Motility
actively mobilePBDB, for Osteichthyes
Environment
terrestrialPBDB, for Eutheria

Time the record covers

At least 18 million years on record.

The record covers at least 27.3 Mya to 8.725 Mya. No occurrence read is dated outside 33.9 Mya to 5.09 Mya.

Eocene — about 0 of 70 occurrencesOligocene — about 1 of 70 occurrencesOligoceneMiocene — about 69 of 70 occurrencesMiocenePliocene — about 0 of 70 occurrences34–33 Mya — about 0.1 occurrences33–32 Mya — about 0.2 occurrences32–31 Mya — about 0.2 occurrences31–30 Mya — about 0.2 occurrences30–29 Mya — about 0.2 occurrences29–28 Mya — about 0.2 occurrences28–27 Mya — about 0.2 occurrences27–26 Mya — about 0.0 occurrences23–22 Mya — about 0.3 occurrences22–21 Mya — about 0.5 occurrences21–20 Mya — about 0.5 occurrences20–19 Mya — about 0.3 occurrences19–18 Mya — about 0.3 occurrences18–17 Mya — about 3 occurrences17–16 Mya — about 3 occurrences16–16 Mya — about 10 occurrences16–15 Mya — about 12 occurrences15–14 Mya — about 12 occurrences14–13 Mya — about 12 occurrences13–12 Mya — about 3 occurrences12–11 Mya — about 2 occurrences11–9.5 Mya — about 2 occurrences9.5–8.5 Mya — about 0.8 occurrences8.5–7.5 Mya — about 2 occurrences7.5–6.5 Mya — about 2 occurrences6.5–5.5 Mya — about 2 occurrences5.5–4.5 Mya — about 0.6 occurrences27.3 Mya8.725 Mya34.5 Mya4.5 Mya

70 occurrences of Monosaulax 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

70 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

23 formations

Valentine — 42.70°N, 100.00°WValentine — 42.49°N, 98.11°WValentine — 42.80°N, 100.80°WValentine — 42.81°N, 100.05°WValentine — 40.02°N, 98.53°WValentine — 42.78°N, 100.03°WFort Randall — 43.53°N, 99.13°WFort Randall — 43.10°N, 98.30°WFort Randall — 43.49°N, 99.27°WEsmeralda — 38.25°N, 117.90°WOlcott — 42.19°N, 103.73°WOlcott — 42.40°N, 103.80°WBarstow — 34.80°N, 117.00°WMascall — 44.00°N, 120.13°WPawnee Creek — 40.80°N, 104.20°WSnake Creek — 42.40°N, 103.80°WCalvert — 39.20°N, 75.60°WStatenville — 30.90°N, 82.90°WColter — 43.90°N, 110.80°WDeer Butte — 43.60°N, 117.50°WButte Creek — 43.60°N, 117.50°WVirgin Valley — 41.10°N, 117.80°WTemblor — 36.10°N, 120.40°WHannoba — 41.47°N, 115.31°ERunningwater — 42.20°N, 103.10°WSheep Creek — 42.15°N, 103.70°WMadison Valley — 45.93°N, 111.29°WEdelény — 48.39°N, 20.64°EMonarch Mill — 39.20°N, 117.90°WHanjiajing — 36.06°N, 103.79°EAral — 50.20°N, 66.80°E

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The named rock units Monosaulax has been recovered from, largest first. Drawn where the rock is now, not where it formed. 27 occurrences have no formation on record, which is common for older literature.

Monosaulax and its relatives

Miocene

Where Monosaulax and its relatives were recorded in the Miocene.

Found in the same rock

1,176 taxa

The Paleobiology Database records 67 sites for Monosaulax, 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

39 references

Each of the 70 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. 27 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 Monosaulax

Source
iDigBio
Credit
via iDigBio
Licence
not stated by the source
Commercial use
cannot be read from the licence given — check the record

No 3D scan was found. Smithsonian Open Access, MorphoSource and Sketchfab were all searched.

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 itCastoroidini through timeFormations of the MioceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Stirton 1935