Machaerosaurus

No picture of Machaerosaurus was found. Wikipedia, Wikidata, iDigBio and Smithsonian Open Access were searched and had none. GBIF was asked, and what came back is not recorded: nothing, or a picture this site could not tie to Machaerosaurus, or no answer at all. This entry cannot say which.

On record

Recorded, not inferred
Sits inside
AnguidaePBDB
Diet
insectivore, carnivorePBDB, for Anguidae
Motility
actively mobilePBDB, for Osteichthyes
Environment
terrestrialPBDB, for Amniota

Time the record covers

At least 21 million years on record.

The record covers at least 72.2 Mya to 51.1 Mya. No occurrence read is dated outside 83.6 Mya to 45.9 Mya.

Late Cretaceous — about 1 of 13 occurrencesLate CretaceousPaleocene — about 10 of 13 occurrencesPaleoceneEocene — about 2 of 13 occurrencesEocene84–83 Mya — about 0.0 occurrences83–82 Mya — about 0.1 occurrences82–80 Mya — about 0.1 occurrences80–79 Mya — about 0.1 occurrences79–78 Mya — about 0.1 occurrences78–77 Mya — about 0.1 occurrences77–75 Mya — about 0.1 occurrences75–74 Mya — about 0.1 occurrences74–73 Mya — about 0.1 occurrences73–71 Mya — about 0.0 occurrences66–65 Mya — about 0.5 occurrences65–63 Mya — about 0.5 occurrences63–62 Mya — about 3 occurrences62–61 Mya — about 2 occurrences60–58 Mya — about 0.3 occurrences58–57 Mya — about 2 occurrences57–56 Mya — about 2 occurrences56–54 Mya — about 0.3 occurrences54–53 Mya — about 0.3 occurrences53–52 Mya — about 0.3 occurrences52–50 Mya — about 0.3 occurrences50–49 Mya — about 0.3 occurrences49–48 Mya — about 0.3 occurrences48–46 Mya — about 0.3 occurrences46–45 Mya — about 0.1 occurrences72.2 Mya51.1 Mya84.4 Mya45.1 Mya

13 occurrences of Machaerosaurus 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

13 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

Fort Union — 41.30°N, 107.74°WFort Union — 45.80°N, 109.80°WFort Union — 44.72°N, 108.62°WFort Union — 44.66°N, 108.30°WFort Union — 43.85°N, 108.35°WNacimiento — 35.70°N, 107.00°WNacimiento — 36.57°N, 107.97°WWasatch — 42.37°N, 108.91°WMarshalltown — 40.30°N, 74.30°WTorrejon — 36.51°N, 108.32°WWind River — 43.20°N, 107.10°W

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The named rock units Machaerosaurus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 2 occurrences have no formation on record, which is common for older literature.

Machaerosaurus and its relatives

Paleocene

Where Machaerosaurus and its relatives were recorded in the Paleocene.

Found in the same rock

466 taxa

The Paleobiology Database records 13 sites for Machaerosaurus, 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 13 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 content0

No picture of Machaerosaurus was found. Wikipedia, Wikidata, iDigBio and Smithsonian Open Access were searched and had none.

GBIF was asked, and what came back is not recorded: nothing, or a picture this site could not tie to Machaerosaurus, or no answer at all. This entry cannot say which.

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

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

Keep going

What may have been alongside itAnguidae through timeFormations of the PaleoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Gilmore 1928