Mcdonaldocnus

Mcdonaldocnus is an extinct genus of nothrotheriid ground sloths that lived during the Middle Miocene and Early Pliocene of what is now Bolivia and Argentina. It was originally placed in the genus Xyophorus but was subsequently recognized as a distinct genus by Gaudin and colleagues in 2022. The authors reassigned the material of "Xyophorus" bondesioi, Xyophorus villarroeli and Xyophorus sp. to Mcdonaldocnus. Fossils of Mcdonaldocnus have been found in the Cerro Azul Formation of Argentina.

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

On record

Recorded, not inferred
Sits inside
NothrotheriidaePBDB
Diet
omnivorePBDB, for Xenarthra
Life habit
ground dwellingPBDB, for Xenarthra
Motility
actively mobilePBDB, for Osteichthyes
Environment
terrestrialPBDB, for Eutheria

Time the record covers

At least 6.5 million years on record.

The record covers at least 13.82 Mya to 7.246 Mya. No occurrence read is dated outside 20.45 Mya to 3.6 Mya.

Miocene — about 8 of 9 occurrencesMiocenePliocene — about 1 of 9 occurrencesPliocene21–20 Mya — about 0.0 occurrences20–20 Mya — about 0.1 occurrences20–19 Mya — about 0.1 occurrences19–19 Mya — about 0.1 occurrences19–18 Mya — about 0.1 occurrences18–17 Mya — about 0.1 occurrences17–17 Mya — about 0.1 occurrences17–16 Mya — about 0.1 occurrences16–16 Mya — about 0.3 occurrences16–15 Mya — about 0.4 occurrences15–14 Mya — about 0.4 occurrences14–14 Mya — about 0.4 occurrences14–13 Mya — about 0.1 occurrences13–13 Mya — about 0.1 occurrences13–12 Mya — about 0.1 occurrences12–11 Mya — about 0.2 occurrences11–11 Mya — about 0.4 occurrences11–10 Mya — about 0.4 occurrences10–9.6 Mya — about 0.5 occurrences9.6–9.1 Mya — about 0.7 occurrences9.1–8.5 Mya — about 0.7 occurrences8.5–7.9 Mya — about 0.7 occurrences7.9–7.3 Mya — about 0.8 occurrences7.3–6.7 Mya — about 0.6 occurrences6.7–6.1 Mya — about 0.6 occurrences6.1–5.5 Mya — about 0.6 occurrences5.5–4.9 Mya — about 0.5 occurrences4.9–4.3 Mya — about 0.2 occurrences4.3–3.7 Mya — about 0.2 occurrences3.7–3.1 Mya — about 0.0 occurrences13.82 Mya7.246 Mya20.9 Mya3.1 Mya

9 occurrences of Mcdonaldocnus 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

9 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

5 formations

Cerro Azul — 36.25°S, 65.51°WCerro Azul — 36.84°S, 65.28°WCerro Azul — 37.14°S, 65.77°WMauri — 17.20°S, 69.00°WToro Negro — 28.69°S, 68.31°WCollón Curá — 42.58°S, 70.33°WArroyo Chasicó — 38.61°S, 62.98°W

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The named rock units Mcdonaldocnus 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.

Mcdonaldocnus and its relatives

Miocene

Where Mcdonaldocnus and its relatives were recorded in the Miocene.

Found in the same rock

100 taxa

The Paleobiology Database records 8 sites for Mcdonaldocnus, 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

4 references

Each of the 9 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. Each entry links to doi.org. Relayed as the Paleobiology Database holds them, not checked against what they resolve to.

Media and terms

Media content0

No picture of Mcdonaldocnus was found. Wikipedia, Wikidata and iDigBio were searched and had none.

Smithsonian Open Access did not answer, so this is what the others held rather than everything there is.

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

No 3D scan of Mcdonaldocnus 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 itNothrotheriidae through timeFormations of the MioceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Gaudin et al. 2022