Chriacus

Chriacus is an extinct genus of placental mammals that lived in what is now North America during the Paleocene and early Eocene epochs. In life, members of the genus may have looked and lived in ways similar to coatimundis, though they were not closely related to any living mammal. Like many early Cenozoic mammals, its relationships are uncertain, with possible affinities to ungulates or Ferae. Chriacus and similar Paleocene-Eocene mammals are generally known as arctocyonids, though it is unclear whether different arctocyonids are actually related to each other.

Chriacus

ДиБгд · CC BY 4.0 · via Wikipedia/Commons. 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
ArctocyonidaePBDB
Diet
omnivorePBDB
Life habit
scansorialPBDB
Motility
actively mobilePBDB, for Osteichthyes
Environment
terrestrialPBDB, for Eutheria

Time the record covers

At least 7.4 million years on record.

The record covers at least 63.4 Mya to 56 Mya. No occurrence read is dated outside 66 Mya to 48.07 Mya.

Late Cretaceous — about 0 of 166 occurrencesPaleocene — about 113 of 166 occurrencesPaleoceneEocene — about 53 of 166 occurrencesEocene67–66 Mya — about 0.1 occurrences66–65 Mya — about 0.2 occurrences65–65 Mya — about 0.2 occurrences65–64 Mya — about 0.2 occurrences64–63 Mya — about 2 occurrences63–63 Mya — about 17 occurrences63–62 Mya — about 17 occurrences62–61 Mya — about 17 occurrences61–61 Mya — about 16 occurrences61–60 Mya — about 6 occurrences60–60 Mya — about 6 occurrences60–59 Mya — about 6 occurrences59–58 Mya — about 6 occurrences58–58 Mya — about 6 occurrences58–57 Mya — about 6 occurrences57–56 Mya — about 5 occurrences56–56 Mya — about 6 occurrences56–55 Mya — about 6 occurrences55–55 Mya — about 6 occurrences55–54 Mya — about 6 occurrences54–53 Mya — about 6 occurrences53–53 Mya — about 6 occurrences53–52 Mya — about 6 occurrences52–51 Mya — about 6 occurrences51–51 Mya — about 3 occurrences51–50 Mya — about 1 occurrence50–49 Mya — about 1 occurrence49–49 Mya — about 1 occurrence49–48 Mya — about 1 occurrence48–48 Mya — about 0.2 occurrences63.4 Mya56 Mya66.5 Mya47.6 Mya

166 occurrences of Chriacus 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

166 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

21 formations

Willwood — 44.50°N, 108.00°WWillwood — 44.00°N, 108.00°WWillwood — 44.30°N, 109.00°WWillwood — 43.95°N, 107.57°WWillwood — 44.59°N, 108.86°WWillwood — 44.50°N, 108.67°WWillwood — 44.37°N, 108.67°WWillwood — 44.16°N, 107.87°WWillwood — 44.15°N, 107.86°WNacimiento — 35.70°N, 107.00°WNacimiento — 36.30°N, 108.20°WNacimiento — 36.57°N, 107.97°WNacimiento — 36.18°N, 107.58°WNacimiento — 36.27°N, 107.76°WFort Union — 41.30°N, 107.74°WFort Union — 43.85°N, 108.35°WFort Union — 45.80°N, 109.80°WFort Union — 47.80°N, 106.10°WFort Union — 41.70°N, 109.00°WFort Union — 44.72°N, 108.38°WFort Union — 45.20°N, 109.00°WFort Union — 43.20°N, 107.10°WFort Union — 45.10°N, 106.90°WFort Union — 43.45°N, 109.16°WFort Union — 41.92°N, 108.56°WFort Union — 44.30°N, 109.00°WFort Union — 44.72°N, 108.62°WFort Union — 44.86°N, 108.89°WFort Union — 44.85°N, 108.89°W"Fort Union" (= Lebo) — 46.20°N, 109.90°W"Fort Union" (= Lebo) — 45.80°N, 109.80°WWasatch — 41.80°N, 110.70°WWasatch — 40.60°N, 108.10°WWasatch — 41.70°N, 109.00°WNorth Horn — 39.18°N, 111.27°WNorth Horn — 39.10°N, 111.80°WNorth Horn — 39.00°N, 111.00°WPaskapoo — 51.18°N, 114.43°WPaskapoo — 52.40°N, 116.10°WPaskapoo — 52.35°N, 113.77°WPaskapoo — 51.00°N, 114.10°WPaskapoo — 53.23°N, 114.70°WEvanston — 41.58°N, 110.68°WDeBeque — 39.20°N, 108.20°WDeBeque — 39.70°N, 107.60°WHanna — 41.80°N, 107.00°WBlack Peaks — 29.20°N, 103.20°WBlack Peaks — 29.46°N, 103.15°WSan Jose — 35.70°N, 107.00°W"Wasatch" — 44.00°N, 106.60°WPorcupine Hills — 51.10°N, 114.28°WTullock — 47.80°N, 106.10°WHoback — 42.70°N, 110.10°WRavenscrag — 49.06°N, 102.75°WMelville — 45.80°N, 109.80°WLower Variegated Sequence — 43.90°N, 110.80°WIndian Meadows — 43.20°N, 108.20°WOhio Creek — 40.28°N, 108.30°W

Loading coastlines…

The named rock units Chriacus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 14 occurrences have no formation on record, which is common for older literature.

Chriacus and its relatives

Paleocene

Where Chriacus and its relatives were recorded in the Paleocene.

Found in the same rock

835 taxa

The Paleobiology Database records 132 sites for Chriacus, 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

44 references

Each of the 166 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. 32 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 Chriacus

Credit
ДиБгд
Licence
CC BY 4.0
Commercial use
the licence allows it

CT scan

Licence
In Copyright
Commercial use
cannot be read from the licence given — check the record
Specimen
Chriacus Chriacus punitor · uwbm:vp:98258

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 itArctocyonidae through timeFormations of the PaleoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Cope 1883