Arctoceras

Arctoceras is a genus of ceratitid ammonoids from the Lower Triassic with a moderately narrow discoidal shell and ceratitic suture.

Arctoceras

Kent G. Budge · CC BY-SA 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
ArctoceratidaePBDB
Diet
carnivorePBDB, for Ceratitida
Life habit
nektonicPBDB, for Ceratitida
Motility
actively mobilePBDB, for Ceratitida
Vision
well-developedPBDB, for Cephalopoda
Environment
marinePBDB, for Cephalopoda

Time the record covers

At least 3.8 million years on record.

The record covers at least 250.8 Mya to 247 Mya. No occurrence read is dated outside 251.1 Mya to 244.4 Mya.

Early Triassic — about 172 of 174 occurrencesEarly TriassicMiddle Triassic — about 2 of 174 occurrencesMiddle Triassic251–251 Mya — about 0.0 occurrences251–251 Mya — about 0.9 occurrences251–251 Mya — about 14 occurrences251–250 Mya — about 16 occurrences250–250 Mya — about 16 occurrences250–250 Mya — about 16 occurrences250–250 Mya — about 16 occurrences250–249 Mya — about 16 occurrences249–249 Mya — about 16 occurrences249–249 Mya — about 16 occurrences249–249 Mya — about 13 occurrences249–248 Mya — about 6 occurrences248–248 Mya — about 6 occurrences248–248 Mya — about 6 occurrences248–247 Mya — about 6 occurrences247–247 Mya — about 6 occurrences247–247 Mya — about 5 occurrences247–247 Mya — about 0.2 occurrences247–246 Mya — about 0.2 occurrences246–246 Mya — about 0.2 occurrences246–246 Mya — about 0.2 occurrences246–246 Mya — about 0.2 occurrences246–245 Mya — about 0.2 occurrences245–245 Mya — about 0.2 occurrences245–245 Mya — about 0.2 occurrences245–245 Mya — about 0.2 occurrences245–244 Mya — about 0.2 occurrences244–244 Mya — about 0.0 occurrences250.8 Mya247 Mya251.6 Mya243.9 Mya

174 occurrences of Arctoceras on record, most of them in the Early Triassic. 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

174 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

Vikinghogda — 78.58°N, 15.29°EVikinghogda — 78.33°N, 16.48°EVikinghogda — 78.26°N, 16.91°EVikinghogda — 78.53°N, 15.31°EVikinghogda — 78.59°N, 14.44°EVikinghogda — 78.34°N, 16.41°EVikinghogda — 78.48°N, 15.56°EVikinghogda — 78.29°N, 16.56°EZhitkov — 43.30°N, 132.45°EZhitkov — 42.92°N, 132.30°EZhitkov — 42.93°N, 132.42°EZhitkov — 43.32°N, 132.17°EVikinghøgda — 78.28°N, 17.71°EVikinghøgda — 78.24°N, 17.84°ETobizin — 43.05°N, 131.92°ETobizin — 42.92°N, 131.90°ETobizin — 43.17°N, 132.00°EThaynes — 41.53°N, 114.13°WThaynes — 41.54°N, 114.17°WThaynes — 41.55°N, 114.14°WThaynes — 39.41°N, 113.69°WThaynes — 38.67°N, 112.52°WThaynes — 38.23°N, 112.89°WBlind Fiord — 80.64°N, 87.62°WBlind Fiord — 81.07°N, 88.80°WBlind Fiord — 81.05°N, 90.10°WBlind Fiord — 80.83°N, 90.67°WBlind Fiord — 81.38°N, 93.50°WBlind Fiord — 80.85°N, 89.22°WBlind Fiord — 80.64°N, 95.40°WBlind Fiord — 80.52°N, 94.49°WBlind Fiord — 81.21°N, 92.01°WBlind Fiord — 80.64°N, 87.45°WKongressfjellet — 78.53°N, 21.96°EKongressfjellet — 78.24°N, 17.21°EUnion Wash — 36.70°N, 118.03°WLazurnaya — 43.05°N, 131.92°ELazurnaya — 42.93°N, 132.42°ETraveston — 26.25°S, 152.72°EKockatea Shale — 28.35°S, 114.62°EYatyrgvarta — 43.85°N, 40.62°EToad — 56.49°N, 123.17°WTvillingodden — 78.10°N, 13.87°EKamenushka — 43.59°N, 132.17°EGua Musang — 4.92°N, 102.00°ESchmidt — 43.05°N, 131.92°EGrayling — 55.67°N, 122.92°WLuolou — 24.65°N, 106.83°ESulphur Mountain — 53.15°N, 117.68°WVikinghøgda — 78.29°N, 17.80°E

Loading coastlines…

The named rock units Arctoceras has been recovered from, largest first. Drawn where the rock is now, not where it formed. 25 occurrences have no formation on record, which is common for older literature.

Arctoceras and its relatives

Early Triassic

Where Arctoceras and its relatives were recorded in the Early Triassic.

Found in the same rock

295 taxa

The Paleobiology Database records 135 sites for Arctoceras, 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

37 references

Each of the 174 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. 25 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 Arctoceras

Credit
Kent G. Budge
Licence
CC BY-SA 4.0
Commercial use
the licence allows it

No 3D scan of Arctoceras was found in MorphoSource and Sketchfab.

Smithsonian Open Access was 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 itArctoceratidae through timeFormations of the Early TriassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Hyatt 1900