Hoeloceras

Hoeloceras is an extinct orthoconic nautiloid cephalopod from the upper Ordovician, generally included in the Actinocerida. Nautiloids are a subclass of shelled cephalopods that were once diverse and numerous but are now represented by only a couple of genera, Nautilus and Allonautilus.

Hoeloceras

Kröger, Björn · CC BY-NC 4.0 · via GBIF. 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
GonioceratidaePBDB
Diet
carnivorePBDB, for Actinocerida
Life habit
nektobenthicPBDB, for Actinocerida
Motility
actively mobilePBDB, for Actinocerida
Vision
well-developedPBDB, for Cephalopoda
Environment
marinePBDB, for Cephalopoda

Time the record covers

At least 7.5 million years on record.

The record covers at least 461.4 Mya to 453.9 Mya. No occurrence read is dated outside 464.3 Mya to 451.8 Mya.

Ordovician — about 6 of 6 occurrencesOrdovician464–464 Mya — about 0.1 occurrences464–463 Mya — about 0.2 occurrences463–463 Mya — about 0.2 occurrences463–463 Mya — about 0.2 occurrences463–462 Mya — about 0.2 occurrences462–462 Mya — about 0.2 occurrences462–461 Mya — about 0.1 occurrences459–458 Mya — about 0.0 occurrences458–458 Mya — about 0.1 occurrences458–457 Mya — about 0.1 occurrences457–457 Mya — about 0.1 occurrences457–456 Mya — about 0.1 occurrences456–456 Mya — about 0.1 occurrences456–455 Mya — about 0.1 occurrences455–455 Mya — about 0.1 occurrences455–454 Mya — about 0.1 occurrences454–454 Mya — about 0.1 occurrences454–454 Mya — about 0.8 occurrences454–453 Mya — about 1 occurrence453–453 Mya — about 0.9 occurrences453–452 Mya — about 0.6 occurrences452–452 Mya — about 0.6 occurrences461.4 Mya453.9 Mya464.8 Mya451.3 Mya

6 occurrences of Hoeloceras on record, most of them in the Ordovician. 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

6 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

4 formations

Frognerkilen — 60.00°N, 11.00°EFrognerkilen — 59.94°N, 10.88°EKullsberg — 61.05°N, 15.20°EKullsberg — 60.92°N, 15.10°EElnes — 60.00°N, 11.17°EVasalemma — 59.23°N, 24.23°E

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The named rock units Hoeloceras has been recovered from, largest first. Drawn where the rock is now, not where it formed.

Hoeloceras and its relatives

Ordovician

Where Hoeloceras and its relatives were recorded in the Ordovician.

Found in the same rock

165 taxa

The Paleobiology Database records 6 sites for Hoeloceras, 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 6 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 content1

Picture of Hoeloceras

Source
GBIF
Credit
Kröger, Björn
Licence
CC BY-NC 4.0
Commercial use
the licence does not allow it

No 3D scan of Hoeloceras 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 itGonioceratidae through timeFormations of the OrdovicianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Sweet 1958