Ancistroceras

Ancistroceras is one of the two ancestral lituitids from the late Early Ordovician (Arenigian). The other being Holmiceras.

Ancistroceras

H. Zell · CC BY-SA 3.0 · 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
LituitidaePBDB
Diet
carnivorePBDB, for Lituitida
Life habit
nektonicPBDB, for Lituitida
Motility
fast-movingPBDB, for Cephalopoda
Vision
well-developedPBDB, for Cephalopoda
Environment
marinePBDB, for Cephalopoda

Time the record covers

At least 3.4 million years on record.

The record covers at least 461.4 Mya to 458 Mya. No occurrence read is dated outside 468 Mya to 449.5 Mya.

Ordovician — about 16 of 16 occurrencesOrdovician469–468 Mya — about 0.0 occurrences468–467 Mya — about 0.2 occurrences467–467 Mya — about 0.2 occurrences467–466 Mya — about 0.2 occurrences466–465 Mya — about 0.2 occurrences465–465 Mya — about 0.2 occurrences465–464 Mya — about 0.3 occurrences464–463 Mya — about 0.4 occurrences463–463 Mya — about 0.4 occurrences463–462 Mya — about 0.4 occurrences462–461 Mya — about 0.4 occurrences461–461 Mya — about 1 occurrence461–460 Mya — about 2 occurrences460–459 Mya — about 2 occurrences459–459 Mya — about 2 occurrences459–458 Mya — about 2 occurrences458–457 Mya — about 2 occurrences457–457 Mya — about 2 occurrences457–456 Mya — about 0.2 occurrences456–456 Mya — about 0.2 occurrences456–455 Mya — about 0.2 occurrences455–454 Mya — about 0.2 occurrences454–454 Mya — about 0.1 occurrences454–453 Mya — about 0.1 occurrences453–452 Mya — about 0.1 occurrences452–452 Mya — about 0.1 occurrences452–451 Mya — about 0.1 occurrences451–450 Mya — about 0.1 occurrences450–450 Mya — about 0.1 occurrences450–449 Mya — about 0.0 occurrences461.4 Mya458 Mya468.5 Mya449 Mya

16 occurrences of Ancistroceras 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

16 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

10 formations

Vollen — 60.00°N, 11.00°EVollen — 59.87°N, 10.56°EVollen — 59.90°N, 10.67°EGuniutan — 33.00°N, 111.00°EGuniutan — 32.00°N, 119.00°EPersnas — 57.00°N, 17.00°EFolkeslunda — 57.00°N, 17.00°EGullhogen Mudstone — 58.00°N, 14.00°ERyd Limestone — 58.00°N, 14.00°ESegerstad Limestone — 61.00°N, 15.00°EBaota — 33.00°N, 111.00°ESaerGanTag — 41.00°N, 79.00°EElnes — 60.00°N, 11.17°E

Loading coastlines…

The named rock units Ancistroceras has been recovered from, largest first. Drawn where the rock is now, not where it formed. 1 occurrence has no formation on record, which is common for older literature.

Ancistroceras and its relatives

Ordovician

Where Ancistroceras and its relatives were recorded in the Ordovician.

Found in the same rock

182 taxa

The Paleobiology Database records 16 sites for Ancistroceras, 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

8 references

Each of the 16 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 the Paleobiology Database's own record for the work.

Media and terms

Media content2

Picture of Ancistroceras

Credit
H. Zell
Licence
CC BY-SA 3.0
Commercial use
the licence allows it

3D model

Source
Sketchfab
Licence
CC Attribution-NonCommercial-ShareAlike
Commercial use
the licence does not allow it

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 itLituitidae through timeFormations of the OrdovicianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Remele 1881