Placenticeras bidorsatum

Placenticeras bidorsatum

via iDigBio · CC BY · via iDigBio. 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
PlacenticerasPBDB
Diet
carnivorePBDB, for Ammonoidea
Life habit
nektonicPBDB, for Ammonoidea
Motility
fast-movingPBDB, for Ammonoidea
Vision
well-developedPBDB, for Cephalopoda
Environment
marinePBDB, for Cephalopoda

Time the record covers

At most 12 million years on record.

Every occurrence read is dated to somewhere between 83.6 Mya and 72.2 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Late Cretaceous — about 14 of 14 occurrencesLate Cretaceous84–83 Mya — about 0.4 occurrences83–83 Mya — about 0.5 occurrences83–82 Mya — about 0.5 occurrences82–82 Mya — about 0.5 occurrences82–82 Mya — about 0.5 occurrences82–81 Mya — about 0.5 occurrences81–81 Mya — about 0.5 occurrences81–80 Mya — about 0.5 occurrences80–80 Mya — about 0.5 occurrences80–80 Mya — about 0.5 occurrences80–79 Mya — about 0.5 occurrences79–79 Mya — about 0.5 occurrences79–78 Mya — about 0.5 occurrences78–78 Mya — about 0.5 occurrences78–77 Mya — about 0.5 occurrences77–77 Mya — about 0.5 occurrences77–77 Mya — about 0.5 occurrences77–76 Mya — about 0.5 occurrences76–76 Mya — about 0.5 occurrences76–75 Mya — about 0.5 occurrences75–75 Mya — about 0.5 occurrences75–75 Mya — about 0.5 occurrences75–74 Mya — about 0.5 occurrences74–74 Mya — about 0.5 occurrences74–73 Mya — about 0.5 occurrences73–73 Mya — about 0.5 occurrences73–73 Mya — about 0.5 occurrences73–72 Mya — about 0.4 occurrences84.1 Mya71.7 Mya

14 occurrences of Placenticeras bidorsatum on record, most of them in the Late Cretaceous. 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

14 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

1 formation

Dülmener Schichten — 51.85°N, 7.25°E

Loading coastlines…

The named rock units Placenticeras bidorsatum has been recovered from, largest first. Drawn where the rock is now, not where it formed. 13 occurrences have no formation on record, which is common for older literature.

Placenticeras bidorsatum and its relatives

Late Cretaceous

Where Placenticeras bidorsatum and its relatives were recorded in the Late Cretaceous.

Found in the same rock

12 taxa

The Paleobiology Database records 14 sites for Placenticeras bidorsatum, and this reads all of them. The number is how many of those sites it was catalogued from too.

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

2 references

Each of the 14 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 content1

Picture of Placenticeras bidorsatum

Source
iDigBio
Credit
via iDigBio
Licence
CC BY
Commercial use
the licence allows it

No 3D scan of Placenticeras bidorsatum 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.

This is what the site found, which is not the same as what exists.

Keep going

What may have been alongside itPlacenticeras through timeFormations of the Late CretaceousThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Roemer 1841)