Placenticeras placenta

Placenticeras placenta

via iDigBio · CC0 · 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 28 of 28 occurrencesLate Cretaceous84–83 Mya — about 0.8 occurrences83–83 Mya — about 1 occurrence83–82 Mya — about 1 occurrence82–82 Mya — about 1 occurrence82–82 Mya — about 1 occurrence82–81 Mya — about 1 occurrence81–81 Mya — about 1 occurrence81–80 Mya — about 1 occurrence80–80 Mya — about 1 occurrence80–80 Mya — about 1 occurrence80–79 Mya — about 1 occurrence79–79 Mya — about 1 occurrence79–78 Mya — about 1 occurrence78–78 Mya — about 1 occurrence78–77 Mya — about 1 occurrence77–77 Mya — about 1 occurrence77–77 Mya — about 1 occurrence77–76 Mya — about 1 occurrence76–76 Mya — about 1 occurrence76–75 Mya — about 1 occurrence75–75 Mya — about 1 occurrence75–75 Mya — about 1 occurrence75–74 Mya — about 1 occurrence74–74 Mya — about 1 occurrence74–73 Mya — about 1 occurrence73–73 Mya — about 1 occurrence73–73 Mya — about 1 occurrence73–72 Mya — about 0.8 occurrences84.1 Mya71.7 Mya

28 occurrences of Placenticeras placenta 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

28 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

8 formations

Merchantville — 39.54°N, 75.72°WMerchantville — 39.55°N, 75.65°WMerchantville — 39.46°N, 75.87°WMerchantville — 40.11°N, 74.74°WMerchantville — 40.44°N, 74.24°WMerchantville — 39.95°N, 74.99°WCoffee Sand — 34.56°N, 88.45°WCoffee Sand — 34.66°N, 88.57°WCoffee Sand — 34.67°N, 88.44°WCoffee Sand — 34.43°N, 88.42°WWoodbury — 39.91°N, 75.03°WWoodbury — 40.45°N, 74.17°WBlack Creek — 35.46°N, 77.68°WBlack Creek — 35.67°N, 77.47°WMarshalltown — 39.78°N, 75.44°WMount Laurel Sand — 39.79°N, 75.63°WGober Chalk — 33.56°N, 95.72°WWenonah — 40.37°N, 74.17°W

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The named rock units Placenticeras placenta 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.

Placenticeras placenta and its relatives

Late Cretaceous

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

Found in the same rock

284 taxa

The Paleobiology Database records 26 sites for Placenticeras placenta, 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

14 references

Each of the 28 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. 2 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 Placenticeras placenta

Source
iDigBio
Credit
via iDigBio
Licence
CC0
Commercial use
the licence allows it

3D model

Source
Sketchfab
Licence
CC Attribution
Commercial use
cannot be read from the licence given — check the record

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. (DeKay 1828)