Inversoceras

Inversoceras is a genus of cephalopods in the order Oncocerida and the family Trimeroceratidae. These mollusks were fast-moving nektobenthic carnivores. They lived in the Silurian period, from the Lower Wenlock age to the Ludlow age.

Inversoceras

Hectonichus · 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
TrimeroceratidaePBDB
Diet
carnivorePBDB, for Oncocerida
Life habit
nektobenthicPBDB, for Oncocerida
Motility
fast-movingPBDB, for Cephalopoda
Vision
well-developedPBDB, for Cephalopoda
Environment
marinePBDB, for Cephalopoda

Time the record covers

At least 1.7 million years on record.

The record covers at least 426.7 Mya to 425 Mya. No occurrence read is dated outside 443.1 Mya to 422.7 Mya.

Ordovician — about 0 of 3 occurrencesSilurian — about 3 of 3 occurrencesSilurian444–443 Mya — about 0.0 occurrences443–442 Mya — about 0.0 occurrences442–441 Mya — about 0.0 occurrences441–441 Mya — about 0.0 occurrences441–440 Mya — about 0.0 occurrences440–439 Mya — about 0.0 occurrences439–439 Mya — about 0.0 occurrences439–438 Mya — about 0.0 occurrences438–437 Mya — about 0.0 occurrences437–436 Mya — about 0.0 occurrences436–436 Mya — about 0.0 occurrences436–435 Mya — about 0.0 occurrences435–434 Mya — about 0.0 occurrences434–434 Mya — about 0.0 occurrences434–433 Mya — about 0.0 occurrences433–432 Mya — about 0.0 occurrences432–431 Mya — about 0.0 occurrences431–431 Mya — about 0.0 occurrences431–430 Mya — about 0.0 occurrences430–429 Mya — about 0.0 occurrences429–429 Mya — about 0.0 occurrences429–428 Mya — about 0.0 occurrences428–427 Mya — about 0.0 occurrences427–426 Mya — about 0.1 occurrences426–426 Mya — about 0.2 occurrences426–425 Mya — about 0.2 occurrences425–424 Mya — about 0.5 occurrences424–424 Mya — about 0.5 occurrences424–423 Mya — about 0.5 occurrences423–422 Mya — about 0.1 occurrences426.7 Mya – 425 Mya443.6 Mya422.2 Mya

3 occurrences of Inversoceras on record, most of them in the Silurian. 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

3 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

2 formations

Hemse Beds — 57.53°N, 18.43°EHemse Beds — 57.31°N, 18.37°ERacine — 43.05°N, 88.01°W

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

Inversoceras and its relatives

Silurian

Where Inversoceras and its relatives were recorded in the Silurian.

Found in the same rock

124 taxa

The Paleobiology Database records 3 sites for Inversoceras, 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

2 references

Each of the 3 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 doi.org. Relayed as the Paleobiology Database holds them, not checked against what they resolve to.

Media and terms

Media content1

Picture of Inversoceras

Credit
Hectonichus
Licence
CC BY-SA 4.0
Commercial use
the licence allows it

No 3D scan of Inversoceras 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 itTrimeroceratidae through timeFormations of the SilurianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Hedström 1917