Eutrephoceras

Searched as Eutrephoceras sphaericum geinitzi. The Paleobiology Database treats Eutrephoceras as the accepted name.

Eutrephoceras is an extinct genus of nautilus from the Late Jurassic to the Miocene. They are characterized by a highly rounded involute shell with slightly sinuous suture patterns.

Eutrephoceras

James St. John · CC BY 2.0 · 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
NautilidaePBDB
Diet
carnivorePBDB, for Nautilidae
Life habit
nektonicPBDB, for Nautilidae
Motility
actively mobilePBDB, for Nautilidae
Vision
well-developedPBDB, for Cephalopoda
Environment
marinePBDB, for Cephalopoda

Time the record covers

At most 2.1 million years on record.

The one occurrence read is dated to somewhere between 85.7 Mya and 83.6 Mya, which is a dating window rather than a span.

Late Cretaceous — about 1 of 1 occurrenceLate Cretaceous86–86 Mya — about 0.0 occurrences86–86 Mya — about 0.0 occurrences86–85 Mya — about 0.0 occurrences85–85 Mya — about 0.0 occurrences85–85 Mya — about 0.0 occurrences85–85 Mya — about 0.0 occurrences85–85 Mya — about 0.0 occurrences85–85 Mya — about 0.0 occurrences85–85 Mya — about 0.0 occurrences85–85 Mya — about 0.0 occurrences85–85 Mya — about 0.0 occurrences85–85 Mya — about 0.0 occurrences85–84 Mya — about 0.0 occurrences84–84 Mya — about 0.0 occurrences84–84 Mya — about 0.0 occurrences84–84 Mya — about 0.0 occurrences84–84 Mya — about 0.0 occurrences84–84 Mya — about 0.0 occurrences84–84 Mya — about 0.0 occurrences84–84 Mya — about 0.0 occurrences84–84 Mya — about 0.0 occurrences84–84 Mya — about 0.0 occurrences86.2 Mya83.1 Mya

1 occurrence of Eutrephoceras 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

1 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

Mzamba — 30.75°S, 30.62°E

Loading coastlines…

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

Eutrephoceras and its relatives

Late Cretaceous

Where Eutrephoceras and its relatives were recorded in the Late Cretaceous.

Found in the same rock

2,238 taxa

The Paleobiology Database records 411 sites for Eutrephoceras, and this reads 240 of them. Of that, one read hit the database's own return limit, so every count below is a floor rather than a total. 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

1 reference

Each of the 1 occurrence 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 content3

Picture of Eutrephoceras

Credit
James St. John
Licence
CC BY 2.0
Commercial use
the licence allows it

Laser scan

Licence
not stated by the source
Commercial use
cannot be read from the licence given — check the record
Specimen
Eutrephoceras dekayi · YPM:IP:YPM IP 201196

3D model

Source
Sketchfab
Licence
CC0 Public Domain
Commercial use
the licence allows it

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 itNautilidae through timeFormations of the Late CretaceousThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Hyatt 1894