Eutrephoceras

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 least 157 million years on record.

The record covers at least 170.9 Mya to 13.82 Mya. No occurrence read is dated outside 180.4 Mya to 11.63 Mya.

Early Jurassic — about 1 of 444 occurrencesMiddle Jurassic — about 20 of 444 occurrencesLate Jurassic — about 3 of 444 occurrencesLate JurassicEarly Cretaceous — about 29 of 444 occurrencesEarly CretaceousLate Cretaceous — about 270 of 444 occurrencesLate CretaceousPaleocene — about 33 of 444 occurrencesEocene — about 78 of 444 occurrencesEoceneOligocene — about 3 of 444 occurrencesMiocene — about 7 of 444 occurrencesMiocene184–178 Mya — about 0.3 occurrences178–172 Mya — about 0.6 occurrences172–166 Mya — about 7 occurrences166–160 Mya — about 13 occurrences160–155 Mya — about 1 occurrence155–149 Mya — about 2 occurrences143–137 Mya — about 0.0 occurrences137–131 Mya — about 2 occurrences131–125 Mya — about 3 occurrences125–119 Mya — about 2 occurrences119–114 Mya — about 3 occurrences114–108 Mya — about 8 occurrences108–102 Mya — about 8 occurrences102–96 Mya — about 13 occurrences96–90 Mya — about 22 occurrences90–84 Mya — about 18 occurrences84–78 Mya — about 30 occurrences78–73 Mya — about 31 occurrences73–67 Mya — about 139 occurrences67–61 Mya — about 36 occurrences61–55 Mya — about 19 occurrences55–49 Mya — about 15 occurrences49–43 Mya — about 20 occurrences43–38 Mya — about 34 occurrences38–32 Mya — about 7 occurrences32–26 Mya — about 2 occurrences26–20 Mya — about 0.5 occurrences20–14 Mya — about 4 occurrences14–8.3 Mya — about 3 occurrences170.9 Mya13.82 Mya184 Mya8 Mya

444 occurrences 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

444 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

115 formations

Prairie Bluff — 34.63°N, 88.84°WPrairie Bluff — 33.90°N, 88.98°WPrairie Bluff — 33.79°N, 88.97°WPrairie Bluff — 33.79°N, 88.91°WPrairie Bluff — 33.72°N, 88.92°WPrairie Bluff — 33.50°N, 88.81°WPrairie Bluff — 33.38°N, 88.74°WPrairie Bluff — 33.15°N, 88.67°WPrairie Bluff — 33.05°N, 88.56°WPrairie Bluff — 32.91°N, 88.51°WPrairie Bluff — 34.48°N, 88.98°WPrairie Bluff — 32.73°N, 88.30°WPrairie Bluff — 32.74°N, 88.36°WPrairie Bluff — 32.66°N, 88.17°WPrairie Bluff — 32.61°N, 88.24°WPrairie Bluff — 32.49°N, 88.10°WPrairie Bluff — 32.43°N, 88.04°WPrairie Bluff — 32.39°N, 87.92°WPrairie Bluff — 32.23°N, 87.50°WPrairie Bluff — 32.14°N, 87.42°WPrairie Bluff — 32.07°N, 87.33°WPrairie Bluff — 32.04°N, 87.26°WPrairie Bluff — 32.08°N, 87.03°WPrairie Bluff — 32.05°N, 86.81°WPrairie Bluff — 32.05°N, 86.81°WPrairie Bluff — 31.97°N, 86.72°WPrairie Bluff — 31.98°N, 86.00°WPrairie Bluff — 31.99°N, 85.92°WCorsicana Marl — 33.51°N, 94.67°WCorsicana Marl — 33.10°N, 95.99°WCorsicana Marl — 32.87°N, 96.20°WCorsicana Marl — 32.85°N, 96.21°WCorsicana Marl — 32.59°N, 96.32°WCorsicana Marl — 32.07°N, 96.46°WCorsicana Marl — 30.37°N, 97.46°WCorsicana Marl — 29.44°N, 98.56°WCorsicana Marl — 29.37°N, 98.78°WLondon Clay — 51.40°N, 0.83°ELondon Clay — 51.73°N, 0.48°ELondon Clay — 51.51°N, 0.24°ELondon Clay — 51.53°N, 0.15°WLondon Clay — 51.46°N, 0.30°WLondon Clay — 51.41°N, 0.91°ELondon Clay — 50.78°N, 0.68°WLondon Clay — 51.51°N, 0.07°WCastle Hayne — 34.64°N, 77.65°WCastle Hayne — 34.37°N, 77.86°WCastle Hayne — 34.23°N, 77.94°WCastle Hayne — 34.27°N, 77.95°WCastle Hayne — 34.66°N, 77.70°WProvidence — 31.92°N, 85.82°WProvidence — 31.89°N, 85.70°WProvidence — 31.95°N, 85.68°WProvidence — 31.92°N, 85.35°WProvidence — 31.84°N, 85.22°WProvidence — 31.73°N, 85.11°WNacatoch Sand — 32.10°N, 96.47°WNacatoch Sand — 32.59°N, 96.31°WLopez de Bertodano — 64.25°S, 56.75°WLopez de Bertodano — 64.17°S, 57.75°WLopez de Bertodano — 63.88°S, 57.60°WSevern — 38.80°N, 77.00°WSevern — 38.89°N, 76.85°WSevern — 38.92°N, 76.85°WSevern — 39.04°N, 76.57°WAhlen — 51.75°N, 8.03°EAhlen — 51.72°N, 8.03°EAhlen — 51.77°N, 8.05°EOkinoshima — 32.87°N, 129.55°EOkinoshima — 32.78°N, 129.83°EOkinoshima — 32.69°N, 129.77°ESardinero — 43.32°N, 3.35°WRierdon — 46.97°N, 109.04°WRierdon — 48.21°N, 109.09°WRierdon — 45.23°N, 108.75°WRierdon — 47.85°N, 108.58°WRierdon — 46.98°N, 109.19°WRierdon — 47.94°N, 108.43°WRierdon — 45.36°N, 108.71°WSantee Limestone — 33.33°N, 80.15°WSantee Limestone — 33.33°N, 79.69°WSantee Limestone — 33.35°N, 80.25°WDhruma — 24.23°N, 46.58°EDhruma — 25.50°N, 45.00°EDhruma — 25.05°N, 45.67°EDhruma — 21.88°N, 45.83°EChiwapa — 34.36°N, 88.92°WChiwapa — 34.18°N, 88.96°WChiwapa — 34.25°N, 88.96°WEscondido — 29.36°N, 99.06°WEscondido — 29.27°N, 99.05°WEscondido — 29.11°N, 99.82°WEscondido — 28.52°N, 100.31°WUpper Lopez de Bertodano — 64.27°S, 56.73°WAitamir — 36.62°N, 60.07°EPierre Shale — 43.27°N, 104.27°WPierre Shale — 40.06°N, 106.39°WKahuitara Tuff — 44.33°S, 176.00°WKahuitara Tuff — 44.24°S, 176.24°WBeer Head Limestone — 51.08°N, 1.18°EBeer Head Limestone — 50.75°N, 2.33°WBeer Head Limestone — 50.83°N, 2.45°WSanta Marta — 63.90°S, 57.85°WPerte du Rhône — 46.83°N, 6.52°EOwl Creek — 34.75°N, 88.93°WOwl Creek — 34.45°N, 89.00°W

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The named rock units Eutrephoceras has been recovered from, largest first. Drawn where the rock is now, not where it formed. 91 further formations hold fewer occurrences each and are not listed. 115 occurrences have no formation on record, which is common for older literature.

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

137 references

Each of the 444 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. 125 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 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