Trematoceras

Trematoceras, from Ancient Greek τρῆμα (trêma), meaning "perforation", and κέρας (kéras), meaning "horn", is an orthoconic nautiloid cephalopod from the Upper Triassic of Europe and Asia named by Eichwald in 1851.

Trematoceras

via iDigBio · 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
TrematoceratidaePBDB
Diet
carnivorePBDB, for Cephalopoda
Life habit
nektonicPBDB, for Cephalopoda
Motility
fast-movingPBDB, for Cephalopoda
Vision
well-developedPBDB, for Cephalopoda
Environment
marinePBDB, for Cephalopoda

Time the record covers

At least 33 million years on record.

The record covers at least 248.6 Mya to 215.38 Mya. No occurrence read is dated outside 250.8 Mya to 211.18 Mya.

Early Triassic — about 33 of 115 occurrencesEarly TriassicMiddle Triassic — about 64 of 115 occurrencesMiddle TriassicLate Triassic — about 18 of 115 occurrencesLate Triassic252–250 Mya — about 4 occurrences250–249 Mya — about 9 occurrences249–247 Mya — about 15 occurrences247–246 Mya — about 9 occurrences246–245 Mya — about 5 occurrences245–243 Mya — about 7 occurrences243–242 Mya — about 27 occurrences242–241 Mya — about 13 occurrences241–239 Mya — about 4 occurrences239–238 Mya — about 3 occurrences238–236 Mya — about 4 occurrences236–235 Mya — about 5 occurrences235–234 Mya — about 5 occurrences234–232 Mya — about 0.9 occurrences232–231 Mya — about 0.5 occurrences231–230 Mya — about 0.5 occurrences230–228 Mya — about 0.5 occurrences228–227 Mya — about 0.4 occurrences227–225 Mya — about 0.2 occurrences225–224 Mya — about 0.2 occurrences224–223 Mya — about 0.2 occurrences223–221 Mya — about 0.2 occurrences221–220 Mya — about 0.2 occurrences220–219 Mya — about 0.2 occurrences219–217 Mya — about 0.2 occurrences217–216 Mya — about 0.2 occurrences216–215 Mya — about 0.3 occurrences215–213 Mya — about 0.3 occurrences213–212 Mya — about 0.3 occurrences212–210 Mya — about 0.1 occurrences248.6 Mya215.38 Mya251.6 Mya210.4 Mya

115 occurrences of Trematoceras on record, most of them in the Middle Triassic. 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

115 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

27 formations

Besano — 45.91°N, 8.95°EPrida — 40.28°N, 118.08°WHalstatt — 47.56°N, 13.63°EHalstatt — 47.67°N, 13.72°EHalstatt — 47.60°N, 13.88°EHalstatt — 46.63°N, 13.68°EHalstatt — 47.59°N, 13.85°EZhitkov — 43.03°N, 131.93°EZhitkov — 42.93°N, 131.92°EZhitkov — 42.93°N, 132.43°EZhitkov — 43.32°N, 132.17°ETartalinskaya — 44.36°N, 51.40°EUlakhan-Krest — 71.81°N, 127.24°EUlakhan-Krest — 71.70°N, 127.80°ECassian — 46.57°N, 11.94°ECassian — 46.51°N, 11.95°EWengen — 46.59°N, 11.74°EWengen — 46.55°N, 11.62°EWengen — 46.59°N, 11.76°EWengen — 46.55°N, 11.87°EKaradzhatykskaya — 44.36°N, 51.40°EPastanakhskaya/Ystannakhskaya — 72.85°N, 120.98°EDunnatető Limestone — 48.48°N, 20.74°EBulog — 43.82°N, 18.44°EBulog — 43.85°N, 18.48°ESchmidt — 43.03°N, 131.93°ESchmidt — 42.93°N, 131.92°EGutenstein — 47.68°N, 14.73°EFukkoshi — 38.60°N, 141.52°EOsawa — 38.71°N, 141.54°EOsawa — 38.69°N, 141.35°EDorgicse — 46.93°N, 17.78°EBac Thuy — 21.85°N, 106.74°EThaynes — 42.12°N, 111.25°WMarmolata — 46.45°N, 11.87°ELatemar — 46.35°N, 11.63°EWetterstein — 47.30°N, 11.37°ERaibl — 46.51°N, 11.58°EHallstatt — 43.84°N, 18.43°E

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The named rock units Trematoceras has been recovered from, largest first. Drawn where the rock is now, not where it formed. 3 further formations hold fewer occurrences each and are not listed. 25 occurrences have no formation on record, which is common for older literature.

Trematoceras and its relatives

Middle Triassic

Where Trematoceras and its relatives were recorded in the Middle Triassic.

Found in the same rock

1,144 taxa

The Paleobiology Database records 107 sites for Trematoceras, 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

36 references

Each of the 115 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. 24 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 content1

Picture of Trematoceras

Source
iDigBio
Credit
via iDigBio
Licence
not stated by the source
Commercial use
cannot be read from the licence given — check the record

No 3D scan of Trematoceras 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 itTrematoceratidae through timeFormations of the Middle TriassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Eichwald 1851