Trachyceras

Trachyceras is a genus of ammonoid cephalopods belonging to the order Ceratitida. The type species is Trachyceras aon, which was first described by Georg zu Münster in 1834 as a species of Ceratites. The genus includes many species found in Afghanistan, Bosnia and Herzegovina, Canada, China, Germany, Hungary, India, Indonesia, Italy, the Russian Federation, Slovenia, and the United States.

Trachyceras

Kent G. Budge · 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
TrachyceratinaePBDB
Diet
carnivorePBDB, for Ceratitida
Life habit
nektonicPBDB, for Ceratitida
Motility
actively mobilePBDB, for Ceratitida
Vision
well-developedPBDB, for Cephalopoda
Environment
marinePBDB, for Cephalopoda

Time the record covers

At least 14 million years on record.

The record covers at least 241.464 Mya to 227.3 Mya. No occurrence read is dated outside 247 Mya to 201.4 Mya.

Early Triassic — about 0 of 165 occurrencesMiddle Triassic — about 41 of 165 occurrencesMiddle TriassicLate Triassic — about 124 of 165 occurrencesLate TriassicEarly Jurassic — about 0 of 165 occurrences248–246 Mya — about 0.7 occurrences246–245 Mya — about 2 occurrences245–243 Mya — about 2 occurrences243–242 Mya — about 2 occurrences242–240 Mya — about 10 occurrences240–238 Mya — about 13 occurrences238–237 Mya — about 17 occurrences237–235 Mya — about 49 occurrences235–234 Mya — about 49 occurrences234–232 Mya — about 7 occurrences232–231 Mya — about 4 occurrences231–229 Mya — about 4 occurrences229–227 Mya — about 4 occurrences227–226 Mya — about 0.3 occurrences226–224 Mya — about 0.2 occurrences224–223 Mya — about 0.2 occurrences223–221 Mya — about 0.2 occurrences221–219 Mya — about 0.2 occurrences219–218 Mya — about 0.2 occurrences218–216 Mya — about 0.2 occurrences216–215 Mya — about 0.1 occurrences215–213 Mya — about 0.0 occurrences213–212 Mya — about 0.0 occurrences212–210 Mya — about 0.0 occurrences210–208 Mya — about 0.0 occurrences208–207 Mya — about 0.0 occurrences207–205 Mya — about 0.0 occurrences205–204 Mya — about 0.0 occurrences204–202 Mya — about 0.0 occurrences202–200 Mya — about 0.0 occurrences241.464 Mya227.3 Mya247.9 Mya200.5 Mya

165 occurrences of Trachyceras on record, most of them in the Late 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

165 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

23 formations

San Cassian — 46.51°N, 11.86°ESan Cassian — 46.64°N, 11.84°ECassian — 46.55°N, 11.93°ECassian — 46.57°N, 11.94°ECassian — 46.51°N, 11.95°ECassian — 46.51°N, 11.76°ESan Cassiano — 46.53°N, 11.42°ELiard — 55.64°N, 122.84°WLiard — 55.67°N, 122.92°WMuschelkalk — 45.94°N, 10.63°EXiaowa — 25.90°N, 105.42°EFalang — 25.16°N, 104.79°EFalang — 25.70°N, 105.61°EMarmolata — 46.43°N, 11.82°EMarmolata — 46.45°N, 11.87°EBreno — 45.95°N, 10.05°EWengen — 46.55°N, 11.87°EWengen — 45.95°N, 10.62°EAugusta Mountain — 39.61°N, 117.50°WNatchez Pass — 40.21°N, 118.11°WNatchez Pass — 40.76°N, 117.85°WRaibl — 47.33°N, 11.46°EHallstatt — 43.84°N, 18.43°EEsino — 45.98°N, 9.36°EHalstatt — 47.60°N, 13.88°EKapp Toscana — 74.42°N, 19.16°EPratotondo Limestone — 45.97°N, 10.22°ECsövar — 47.82°N, 19.30°ELudington — 59.08°N, 125.40°WKorosica — 46.44°N, 14.26°ECephalopod Limestone — 10.30°S, 123.71°ERaibl — 45.79°N, 10.10°E

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The named rock units Trachyceras has been recovered from, largest first. Drawn where the rock is now, not where it formed. 39 occurrences have no formation on record, which is common for older literature.

Trachyceras and its relatives

Late Triassic

Where Trachyceras and its relatives were recorded in the Late Triassic.

Found in the same rock

1,201 taxa

The Paleobiology Database records 101 sites for Trachyceras, 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

33 references

Each of the 165 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. 21 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 Trachyceras

Credit
Kent G. Budge
Licence
CC BY-SA 4.0
Commercial use
the licence allows it

3D model

Source
Sketchfab
Licence
CC Attribution-NonCommercial-ShareAlike
Commercial use
the licence does not allow 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 itTrachyceratinae through timeFormations of the Late TriassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Laube 1869)