Amphitrochus

Amphitrochus

via iDigBio · CC BY-NC-ND · 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
NododelphinulidaePBDB
Diet
grazerPBDB, for Trochoidea
Life habit
epifaunalPBDB, for Trochoidea
Motility
actively mobilePBDB, for Trochoidea
Vision
limitedPBDB, for Gastropoda

Time the record covers

At least 49 million years on record.

The record covers at least 201.4 Mya to 152.21 Mya. No occurrence read is dated outside 205.7 Mya to 149.2 Mya.

Late Triassic — about 1 of 15 occurrencesLate TriassicEarly Jurassic — about 2 of 15 occurrencesEarly JurassicMiddle Jurassic — about 11 of 15 occurrencesMiddle JurassicLate Jurassic — about 2 of 15 occurrencesLate Jurassic207–205 Mya — about 0.2 occurrences205–203 Mya — about 0.5 occurrences203–201 Mya — about 0.4 occurrences193–191 Mya — about 0.2 occurrences191–189 Mya — about 0.2 occurrences189–187 Mya — about 0.2 occurrences187–185 Mya — about 0.2 occurrences185–183 Mya — about 0.1 occurrences181–179 Mya — about 0.2 occurrences179–177 Mya — about 0.3 occurrences177–175 Mya — about 0.3 occurrences175–174 Mya — about 1 occurrence174–172 Mya — about 2 occurrences172–170 Mya — about 2 occurrences170–168 Mya — about 3 occurrences168–166 Mya — about 2 occurrences166–164 Mya — about 0.6 occurrences164–162 Mya — about 0.1 occurrences162–160 Mya — about 0.1 occurrences160–158 Mya — about 0.1 occurrences158–156 Mya — about 0.1 occurrences156–154 Mya — about 0.1 occurrences154–152 Mya — about 0.1 occurrences152–150 Mya — about 0.7 occurrences150–148 Mya — about 0.3 occurrences201.4 Mya152.21 Mya207 Mya148 Mya

15 occurrences of Amphitrochus on record, most of them in the Middle Jurassic. 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

15 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

4 formations

Dhruma — 22.50°N, 46.00°EJurensismergel — 47.95°N, 7.82°EMassenkalk — 48.89°N, 11.94°EAmaltheenton — 49.79°N, 11.04°E

Loading coastlines…

The named rock units Amphitrochus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 11 occurrences have no formation on record, which is common for older literature.

Amphitrochus and its relatives

Middle Jurassic

Where Amphitrochus and its relatives were recorded in the Middle Jurassic.

Found in the same rock

342 taxa

The Paleobiology Database records 14 sites for Amphitrochus, 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

10 references

Each of the 15 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. 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 Amphitrochus

Source
iDigBio
Credit
via iDigBio
Licence
CC BY-NC-ND
Commercial use
the licence does not allow it

No 3D scan of Amphitrochus was found in Sketchfab.

Smithsonian Open Access and MorphoSource were not reached for this taxon, so this list is what the others held rather than everything there is.

This is what the site found, which is not the same as what exists.

Keep going

What may have been alongside itNododelphinulidae through timeFormations of the Middle JurassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Cossmann 1907