Pachyrisma

Pachyrisma

V. Logelin · CC0 · via GBIF. 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
MegalodontidaePBDB
Diet
suspension feederPBDB, for Megalodontidae
Life habit
semi-infaunalPBDB, for Megalodontidae
Motility
stationaryPBDB, for Megalodontidae
Vision
blindPBDB, for Megalodontidae

Time the record covers

At least 94 million years on record.

The record covers at least 243.43 Mya to 149.2 Mya. No occurrence read is dated outside 247 Mya to 145.06 Mya.

Early Triassic — about 0 of 30 occurrencesMiddle Triassic — about 6 of 30 occurrencesMiddle TriassicLate Triassic — about 11 of 30 occurrencesLate TriassicEarly Jurassic — about 9 of 30 occurrencesEarly JurassicMiddle Jurassic — about 0 of 30 occurrencesLate Jurassic — about 4 of 30 occurrencesLate Jurassic249–246 Mya — about 0.7 occurrences246–242 Mya — about 3 occurrences242–238 Mya — about 1 occurrence238–235 Mya — about 7 occurrences235–231 Mya — about 4 occurrences231–228 Mya — about 0.4 occurrences228–224 Mya — about 0.1 occurrences203–200 Mya — about 0.2 occurrences200–196 Mya — about 0.4 occurrences196–192 Mya — about 0.7 occurrences192–189 Mya — about 3 occurrences189–185 Mya — about 3 occurrences185–182 Mya — about 1 occurrence161–157 Mya — about 0.2 occurrences157–154 Mya — about 0.8 occurrences154–150 Mya — about 0.7 occurrences150–147 Mya — about 2 occurrences147–143 Mya — about 0.7 occurrences243.43 Mya149.2 Mya249 Mya143 Mya

30 occurrences of Pachyrisma 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

30 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

7 formations

Cassian — 46.68°N, 12.15°ECassian — 46.64°N, 12.20°ECassian — 46.53°N, 11.92°ECassian — 46.54°N, 11.62°ECassian — 46.57°N, 11.94°EWetterstein — 47.30°N, 11.37°EWetterstein — 47.30°N, 11.34°ECalcari Grigi — 45.58°N, 10.98°EBabino — 42.68°N, 23.32°EKorallenoolith — 52.13°N, 10.02°EGurumdy — 38.17°N, 74.00°EMassenkalk — 48.89°N, 11.94°E

Loading coastlines…

The named rock units Pachyrisma has been recovered from, largest first. Drawn where the rock is now, not where it formed. 12 occurrences have no formation on record, which is common for older literature.

Pachyrisma and its relatives

Late Triassic

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

Found in the same rock

1,124 taxa

The Paleobiology Database records 23 sites for Pachyrisma, 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

18 references

Each of the 30 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. 6 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 Pachyrisma

Source
GBIF
Credit
V. Logelin
Licence
CC0
Commercial use
the licence allows it

No 3D scan of Pachyrisma 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 itMegalodontidae through timeFormations of the Late TriassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Morris and Lycett 1850