Trichasteropsis

Searched as Trichaster. The Paleobiology Database treats Trichasteropsis as the accepted name.

Trichaster is a genus of echinoderms belonging to the family Euryalidae.

Trichasteropsis

Baker, A.N., Okanishi, M. & Pawson, D.L. 2018. Euryalid brittle stars from the International Indian Ocean Expedition… · CC BY 3.0 · 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
TrichasteropsiidaePBDB
Diet
carnivorePBDB, for Asteroidea
Life habit
low-level epifaunalPBDB, for Asteroidea
Motility
slow-movingPBDB, for Asteroidea
Vision
limitedPBDB, for Asteroidea
Environment
marinePBDB, for Echinodermata

Time the record covers

At least 171 million years on record.

The record covers at least 243.43 Mya to 72.2 Mya. No occurrence read is dated outside 247 Mya to 61.66 Mya.

Early Triassic — about 0 of 36 occurrencesMiddle Triassic — about 19 of 36 occurrencesLate Triassic — about 0 of 36 occurrencesEarly Jurassic — about 0 of 36 occurrencesMiddle Jurassic — about 0 of 36 occurrencesLate Jurassic — about 0 of 36 occurrencesEarly Cretaceous — about 0 of 36 occurrencesLate Cretaceous — about 15 of 36 occurrencesLate CretaceousPaleocene — about 2 of 36 occurrences251–244 Mya — about 2 occurrences244–238 Mya — about 15 occurrences238–231 Mya — about 2 occurrences84–77 Mya — about 1 occurrence77–71 Mya — about 4 occurrences71–64 Mya — about 11 occurrences64–58 Mya — about 1 occurrence243.43 Mya72.2 Mya251 Mya58 Mya

36 occurrences of Trichasteropsis 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

36 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

8 formations

Maastricht — 50.85°N, 5.70°EMaastricht — 50.86°N, 5.79°EGulpen — 50.73°N, 5.67°EGulpen — 50.80°N, 5.67°EWhite Chalk — 54.52°N, 13.63°EMaastricht — 50.80°N, 5.67°EMuschelkalk — 52.48°N, 13.78°EMuschelkalk — 51.37°N, 10.87°EJena — 51.54°N, 10.00°EJena — 51.44°N, 9.84°EMeissner — 49.98°N, 11.62°EBuchenstein — 45.94°N, 9.39°E

Loading coastlines…

The named rock units Trichasteropsis has been recovered from, largest first. Drawn where the rock is now, not where it formed. 16 occurrences have no formation on record, which is common for older literature.

Trichasteropsis and its relatives

Middle Triassic

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

Found in the same rock

14 taxa

The Paleobiology Database records 17 sites for Trichasteropsis, and this reads all of them. The number is how many of those sites it was catalogued from too.

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

5 references

Each of the 36 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 Trichasteropsis

Credit
Baker, A.N., Okanishi, M. & Pawson, D.L. 2018. Euryalid brittle stars from the International Indian Ocean Expedition…
Licence
CC BY 3.0
Commercial use
the licence allows it

No 3D scan was found. Smithsonian Open Access, MorphoSource and Sketchfab were all searched.

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 itTrichasteropsiidae through timeFormations of the Middle TriassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Eck 1879