Palaeocoma

Palaeocoma is an extinct genus of brittle stars that lived during the Middle Triassic to Early Jurassic Periods. Its fossils have been found in Europe.

Palaeocoma

en:User:Dlloyd · CC BY-SA 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
OphiodermatidaePBDB
Diet
carnivore, detritivorePBDB, for Ophiodermatidae
Life habit
epifaunalPBDB, for Ophiodermatidae
Motility
actively mobilePBDB, for Ophiodermatidae
Vision
blindPBDB, for Ophiuroidea
Environment
marinePBDB, for Ophiuroidea

Time the record covers

At least 52 million years on record.

The record covers at least 237 Mya to 184.2 Mya. No occurrence read is dated outside 241.464 Mya to 182.9 Mya.

Middle Triassic — about 1 of 20 occurrencesMiddle TriassicLate Triassic — about 1 of 20 occurrencesLate TriassicEarly Jurassic — about 18 of 20 occurrencesEarly Jurassic243–241 Mya — about 0.2 occurrences241–239 Mya — about 0.5 occurrences239–237 Mya — about 0.4 occurrences206–204 Mya — about 0.4 occurrences204–202 Mya — about 0.5 occurrences202–200 Mya — about 2 occurrences200–198 Mya — about 1 occurrence198–196 Mya — about 0.9 occurrences196–194 Mya — about 0.9 occurrences194–192 Mya — about 2 occurrences192–190 Mya — about 3 occurrences190–188 Mya — about 3 occurrences188–186 Mya — about 3 occurrences186–184 Mya — about 3 occurrences184–182 Mya — about 1 occurrence237 Mya184.2 Mya243 Mya182 Mya

20 occurrences of Palaeocoma on record, most of them in the Early 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

20 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

Charmouth Mudstone — 52.06°N, 1.76°WCharmouth Mudstone — 52.33°N, 1.18°WCharmouth Mudstone — 54.55°N, 0.79°WMiddle Lias — 52.02°N, 1.71°WInsektenmergel — 47.47°N, 8.23°EBridport Sand — 50.71°N, 2.76°WWengener Schichten — 42.31°N, 18.89°ELombardische Kieselkalk — 46.00°N, 9.08°EDyrham — 50.71°N, 2.78°W

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The named rock units Palaeocoma 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.

Palaeocoma and its relatives

Early Jurassic

Where Palaeocoma and its relatives were recorded in the Early Jurassic.

Found in the same rock

129 taxa

The Paleobiology Database records 19 sites for Palaeocoma, 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

14 references

Each of the 20 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. 2 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 Palaeocoma

Credit
en:User:Dlloyd
Licence
CC BY-SA 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 itOphiodermatidae through timeFormations of the Early JurassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. d'Orbigny 1850