Petrocrania

Searched as Petrocrania obsoleta. The Paleobiology Database treats Petrocrania as the accepted name.

Petrocrania

Dwergenpaartje · CC BY-SA 3.0 · via Wikidata/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
CraniidaePBDB
Diet
suspension feederPBDB
Life habit
epifaunalPBDB
Motility
stationary, attached, epibiontPBDB
Vision
blindPBDB, for Craniata
Environment
marinePBDB, for Craniata

Time the record covers

At most 21 million years on record.

Every occurrence read is dated to somewhere between 463.3 Mya and 443.1 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Ordovician — about 8 of 8 occurrencesOrdovicianSilurian — about 0 of 8 occurrences464–463 Mya — about 0.1 occurrences463–462 Mya — about 0.3 occurrences462–462 Mya — about 0.3 occurrences462–461 Mya — about 0.3 occurrences461–460 Mya — about 0.3 occurrences460–460 Mya — about 0.3 occurrences460–459 Mya — about 0.5 occurrences459–458 Mya — about 0.5 occurrences458–457 Mya — about 0.5 occurrences457–457 Mya — about 0.5 occurrences457–456 Mya — about 0.4 occurrences456–455 Mya — about 0.4 occurrences455–455 Mya — about 0.4 occurrences455–454 Mya — about 0.4 occurrences454–453 Mya — about 0.4 occurrences453–452 Mya — about 0.4 occurrences452–452 Mya — about 0.3 occurrences452–451 Mya — about 0.3 occurrences451–450 Mya — about 0.3 occurrences450–450 Mya — about 0.2 occurrences450–449 Mya — about 0.1 occurrences449–448 Mya — about 0.1 occurrences448–448 Mya — about 0.1 occurrences448–447 Mya — about 0.1 occurrences447–446 Mya — about 0.1 occurrences446–445 Mya — about 0.1 occurrences445–445 Mya — about 0.1 occurrences445–444 Mya — about 0.0 occurrences444–443 Mya — about 0.0 occurrences443–443 Mya — about 0.0 occurrences463.8 Mya442.6 Mya

8 occurrences of Petrocrania on record, most of them in the Ordovician. 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

8 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

Liben — 50.00°N, 14.00°ELiben — 49.72°N, 13.57°ELiben — 49.80°N, 13.63°EBohdalec — 50.00°N, 14.00°ELetna — 50.00°N, 14.00°EZahorany — 50.00°N, 14.00°E

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The named rock units Petrocrania has been recovered from, largest first. Drawn where the rock is now, not where it formed.

Petrocrania and its relatives

Ordovician

Where Petrocrania and its relatives were recorded in the Ordovician.

Found in the same rock

2,584 taxa

The Paleobiology Database records 287 sites for Petrocrania, and this reads 240 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

2 references

Each of the 8 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. Each entry links to the Paleobiology Database's own record for the work.

Media and terms

Media content1

Picture of Petrocrania

Credit
Dwergenpaartje
Licence
CC BY-SA 3.0
Commercial use
the licence allows it

No 3D scan of Petrocrania was found in MorphoSource and Sketchfab.

Smithsonian Open Access was 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 itCraniidae through timeFormations of the OrdovicianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Raymond 1910