Placostegus

Placostegus

via iDigBio · CC0 · 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
SerpulimorphaPBDB
Diet
suspension feederPBDB, for Serpulimorpha
Life habit
epifaunalPBDB, for Serpulimorpha
Motility
stationary, epibiontPBDB, for Serpulimorpha
Vision
limitedPBDB, for Polychaeta
Environment
marine,brackishPBDB, for Serpulimorpha

Time the record covers

At least 125 million years on record.

The record covers at least 125.77 Mya to 129 ka. No occurrence read is dated outside 137.05 Mya to 11.7 ka.

Early Cretaceous — about 2 of 6 occurrencesEarly CretaceousLate Cretaceous — about 0 of 6 occurrencesPaleocene — about 1 of 6 occurrencesEocene — about 0 of 6 occurrencesOligocene — about 0 of 6 occurrencesMiocene — about 1 of 6 occurrencesMiocenePliocene — about 0 of 6 occurrencesPleistocene — about 2 of 6 occurrences140–135 Mya — about 0.2 occurrences135–130 Mya — about 0.4 occurrences130–126 Mya — about 0.4 occurrences126–121 Mya — about 1 occurrence70–65 Mya — about 0.2 occurrences65–61 Mya — about 0.8 occurrences9.3–4.7 Mya — about 1 occurrence4.7–0 Mya — about 2 occurrences125.77 Mya129 ka140 Mya0 Mya

6 occurrences of Placostegus on record, most of them in the Early Cretaceous. 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

6 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

3 formations

Brèches rouges de Carboneras — 37.60°N, 1.32°WAgrio — 39.35°S, 70.13°WKincaid — 31.29°N, 96.72°W

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The named rock units Placostegus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 3 occurrences have no formation on record, which is common for older literature.

Placostegus and its relatives

Early Cretaceous

Where Placostegus and its relatives were recorded in the Early Cretaceous.

Found in the same rock

510 taxa

The Paleobiology Database records 4 sites for Placostegus, 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

6 references

Each of the 6 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 Placostegus

Source
iDigBio
Credit
via iDigBio
Licence
CC0
Commercial use
the licence allows it

No 3D scan of Placostegus 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 itSerpulimorpha through timeFormations of the Early CretaceousThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0.