Archaias

Archaias

via iDigBio · CC BY · 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
ArchaisinaePBDB
Diet
deposit feederPBDB, for Miliolina
Life habit
epifaunalPBDB, for Miliolina
Motility
stationaryPBDB, for Miliolina
Environment
hypersaline,marinePBDB, for Miliolina

Time the record covers

At least 21 million years on record.

The record covers at least 27.3 Mya to 5.333 Mya. No occurrence read is dated outside 33.9 Mya to 2.58 Mya.

Eocene — about 0 of 80 occurrencesOligocene — about 46 of 80 occurrencesOligoceneMiocene — about 29 of 80 occurrencesMiocenePliocene — about 5 of 80 occurrencesPliocenePleistocene — about 0 of 80 occurrences35–33 Mya — about 2 occurrences33–32 Mya — about 4 occurrences32–31 Mya — about 4 occurrences31–30 Mya — about 4 occurrences30–29 Mya — about 4 occurrences29–28 Mya — about 4 occurrences28–27 Mya — about 5 occurrences27–26 Mya — about 6 occurrences26–25 Mya — about 6 occurrences25–24 Mya — about 6 occurrences24–23 Mya — about 5 occurrences23–21 Mya — about 3 occurrences21–20 Mya — about 3 occurrences20–19 Mya — about 5 occurrences19–18 Mya — about 5 occurrences18–17 Mya — about 5 occurrences17–16 Mya — about 5 occurrences16–15 Mya — about 2 occurrences15–14 Mya — about 1 occurrence14–13 Mya — about 0.3 occurrences13–12 Mya — about 0.3 occurrences12–11 Mya — about 0.0 occurrences6.3–5.2 Mya — about 0.2 occurrences5.2–4.1 Mya — about 2 occurrences4.1–3.0 Mya — about 2 occurrences3.0–2.0 Mya — about 0.8 occurrences27.3 Mya5.333 Mya34.5 Mya2 Mya

80 occurrences of Archaias on record, most of them in the Oligocene. The Paleobiology Database records this as a living group, and the chart stops with its fossils rather than at the present. 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

80 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

13 formations

Qom Formation — 33.51°N, 51.99°EQom Formation — 34.51°N, 50.95°ELower Coralline Limestone — 35.92°N, 14.42°EQuilon Limestone — 8.86°N, 76.72°EQuilon Limestone — 8.84°N, 76.69°EQuilon Limestone — 8.97°N, 76.63°ELagunitas — 21.62°N, 79.53°WDubar — 11.24°N, 48.98°EEl Bosque — 37.90°N, 1.57°WSuwannee Limestone — 30.63°N, 85.59°WZiqlag — 31.28°N, 34.62°ETorreya — 30.18°N, 84.38°WCipero Marl — 10.27°N, 61.38°WMut — 36.83°N, 33.47°EQom — 35.50°N, 48.42°EPesco Falcone — 42.17°N, 14.10°E

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The named rock units Archaias has been recovered from, largest first. Drawn where the rock is now, not where it formed. 10 occurrences have no formation on record, which is common for older literature.

Archaias and its relatives

Oligocene

Where Archaias and its relatives were recorded in the Oligocene.

Found in the same rock

171 taxa

The Paleobiology Database records 65 sites for Archaias, 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

15 references

Each of the 80 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. 3 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 content2

Picture of Archaias

Source
iDigBio
Credit
via iDigBio
Licence
CC BY
Commercial use
the licence allows it

CT scan

Licence
not stated by the source
Commercial use
cannot be read from the licence given — check the record
Specimen
Archaias sp. · l-cb

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 itArchaisinae through timeFormations of the OligoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Montfort 1808