Quadracythere

Quadracythere

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
HemicytheridaePBDB
Diet
detritivore, grazerPBDB, for Podocopida
Life habit
epifaunalPBDB, for Podocopida
Motility
actively mobilePBDB, for Ostracoda
Vision
limitedPBDB, for Ostracoda
Environment
freshwaterPBDB, for Hemicytheridae

Time the record covers

At least 35 million years on record.

The record covers at least 41.03 Mya to 5.333 Mya. No occurrence read is dated outside 48.07 Mya to 3.6 Mya.

Eocene — about 1 of 21 occurrencesEoceneOligocene — about 12 of 21 occurrencesOligoceneMiocene — about 6 of 21 occurrencesMiocenePliocene — about 2 of 21 occurrences49–47 Mya — about 0.1 occurrences47–46 Mya — about 0.2 occurrences46–44 Mya — about 0.2 occurrences44–43 Mya — about 0.2 occurrences43–41 Mya — about 0.2 occurrences41–40 Mya — about 0.0 occurrences35–34 Mya — about 0.1 occurrences34–32 Mya — about 0.4 occurrences32–30 Mya — about 0.4 occurrences30–29 Mya — about 0.4 occurrences29–27 Mya — about 0.4 occurrences27–26 Mya — about 4 occurrences26–24 Mya — about 4 occurrences24–23 Mya — about 3 occurrences23–21 Mya — about 0.7 occurrences21–20 Mya — about 0.7 occurrences20–18 Mya — about 0.7 occurrences18–17 Mya — about 0.7 occurrences17–15 Mya — about 0.5 occurrences15–14 Mya — about 0.4 occurrences14–12 Mya — about 0.4 occurrences12–10 Mya — about 0.5 occurrences10–8.9 Mya — about 0.5 occurrences8.9–7.3 Mya — about 0.5 occurrences7.3–5.8 Mya — about 0.5 occurrences5.8–4.3 Mya — about 1 occurrence4.3–2.7 Mya — about 0.8 occurrences41.03 Mya5.333 Mya49 Mya2.7 Mya

21 occurrences of Quadracythere 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

21 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

Lares Limestone — 18.37°N, 67.00°WCibao Marl — 18.38°N, 66.98°WPolonez Cove — 62.13°S, 58.18°WAntigua — 17.17°N, 61.80°WAntigua — 17.15°N, 61.80°WAguada Limestone — 18.38°N, 66.97°WPalizzi — 39.95°N, 16.03°ETiyon — 26.12°N, 67.83°ESan Sebastián — 18.35°N, 67.00°W

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The named rock units Quadracythere 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.

Quadracythere and its relatives

Oligocene

Where Quadracythere and its relatives were recorded in the Oligocene.

Found in the same rock

281 taxa

The Paleobiology Database records 18 sites for Quadracythere, 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

7 references

Each of the 21 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 Quadracythere

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

No 3D scan of Quadracythere was found in Sketchfab.

Smithsonian Open Access and MorphoSource were 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 itHemicytheridae through timeFormations of the OligoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Hornibrook 1952