Thracia (Homoeodesma) trapezoides

Thracia (Homoeodesma) trapezoides

University of Washington Burke Museum · CC0 · via GBIF. 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
Also called
trapezoid thraciaPBDB
Sits inside
Thracia (Homoeodesma)PBDB
Diet
suspension feederPBDB, for Thraciidae
Life habit
deep infaunalPBDB, for Thracia
Motility
facultatively mobilePBDB, for Thraciidae
Vision
blindPBDB, for Bivalvia

Time the record covers

At least 22 million years on record.

The record covers at least 23.04 Mya to 774 ka. No occurrence read is dated outside 33.9 Mya to 11.7 ka.

Eocene — about 0 of 66 occurrencesOligocene — about 19 of 66 occurrencesOligoceneMiocene — about 16 of 66 occurrencesMiocenePliocene — about 7 of 66 occurrencesPleistocene — about 24 of 66 occurrences35–33 Mya — about 0.4 occurrences33–32 Mya — about 1.0 occurrences32–31 Mya — about 1.0 occurrences31–30 Mya — about 1.0 occurrences30–29 Mya — about 1.0 occurrences29–28 Mya — about 1.0 occurrences28–27 Mya — about 3 occurrences27–25 Mya — about 4 occurrences25–24 Mya — about 4 occurrences24–23 Mya — about 4 occurrences23–22 Mya — about 2 occurrences22–21 Mya — about 2 occurrences21–20 Mya — about 2 occurrences20–18 Mya — about 1 occurrence18–17 Mya — about 1 occurrence17–16 Mya — about 1 occurrence16–15 Mya — about 0.7 occurrences15–14 Mya — about 0.5 occurrences14–13 Mya — about 0.0 occurrences13–12 Mya — about 0.1 occurrences12–10 Mya — about 0.9 occurrences10–9.2 Mya — about 0.9 occurrences9.2–8.1 Mya — about 0.9 occurrences8.1–6.9 Mya — about 0.9 occurrences6.9–5.8 Mya — about 0.9 occurrences5.8–4.6 Mya — about 1 occurrence4.6–3.5 Mya — about 2 occurrences3.5–2.3 Mya — about 5 occurrences2.3–1.2 Mya — about 2 occurrences1.2–0 Mya — about 21 occurrences23.04 Mya774 ka34.6 Mya0 Mya

66 occurrences of Thracia (Homoeodesma) trapezoides on record, most of them in the Pleistocene. The Paleobiology Database records this as a living group. 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

66 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

14 formations

Timms Point Silt — 33.73°N, 118.28°WClallam — 48.23°N, 124.14°WClallam — 48.27°N, 122.25°WClallam — 48.20°N, 122.11°WClallam — 48.26°N, 124.25°WPico — 33.94°N, 117.89°WPico — 34.42°N, 118.70°WPico — 34.36°N, 118.56°WBlakeley — 47.95°N, 122.07°WBlakeley — 47.58°N, 122.48°WBlakeley — 47.85°N, 122.10°WAstoria — 43.40°N, 124.28°WAstoria — 44.72°N, 124.06°WLomita Marl — 33.74°N, 118.28°WTwin River — 48.17°N, 123.98°WSan Pedro Sand — 33.71°N, 118.27°WAnchor — 34.04°N, 118.40°WElk River — 42.74°N, 124.49°WEmpire — 43.39°N, 124.28°WFernando — 34.05°N, 118.25°WPysht — 48.17°N, 123.94°WTwin Rivers — 48.22°N, 124.15°W

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The named rock units Thracia (Homoeodesma) trapezoides has been recovered from, largest first. Drawn where the rock is now, not where it formed. 18 occurrences have no formation on record, which is common for older literature.

Thracia (Homoeodesma) trapezoides and its relatives

Pleistocene

Where Thracia (Homoeodesma) trapezoides and its relatives were recorded in the Pleistocene.

Found in the same rock

568 taxa

The Paleobiology Database records 38 sites for Thracia (Homoeodesma) trapezoides, 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

20 references

Each of the 66 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. 8 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 Thracia (Homoeodesma) trapezoides

Source
GBIF
Credit
University of Washington Burke Museum
Licence
CC0
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
Thracia stimpsoni · USNM:IZ:USNM 485625

This is what the site found, which is not the same as what exists.

Keep going

What may have been alongside itThracia (Homoeodesma) through timeFormations of the PleistoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Conrad 1849)