Macoma (Macoma) twinensis

Macoma (Macoma) twinensis

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
Sits inside
Macoma (Macoma)PBDB
Diet
deposit feederPBDB, for Tellinidae
Life habit
infaunalPBDB, for Tellinidae
Motility
facultatively mobilePBDB, for Tellinidae
Vision
blindPBDB, for Bivalvia

Time the record covers

At least 6.8 million years on record.

The record covers at least 27.3 Mya to 20.45 Mya. No occurrence read is dated outside 33.9 Mya to 11.63 Mya.

Eocene — about 0 of 18 occurrencesOligocene — about 12 of 18 occurrencesOligoceneMiocene — about 6 of 18 occurrencesMiocene34–34 Mya — about 0.1 occurrences34–33 Mya — about 0.3 occurrences33–32 Mya — about 0.3 occurrences32–31 Mya — about 0.3 occurrences31–31 Mya — about 0.3 occurrences31–30 Mya — about 0.3 occurrences30–29 Mya — about 0.3 occurrences29–28 Mya — about 0.3 occurrences28–27 Mya — about 0.3 occurrences27–27 Mya — about 1 occurrence27–26 Mya — about 2 occurrences26–25 Mya — about 2 occurrences25–24 Mya — about 2 occurrences24–24 Mya — about 2 occurrences24–23 Mya — about 1 occurrence23–22 Mya — about 0.6 occurrences22–21 Mya — about 0.6 occurrences21–20 Mya — about 0.6 occurrences20–20 Mya — about 0.4 occurrences20–19 Mya — about 0.4 occurrences19–18 Mya — about 0.4 occurrences18–17 Mya — about 0.4 occurrences17–17 Mya — about 0.4 occurrences17–16 Mya — about 0.4 occurrences16–15 Mya — about 0.4 occurrences15–14 Mya — about 0.4 occurrences14–13 Mya — about 0.4 occurrences13–13 Mya — about 0.4 occurrences13–12 Mya — about 0.4 occurrences12–11 Mya — about 0.1 occurrences27.3 Mya20.45 Mya34.4 Mya11.1 Mya

18 occurrences of Macoma (Macoma) twinensis on record, most of them in the Oligocene. 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

18 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

7 formations

Narrow Cape — 56.54°N, 154.34°WBlakeley — 47.58°N, 122.48°WBlakeley — 48.16°N, 123.95°WBlakeley — 47.55°N, 122.34°WBlakeley — 47.57°N, 122.11°WClallam — 48.23°N, 124.14°WClallam — 48.27°N, 122.25°WTwin River — 48.17°N, 123.98°WTwin River — 48.16°N, 123.92°WPysht — 48.16°N, 123.96°WPysht — 48.17°N, 123.94°WTopsy — 58.64°N, 137.58°WLincoln Creek — 46.49°N, 123.80°W

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

Macoma (Macoma) twinensis and its relatives

Oligocene

Where Macoma (Macoma) twinensis and its relatives were recorded in the Oligocene.

Found in the same rock

167 taxa

The Paleobiology Database records 11 sites for Macoma (Macoma) twinensis, 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 18 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 content2

Picture of Macoma (Macoma) twinensis

Source
GBIF
Credit
University of Washington Burke Museum
Licence
CC0
Commercial use
the licence allows it

CT scan

Licence
In Copyright
Commercial use
cannot be read from the licence given — check the record
Specimen
Macoma calcarea · fmnh:invertebrate zoology:71115

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

Keep going

What may have been alongside itMacoma (Macoma) through timeFormations of the OligoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Clark 1925)