Mactromeris polynyma

Mactromeris polynyma

via iDigBio · 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
Also called
Arctic surf clamPBDB
Sits inside
MactromerisPBDB
Diet
suspension feederPBDB, for Mactridae
Life habit
infaunalPBDB, for Mactridae
Motility
facultatively mobilePBDB, for Mactridae
Vision
blindPBDB, for Bivalvia

Time the record covers

At least 37 million years on record.

The record covers at least 37.71 Mya to 129 ka. No occurrence read is dated outside 56 Mya to 11.7 ka.

Paleocene — about 0 of 45 occurrencesEocene — about 2 of 45 occurrencesEoceneOligocene — about 2 of 45 occurrencesOligoceneMiocene — about 28 of 45 occurrencesMiocenePliocene — about 6 of 45 occurrencesPleistocene — about 7 of 45 occurrences57–55 Mya — about 0.0 occurrences55–53 Mya — about 0.1 occurrences53–51 Mya — about 0.1 occurrences51–50 Mya — about 0.1 occurrences50–48 Mya — about 0.1 occurrences48–46 Mya — about 0.3 occurrences46–44 Mya — about 0.3 occurrences44–42 Mya — about 0.3 occurrences42–40 Mya — about 0.3 occurrences40–38 Mya — about 0.3 occurrences38–36 Mya — about 0.1 occurrences36–34 Mya — about 0.1 occurrences34–32 Mya — about 0.4 occurrences32–30 Mya — about 0.5 occurrences30–29 Mya — about 0.5 occurrences29–27 Mya — about 0.4 occurrences27–25 Mya — about 0.2 occurrences25–23 Mya — about 0.2 occurrences23–21 Mya — about 0.5 occurrences21–19 Mya — about 0.9 occurrences19–17 Mya — about 1.0 occurrences17–15 Mya — about 2 occurrences15–13 Mya — about 5 occurrences13–11 Mya — about 6 occurrences11–9.5 Mya — about 5 occurrences9.5–7.6 Mya — about 5 occurrences7.6–5.7 Mya — about 2 occurrences5.7–3.8 Mya — about 3 occurrences3.8–1.9 Mya — about 6 occurrences1.9–0 Mya — about 5 occurrences37.71 Mya129 ka57 Mya0 Mya

45 occurrences of Mactromeris polynyma on record, most of them in the Miocene. 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

45 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

31 formations

Tachilni — 54.98°N, 162.85°WTachilni — 54.79°N, 163.36°WTachilni — 54.95°N, 163.05°WTachilni — 54.97°N, 163.17°WTachilni — 54.85°N, 163.41°WUspenskaya — 60.42°N, 165.92°EIl'inskaya — 57.78°N, 158.58°EPresumpscot — 43.64°N, 70.26°WPresumpscot — 43.56°N, 70.20°WMerced — 43.12°N, 124.43°WMerced — 38.37°N, 122.92°WGubik — 70.07°N, 151.39°WAluginskaya — 59.83°N, 165.00°EEnemtenskaya — 58.00°N, 158.00°EErmanovskaya — 58.50°N, 159.17°EEtolonskaya — 58.42°N, 159.00°EEzhovyi — 60.42°N, 165.92°EKakertskaya — 62.50°N, 165.00°EKuluvenskaya — 58.50°N, 159.17°ELimimtevayamskaya — 58.97°N, 163.92°EPakhachinskaya — 60.00°N, 165.00°ESnatol'skaya — 57.78°N, 158.58°ETkapravayamskaya — 60.87°N, 163.67°EYaponskikh Kamney — 60.22°N, 165.50°ETomioka — 42.77°N, 143.02°EAusinskaya — 47.05°N, 142.06°EGastellovskaya — 49.10°N, 142.96°EMaruyamskaya — 47.42°N, 142.50°EMatitukskaya — 54.16°N, 142.56°ESertunayskaya — 49.11°N, 142.90°E

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The named rock units Mactromeris polynyma has been recovered from, largest first. Drawn where the rock is now, not where it formed. 7 further formations hold fewer occurrences each and are not listed. 1 occurrence has no formation on record, which is common for older literature.

Mactromeris polynyma and its relatives

Miocene

Where Mactromeris polynyma and its relatives were recorded in the Miocene.

Found in the same rock

488 taxa

The Paleobiology Database records 30 sites for Mactromeris polynyma, 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

14 references

Each of the 45 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. 2 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 content1

Picture of Mactromeris polynyma

Source
iDigBio
Credit
via iDigBio
Licence
not stated by the source
Commercial use
cannot be read from the licence given — check the record

No 3D scan of Mactromeris polynyma 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 itMactromeris through timeFormations of the MioceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Stimpson 1860)