Mactromeris hemphillii

Mactromeris hemphillii

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
Also called
Hemphill's dish 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 15 million years on record.

The record covers at least 15.98 Mya to 129 ka. No occurrence read is dated outside 23.04 Mya to 11.7 ka.

Oligocene — about 0 of 45 occurrencesMiocene — about 5 of 45 occurrencesMiocenePliocene — about 10 of 45 occurrencesPliocenePleistocene — about 30 of 45 occurrencesPleistocene24–23 Mya — about 0.0 occurrences23–22 Mya — about 0.1 occurrences22–21 Mya — about 0.1 occurrences21–20 Mya — about 0.1 occurrences20–20 Mya — about 0.1 occurrences20–19 Mya — about 0.1 occurrences19–18 Mya — about 0.1 occurrences18–17 Mya — about 0.1 occurrences17–16 Mya — about 0.1 occurrences16–16 Mya — about 0.1 occurrences7.8–7.1 Mya — about 0.4 occurrences7.1–6.3 Mya — about 2 occurrences6.3–5.5 Mya — about 2 occurrences5.5–4.7 Mya — about 2 occurrences4.7–3.9 Mya — about 2 occurrences3.9–3.1 Mya — about 3 occurrences3.1–2.4 Mya — about 9 occurrences2.4–1.6 Mya — about 14 occurrences1.6–785 ka Mya — about 0.6 occurrences785 ka–0 Mya — about 10 occurrences15.98 Mya129 ka23.5 Mya0 Mya

45 occurrences of Mactromeris hemphillii 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

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

11 formations

Careaga Sandstone — 34.88°N, 120.51°WCareaga Sandstone — 34.84°N, 120.41°WCareaga Sandstone — 34.74°N, 120.41°WCareaga Sandstone — 34.90°N, 120.32°WCareaga Sandstone — 34.82°N, 120.45°WPalos Verdes Sand — 33.80°N, 118.16°WPalos Verdes Sand — 33.99°N, 118.45°WPalos Verdes Sand — 33.60°N, 117.88°WPalos Verdes Sand — 33.74°N, 118.28°WPico — 34.36°N, 118.56°WPico — 34.33°N, 118.72°WPico — 34.42°N, 118.70°WPancho Rico — 35.99°N, 120.79°WPancho Rico — 35.97°N, 120.73°WPancho Rico — 35.89°N, 120.56°WSisquoc — 34.81°N, 120.22°WFernando — 34.05°N, 118.25°WTowsley — 34.36°N, 118.51°WSan Diego — 32.49°N, 117.12°WPalos Verdes — 33.63°N, 117.90°WVaqueros — 34.06°N, 118.70°WSan Diego — 32.54°N, 117.11°W

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The named rock units Mactromeris hemphillii has been recovered from, largest first. Drawn where the rock is now, not where it formed. 4 occurrences have no formation on record, which is common for older literature.

Mactromeris hemphillii and its relatives

Pleistocene

Where Mactromeris hemphillii and its relatives were recorded in the Pleistocene.

Found in the same rock

1,061 taxa

The Paleobiology Database records 43 sites for Mactromeris hemphillii, 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

18 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. 6 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 hemphillii

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

No 3D scan of Mactromeris hemphillii 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 PleistoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Dall 1894)