Gemma magna

Gemma magna

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
GemmaPBDB
Diet
suspension feederPBDB, for Veneridae
Life habit
infaunalPBDB, for Veneridae
Motility
facultatively mobilePBDB, for Veneridae
Vision
blindPBDB, for Bivalvia

Time the record covers

At least 22 million years on record.

The record covers at least 23.04 Mya to 129 ka. No occurrence read is dated outside 27.3 Mya to 11.7 ka.

Oligocene — about 1 of 41 occurrencesOligoceneMiocene — about 0 of 41 occurrencesPliocene — about 18 of 41 occurrencesPliocenePleistocene — about 22 of 41 occurrencesPleistocene28–27 Mya — about 0.1 occurrences27–26 Mya — about 0.2 occurrences26–25 Mya — about 0.2 occurrences25–24 Mya — about 0.2 occurrences24–23 Mya — about 0.2 occurrences23–22 Mya — about 0.0 occurrences5.6–4.6 Mya — about 2 occurrences4.6–3.7 Mya — about 2 occurrences3.7–2.8 Mya — about 12 occurrences2.8–1.9 Mya — about 10 occurrences1.9–928 ka Mya — about 8 occurrences928 ka–0 Mya — about 6 occurrences23.04 Mya129 ka27.8 Mya0 Mya

41 occurrences of Gemma magna on record, most of them in the Pleistocene. 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

41 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

10 formations

Waccamaw — 34.23°N, 77.94°WWaccamaw — 34.29°N, 78.51°WWaccamaw — 34.33°N, 78.20°WWaccamaw — 34.50°N, 79.11°WWaccamaw — 34.63°N, 78.57°WWaccamaw — 34.56°N, 78.49°WWaccamaw — 34.21°N, 81.31°WWaccamaw — 33.63°N, 79.16°WWaccamaw — 33.40°N, 79.25°WYorktown — 35.51°N, 77.62°WYorktown — 35.54°N, 77.67°WYorktown — 37.25°N, 76.50°WYorktown — 34.90°N, 78.05°WDuplin — 34.50°N, 79.11°WDuplin — 34.62°N, 79.01°WDuplin — 34.90°N, 78.05°WCanepatch — 33.83°N, 78.89°WCaloosahatchee — 26.77°N, 81.15°WCaloosahatchee — 26.93°N, 82.05°WJames City — 35.28°N, 76.65°WJackson Bluff — 30.39°N, 84.64°WChowan River — 36.05°N, 76.73°WTamiami — 26.37°N, 80.85°WBelgrade — 34.77°N, 77.18°W

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The named rock units Gemma magna has been recovered from, largest first. Drawn where the rock is now, not where it formed. 2 occurrences have no formation on record, which is common for older literature.

Gemma magna and its relatives

Pleistocene

Where Gemma magna and its relatives were recorded in the Pleistocene.

Found in the same rock

594 taxa

The Paleobiology Database records 31 sites for Gemma magna, 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

10 references

Each of the 41 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 content1

Picture of Gemma magna

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

No 3D scan of Gemma magna was found in MorphoSource and Sketchfab.

Smithsonian Open Access was 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 itGemma through timeFormations of the PleistoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Dall 1903