Glycymeris

Searched as Glycymeris (Tucetona) secticostata schencki. The Paleobiology Database treats Glycymeris as the accepted name.

Glycymeris, common name the bittersweet clams, is a genus of saltwater clams, marine bivalve molluscs in the family Glycymerididae.

Glycymeris

Hectonichus · CC BY-SA 3.0 · via Wikipedia/Commons. 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
bittersweet clamPBDB
Sits inside
GlycymeridinaePBDB
Diet
suspension feederPBDB
Life habit
infaunalPBDB
Motility
facultatively mobilePBDB
Vision
blindPBDB, for Bivalvia
Environment
coastal,inner shelf,outer shelf,oceanicPBDB, for Glycymerididae

Time the record covers

At least 13 million years on record.

The record covers at least 20.45 Mya to 7.246 Mya. No occurrence read is dated outside 23.04 Mya to 5.333 Mya.

Oligocene — about 0 of 9 occurrencesMiocene — about 9 of 9 occurrencesMiocenePliocene — about 0 of 9 occurrences24–23 Mya — about 0.0 occurrences23–22 Mya — about 0.2 occurrences22–22 Mya — about 0.2 occurrences22–21 Mya — about 0.2 occurrences21–20 Mya — about 0.2 occurrences20–20 Mya — about 0.1 occurrences20–19 Mya — about 0.1 occurrences19–19 Mya — about 0.1 occurrences19–18 Mya — about 0.1 occurrences18–17 Mya — about 0.1 occurrences17–17 Mya — about 0.1 occurrences17–16 Mya — about 0.1 occurrences16–15 Mya — about 0.0 occurrences12–11 Mya — about 0.8 occurrences11–10 Mya — about 0.9 occurrences10–9.8 Mya — about 0.9 occurrences9.8–9.2 Mya — about 0.9 occurrences9.2–8.6 Mya — about 0.9 occurrences8.6–8.0 Mya — about 0.9 occurrences8.0–7.3 Mya — about 0.9 occurrences7.3–6.7 Mya — about 0.4 occurrences6.7–6.1 Mya — about 0.3 occurrences6.1–5.5 Mya — about 0.3 occurrences5.5–4.8 Mya — about 0.1 occurrences20.45 Mya7.246 Mya23.5 Mya4.8 Mya

9 occurrences of Glycymeris on record, most of them in the Miocene. The Paleobiology Database records this as a living group, and the chart stops with its fossils rather than at the present. 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

9 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

3 formations

Gatun — 9.35°N, 79.83°WGatun — 9.29°N, 79.92°WCulebra — 9.03°N, 79.63°WCulebra — 9.13°N, 79.62°WChagres Sandstone — 9.15°N, 79.96°W

Loading coastlines…

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

Glycymeris and its relatives

Miocene

Where Glycymeris and its relatives were recorded in the Miocene.

Found in the same rock

2,514 taxa

The Paleobiology Database records 1,154 sites for Glycymeris, and this reads 240 of them. Of that, one read hit the database's own return limit, so every count below is a floor rather than a total. 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

2 references

Each of the 9 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. Each entry links to doi.org. Relayed as the Paleobiology Database holds them, not checked against what they resolve to.

Media and terms

Media content3

Picture of Glycymeris

Credit
Hectonichus
Licence
CC BY-SA 3.0
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
Glycymeris glycymeris · USNM:IZ:USNM 199801

3D model

Source
Sketchfab
Licence
CC0 Public Domain
Commercial use
the licence allows it

Smithsonian Open Access was not reached for this taxon, so this list is what the others held rather than everything there is.

The description on this site

Licence
CC BY-SA 4.0

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

Keep going

What may have been alongside itGlycymeridinae through timeFormations of the MioceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Da Costa 1778