Lutraria

Lutraria is a genus of medium-sized marine bivalve mollusks or clams, commonly known as otter shells.

Lutraria

Jan Johan ter Poorten · 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
Sits inside
LutrariinaePBDB
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 33 million years on record.

The record covers at least 33.9 Mya to 11.7 ka. No occurrence read is dated outside 37.71 Mya to 0 Mya.

Eocene — about 1 of 97 occurrencesEoceneOligocene — about 6 of 97 occurrencesOligoceneMiocene — about 43 of 97 occurrencesMiocenePliocene — about 20 of 97 occurrencesPleistocene — about 25 of 97 occurrences38–37 Mya — about 0.1 occurrences37–36 Mya — about 0.3 occurrences36–35 Mya — about 0.3 occurrences35–33 Mya — about 0.4 occurrences33–32 Mya — about 0.6 occurrences32–31 Mya — about 0.6 occurrences31–29 Mya — about 0.6 occurrences29–28 Mya — about 0.6 occurrences28–27 Mya — about 0.7 occurrences27–26 Mya — about 0.9 occurrences26–24 Mya — about 0.9 occurrences24–23 Mya — about 0.9 occurrences23–22 Mya — about 2 occurrences22–21 Mya — about 2 occurrences21–19 Mya — about 2 occurrences19–18 Mya — about 2 occurrences18–17 Mya — about 2 occurrences17–15 Mya — about 3 occurrences15–14 Mya — about 3 occurrences14–13 Mya — about 12 occurrences13–12 Mya — about 5 occurrences12–10 Mya — about 2 occurrences10–9.0 Mya — about 2 occurrences9.0–7.7 Mya — about 2 occurrences7.7–6.4 Mya — about 3 occurrences6.4–5.1 Mya — about 4 occurrences5.1–3.8 Mya — about 9 occurrences3.8–2.6 Mya — about 10 occurrences2.6–1.3 Mya — about 11 occurrences1.3–0 Mya — about 16 occurrences33.9 Mya11.7 ka38.5 Mya0 Mya

97 occurrences of Lutraria 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

97 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

Coralline Crag — 52.75°N, 1.53°ECoralline Crag — 52.03°N, 1.38°ECoralline Crag — 52.12°N, 1.55°ELillo — 51.25°N, 4.28°EPreplans Sandstone — 46.22°N, 12.80°ERio Foyel — 41.73°S, 71.42°WFels — 48.50°N, 15.76°EUpper Bhuban — 23.00°N, 93.00°EToshima Sand — 34.62°N, 137.22°EUpper Cyrena — 47.50°N, 19.08°EMaraldi Sandstone — 46.22°N, 12.80°EBarton Beds — 50.67°N, 1.57°WOtahuhu — 36.95°S, 174.84°EPinczow — 50.53°N, 20.53°EAbbas — 16.75°N, 42.00°EChatti Mudstone — 25.25°N, 62.25°EOrmara & Jiwani — 25.25°N, 62.25°EBurgeschleinitz — 48.63°N, 15.78°EBaghmara — 25.17°N, 90.67°EMuddy Creek — 37.73°S, 142.02°EGavdos — 34.83°N, 24.08°EApostoli — 35.25°N, 24.58°EKourtes — 35.20°N, 25.10°EPielach — 48.22°N, 15.30°EMiddle Fars — 29.00°N, 51.58°EBoat Cove — 29.22°S, 177.83°W

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The named rock units Lutraria 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. 53 occurrences have no formation on record, which is common for older literature.

Lutraria and its relatives

Miocene

Where Lutraria and its relatives were recorded in the Miocene.

Found in the same rock

1,750 taxa

The Paleobiology Database records 61 sites for Lutraria, and this reads all 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

49 references

Each of the 97 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. 37 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 Lutraria

Credit
Jan Johan ter Poorten
Licence
CC BY-SA 3.0
Commercial use
the licence allows it

No 3D scan was found. Smithsonian Open Access, MorphoSource and Sketchfab were all searched.

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 itLutrariinae through timeFormations of the MioceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Lamarck 1799