Emarginula

Emarginula is a genus of small keyhole limpets, marine gastropod molluscs in the family Fissurellidae.

Emarginula

GrahamBould · Public Domain · 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
EmarginulinaePBDB
Diet
grazer, carnivorePBDB
Life habit
epifaunalPBDB
Motility
facultatively mobilePBDB
Vision
limitedPBDB, for Gastropoda

Time the record covers

At least 233 million years on record.

The record covers at least 233.6 Mya to 11.7 ka. No occurrence read is dated outside 237 Mya to 0 Mya.

Middle Triassic — about 0 of 185 occurrencesLate Triassic — about 6 of 185 occurrencesLate TriassicEarly Jurassic — about 13 of 185 occurrencesEarly JurassicMiddle Jurassic — about 2 of 185 occurrencesLate Jurassic — about 2 of 185 occurrencesEarly Cretaceous — about 14 of 185 occurrencesEarly CretaceousLate Cretaceous — about 11 of 185 occurrencesLate CretaceousPaleocene — about 21 of 185 occurrencesEocene — about 30 of 185 occurrencesEoceneOligocene — about 6 of 185 occurrencesMiocene — about 18 of 185 occurrencesPliocene — about 34 of 185 occurrencesPleistocene — about 21 of 185 occurrences242–234 Mya — about 5 occurrences234–226 Mya — about 1 occurrence201–193 Mya — about 4 occurrences193–185 Mya — about 8 occurrences185–177 Mya — about 1 occurrence169–161 Mya — about 2 occurrences161–153 Mya — about 1 occurrence153–145 Mya — about 0.7 occurrences145–137 Mya — about 0.4 occurrences137–129 Mya — about 4 occurrences129–121 Mya — about 1 occurrence121–113 Mya — about 3 occurrences113–105 Mya — about 3 occurrences105–97 Mya — about 5 occurrences97–89 Mya — about 2 occurrences89–81 Mya — about 1 occurrence81–73 Mya — about 2 occurrences73–64 Mya — about 7 occurrences64–56 Mya — about 16 occurrences56–48 Mya — about 2 occurrences48–40 Mya — about 15 occurrences40–32 Mya — about 14 occurrences32–24 Mya — about 4 occurrences24–16 Mya — about 12 occurrences16–8.1 Mya — about 5 occurrences8.1–0 Mya — about 64 occurrences233.6 Mya11.7 ka242 Mya0 Mya

185 occurrences of Emarginula on record, most of them in the Pliocene. 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

185 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

62 formations

Bowden — 17.88°N, 76.28°WCassian — 46.68°N, 12.15°ECassian — 46.57°N, 11.94°ECassian — 46.63°N, 12.21°ECassian — 46.55°N, 11.93°ECook Mountain — 31.25°N, 95.72°WCook Mountain — 30.62°N, 96.56°WCook Mountain — 30.64°N, 96.52°WCastle Hayne — 34.64°N, 77.65°WCastle Hayne — 34.23°N, 77.94°WCastle Hayne — 34.66°N, 77.70°WPerte du Rhône — 46.83°N, 6.52°ECalcaire de Mons — 50.45°N, 3.93°EAgatdal — 70.60°N, 53.05°WAgatdal — 70.60°N, 53.10°WDry Creek Sands — 34.91°S, 138.56°EDry Creek Sands — 34.95°S, 138.57°ETermofourà — 45.05°N, 7.80°EBayirkoy — 40.30°N, 29.99°EHückelhoven — 51.08°N, 6.32°ECalcaire de Vigny — 49.07°N, 1.92°ECzarnorzeki Beds — 49.77°N, 21.97°ECzarnorzeki Beds — 49.77°N, 21.93°Eopoka — 51.32°N, 21.95°ESable de Vauroux-Saint-Antoine — 48.43°N, 2.15°ESable de Vauroux-Saint-Antoine — 48.50°N, 2.25°EMare — 10.00°N, 64.00°WMare — 10.00°N, 71.00°WFels — 48.50°N, 15.76°ECalcare Massiccio — 43.37°N, 12.20°ERed Crag — 51.97°N, 1.35°ERed Crag — 51.85°N, 1.28°EHierlatz Limestone — 47.20°N, 17.87°EGosport Sand — 31.54°N, 87.52°WPakaurangi — 36.22°S, 174.28°EVuache — 46.83°N, 6.52°ESables a Nummulites variolarius — 49.25°N, 2.50°E

Loading coastlines…

The named rock units Emarginula has been recovered from, largest first. Drawn where the rock is now, not where it formed. 38 further formations hold fewer occurrences each and are not listed. 83 occurrences have no formation on record, which is common for older literature.

Emarginula and its relatives

Pliocene

Where Emarginula and its relatives were recorded in the Pliocene.

Found in the same rock

2,738 taxa

The Paleobiology Database records 100 sites for Emarginula, 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

84 references

Each of the 185 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. 72 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 content2

Picture of Emarginula

Credit
GrahamBould
Licence
Public Domain
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
Emarginula octaviana · NHMUK:zoo:20250011

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 itEmarginulinae through timeFormations of the PlioceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Lamarck 1801