Caecum

Caecum is a genus of minute sea snails, marine gastropod micromolluscs or micromollusks in the family Caecidae or blind shells.

Caecum

Jan Delsing · 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
CaecidaePBDB
Diet
grazerPBDB, for Caecidae
Life habit
epifaunalPBDB, for Caecidae
Motility
actively mobilePBDB, for Caecidae
Vision
limitedPBDB, for Gastropoda

Time the record covers

At least 61 million years on record.

The record covers at least 61.66 Mya to 11.7 ka. No occurrence read is dated outside 66 Mya to 0 Mya.

Late Cretaceous — about 0 of 249 occurrencesPaleocene — about 1 of 249 occurrencesPaleoceneEocene — about 10 of 249 occurrencesEoceneOligocene — about 3 of 249 occurrencesOligoceneMiocene — about 41 of 249 occurrencesMiocenePliocene — about 56 of 249 occurrencesPleistocene — about 129 of 249 occurrences67–65 Mya — about 0.2 occurrences65–63 Mya — about 0.5 occurrences63–61 Mya — about 0.3 occurrences56–54 Mya — about 0.5 occurrences54–52 Mya — about 0.6 occurrences52–49 Mya — about 0.6 occurrences49–47 Mya — about 0.3 occurrences43–40 Mya — about 1 occurrence40–38 Mya — about 4 occurrences38–36 Mya — about 2 occurrences36–34 Mya — about 1 occurrence34–31 Mya — about 0.9 occurrences31–29 Mya — about 0.9 occurrences29–27 Mya — about 0.7 occurrences25–22 Mya — about 0.9 occurrences22–20 Mya — about 4 occurrences20–18 Mya — about 6 occurrences18–16 Mya — about 6 occurrences16–13 Mya — about 4 occurrences13–11 Mya — about 8 occurrences11–9.0 Mya — about 5 occurrences9.0–6.7 Mya — about 5 occurrences6.7–4.5 Mya — about 9 occurrences4.5–2.2 Mya — about 60 occurrences2.2–0 Mya — about 128 occurrences61.66 Mya11.7 ka67 Mya0 Mya

249 occurrences of Caecum 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

249 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

63 formations

Unnamed — 33.24°N, 119.51°WUnnamed — 33.24°N, 119.55°WAgueguexquite — 17.58°N, 95.08°WAgueguexquite — 18.07°N, 94.32°WAgueguexquite — 18.14°N, 94.44°WCaloosahatchee — 26.89°N, 82.01°WCaloosahatchee — 26.96°N, 81.99°WCaloosahatchee — 27.77°N, 82.68°WMare — 10.00°N, 64.00°WMare — 10.00°N, 71.00°WMare — 10.61°N, 63.52°WMare — 10.64°N, 64.11°WBermont — 26.89°N, 82.01°WBermont — 27.72°N, 82.43°WSan Pedro Sand — 33.74°N, 118.28°WLomita Marl — 33.75°N, 118.30°WLomita Marl — 33.74°N, 118.29°WChipola — 30.57°N, 85.84°WChipola — 30.44°N, 85.19°WChipola — 30.43°N, 84.98°WPalos Verdes Sand — 33.99°N, 118.45°WPalos Verdes Sand — 33.60°N, 117.88°WPalos Verdes Sand — 33.74°N, 118.28°WPalos Verdes Sand — 33.80°N, 118.17°WWaccamaw — 34.33°N, 78.20°WWaccamaw — 34.21°N, 81.31°WWaccamaw — 33.63°N, 79.16°WShoal River — 30.72°N, 86.12°WGatun — 9.35°N, 79.83°WGatun — 9.36°N, 79.83°WGatun — 9.26°N, 79.92°WChowan RIver — 35.28°N, 76.65°WPalos Verdes — 33.63°N, 117.90°WStone City — 30.53°N, 96.69°WBowden — 17.88°N, 76.28°WJames City — 35.28°N, 76.65°WJackson Bluff — 30.43°N, 84.57°WSpringvale — 10.62°N, 61.05°WFalun de Saucats — 44.66°N, 0.57°WBerada — 51.10°N, 5.80°EFalmouth — 18.47°N, 77.45°WFort Thompson — 26.76°N, 81.44°WQuaternary terrace — 33.75°N, 118.33°WQuaternary terrace — 33.76°N, 118.35°W

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The named rock units Caecum has been recovered from, largest first. Drawn where the rock is now, not where it formed. 39 further formations hold fewer occurrences each and are not listed. 49 occurrences have no formation on record, which is common for older literature.

Caecum and its relatives

Pleistocene

Where Caecum and its relatives were recorded in the Pleistocene.

Found in the same rock

2,178 taxa

The Paleobiology Database records 106 sites for Caecum, 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

81 references

Each of the 249 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. 69 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 Caecum

Credit
Jan Delsing
Licence
Public Domain
Commercial use
the licence allows it

No 3D scan of Caecum 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.

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 itCaecidae through timeFormations of the PleistoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Fleming 1813