Coeloma

Coeloma is an extinct genus of crabs belonging to the family Geryonidae or Mathildellidae. The genus includes 17 species, formerly distributed among several subgenera. The fossil record of the genus extends from the Thanetian to the Pliocene.

Coeloma

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
Sits inside
PolybiinaePBDB
Diet
carnivorePBDB, for Decapoda
Life habit
semi-infaunalPBDB, for Portunoidea
Motility
actively mobilePBDB, for Malacostraca
Vision
well-developedPBDB, for Malacostraca

Time the record covers

At least 50 million years on record.

The record covers at least 56 Mya to 5.333 Mya. No occurrence read is dated outside 59.24 Mya to 2.58 Mya.

Paleocene — about 1 of 19 occurrencesEocene — about 8 of 19 occurrencesEoceneOligocene — about 8 of 19 occurrencesOligoceneMiocene — about 0 of 19 occurrencesPliocene — about 2 of 19 occurrencesPleistocene — about 0 of 19 occurrences60–58 Mya — about 0.3 occurrences58–56 Mya — about 0.6 occurrences56–54 Mya — about 1.0 occurrences54–53 Mya — about 1 occurrence53–51 Mya — about 1 occurrence51–49 Mya — about 1 occurrence49–47 Mya — about 0.6 occurrences47–45 Mya — about 0.4 occurrences45–43 Mya — about 0.4 occurrences43–41 Mya — about 0.5 occurrences41–39 Mya — about 1.0 occurrences39–37 Mya — about 0.7 occurrences37–35 Mya — about 0.4 occurrences35–33 Mya — about 1 occurrence33–31 Mya — about 2 occurrences31–29 Mya — about 2 occurrences29–27 Mya — about 2 occurrences27–25 Mya — about 0.5 occurrences25–23 Mya — about 0.5 occurrences23–21 Mya — about 0.0 occurrences5.4–3.4 Mya — about 1 occurrence3.4–1.4 Mya — about 0.6 occurrences56 Mya5.333 Mya60 Mya1 Mya

19 occurrences of Coeloma on record, most of them in the Eocene. 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

19 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

5 formations

Bilzen — 50.85°N, 5.63°ETukwila — 47.48°N, 122.25°WGehlberg — 52.22°N, 11.01°ERoda — 42.44°N, 0.27°EBoom — 51.12°N, 4.36°E

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The named rock units Coeloma has been recovered from, largest first. Drawn where the rock is now, not where it formed. 14 occurrences have no formation on record, which is common for older literature.

Coeloma and its relatives

Eocene

Where Coeloma and its relatives were recorded in the Eocene.

Found in the same rock

472 taxa

The Paleobiology Database records 16 sites for Coeloma, 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

16 references

Each of the 19 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. 4 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 Coeloma

Credit
Hectonichus
Licence
CC BY-SA 3.0
Commercial use
the licence allows it

No 3D scan of Coeloma 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 itPolybiinae through timeFormations of the EoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Milne-Edwards 1865