Metacrinus

Metacrinus is a genus of stalked crinoids in the family Isocrinidae. Members of this genus live on hard surfaces in deeper parts of the ocean. The genus has extant species and is also represented in the fossil record. Members of the genus grow to a maximum height of 60 centimetres (24 in) and are found in the eastern Pacific Ocean from Japan to Australia.

Metacrinus

Ernst Haeckel · 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
MetacrininaePBDB
Diet
suspension feederPBDB, for Isselicrinidae
Life habit
upper-level epifaunalPBDB, for Isselicrinidae
Motility
stationary, attachedPBDB, for Isselicrinidae
Vision
blindPBDB, for Crinoidea
Environment
marinePBDB, for Echinodermata

Time the record covers

At least 51 million years on record.

The record covers at least 59.24 Mya to 7.246 Mya. No occurrence read is dated outside 61.66 Mya to 5.333 Mya.

Paleocene — about 1 of 15 occurrencesPaleoceneEocene — about 13 of 15 occurrencesEoceneOligocene — about 0 of 15 occurrencesMiocene — about 1 of 15 occurrencesMiocenePliocene — about 0 of 15 occurrences63–61 Mya — about 0.3 occurrences61–59 Mya — about 0.7 occurrences57–55 Mya — about 0.3 occurrences55–53 Mya — about 0.5 occurrences53–51 Mya — about 0.5 occurrences51–49 Mya — about 0.5 occurrences49–47 Mya — about 0.6 occurrences47–45 Mya — about 0.7 occurrences45–43 Mya — about 0.7 occurrences43–41 Mya — about 0.7 occurrences41–39 Mya — about 0.5 occurrences39–37 Mya — about 1.0 occurrences37–35 Mya — about 4 occurrences35–33 Mya — about 3 occurrences8.1–6.2 Mya — about 0.6 occurrences6.2–4.2 Mya — about 0.4 occurrences59.24 Mya7.246 Mya63 Mya4 Mya

15 occurrences of Metacrinus 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

15 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

4 formations

La Meseta — 64.23°S, 56.61°WLa Meseta — 64.24°S, 56.66°WLa Meseta — 64.25°S, 56.61°WLa Meseta — 64.26°S, 56.68°WBrèches rouges de Carboneras — 37.60°N, 1.32°WKauru — 45.06°S, 170.75°ESubmeseta — 64.24°S, 56.63°W

Loading coastlines…

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

Metacrinus and its relatives

Eocene

Where Metacrinus and its relatives were recorded in the Eocene.

Found in the same rock

118 taxa

The Paleobiology Database records 14 sites for Metacrinus, 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

4 references

Each of the 15 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. 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 Metacrinus

Credit
Ernst Haeckel
Licence
Public Domain
Commercial use
the licence allows it

No 3D scan of Metacrinus was found in MorphoSource and Sketchfab.

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 itMetacrininae through timeFormations of the EoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Carpenter 1882