Mitrata

Mitrates are an extinct group of echinoderms, which are grouped with the cornutes and the basal Ceratocystis to form the Stylophora. Mitrates were central to the now-disproven calcichordate hypothesis of chordate origins, but are now seen as either pre-radial-symmetry stem-group echinoderms, or as a derived group either within the blastozoans or near to the origin of crinoids.

Mitrata

Marcellor Ruta · CC BY 4.0 · 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
StylophoraPBDB
Diet
suspension feederPBDB
Life habit
epifaunalPBDB
Motility
passively mobilePBDB
Vision
blindPBDB, for Stylophora
Environment
marinePBDB, for Echinodermata

Time the record covers

At least 173 million years on record.

The record covers at least 497 Mya to 323.4 Mya. No occurrence read is dated outside 500.5 Mya to 318.6 Mya.

Cambrian — about 1 of 145 occurrencesCambrianOrdovician — about 100 of 145 occurrencesOrdovicianSilurian — about 11 of 145 occurrencesSilurianDevonian — about 32 of 145 occurrencesDevonianCarboniferous — about 1 of 145 occurrencesCarboniferous504–498 Mya — about 0.8 occurrences498–492 Mya — about 0.2 occurrences492–485 Mya — about 0.2 occurrences485–479 Mya — about 2 occurrences479–473 Mya — about 11 occurrences473–466 Mya — about 12 occurrences466–460 Mya — about 19 occurrences460–454 Mya — about 21 occurrences454–447 Mya — about 24 occurrences447–441 Mya — about 13 occurrences441–435 Mya — about 1 occurrence435–428 Mya — about 2 occurrences428–422 Mya — about 5 occurrences422–416 Mya — about 4 occurrences416–410 Mya — about 4 occurrences410–403 Mya — about 7 occurrences403–397 Mya — about 6 occurrences397–391 Mya — about 5 occurrences391–384 Mya — about 4 occurrences384–378 Mya — about 1 occurrence378–372 Mya — about 0.3 occurrences372–365 Mya — about 0.3 occurrences365–359 Mya — about 0.3 occurrences359–353 Mya — about 0.0 occurrences328–321 Mya — about 0.4 occurrences321–315 Mya — about 0.6 occurrences497 Mya323.4 Mya504 Mya315 Mya

145 occurrences of Mitrata on record, most of them in the Ordovician. 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

145 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

66 formations

Sarka — 50.00°N, 14.00°ESarka — 49.77°N, 13.62°ESarka — 50.12°N, 14.38°ESarka — 50.01°N, 14.46°EPonta Grossa — 26.07°S, 52.58°WPonta Grossa — 25.08°S, 50.15°WPonta Grossa — 25.43°S, 50.40°WPonta Grossa — 24.50°S, 50.40°WPontyfenni — 52.00°N, 5.00°WBromide — 34.00°N, 97.00°WBromide — 34.07°N, 97.17°WBromide — 34.03°N, 97.17°WGydo — 33.30°S, 21.83°EGydo — 33.33°S, 19.37°EGydo — 32.18°S, 18.90°ENavas de Estena — 39.00°N, 4.00°WNavas de Estena — 39.52°N, 4.28°WUpper Fezouata — 27.82°N, 11.40°WUpper Fezouata — 30.55°N, 5.68°WLiben — 50.00°N, 14.00°ELiben — 49.72°N, 13.57°EKraluv Dvur — 50.00°N, 14.00°EKraluv Dvur — 49.87°N, 14.00°ESaint-Chinian — 43.44°N, 2.89°EHunsrück Slate — 49.89°N, 7.47°EHunsrück Slate — 49.83°N, 7.37°EPonta Grossa Shale — 7.00°S, 38.00°WIzegguirene — 30.57°N, 5.99°WSlade and Redhill Mudstone — 51.80°N, 4.55°WSlade and Redhill Mudstone — 51.79°N, 4.54°WLetna — 50.00°N, 14.00°EVinice — 50.00°N, 14.00°EZahorany — 50.00°N, 14.00°EBrainard — 42.94°N, 91.71°WDecorah Shale — 44.00°N, 92.00°WGuttenberg — 42.00°N, 90.50°WIon — 42.00°N, 90.50°WScales — 37.23°N, 89.47°WVoorstehoek — 33.50°S, 19.82°EVoorstehoek — 33.36°S, 19.51°ETalacasto — 30.50°S, 68.50°W

Loading coastlines…

The named rock units Mitrata has been recovered from, largest first. Drawn where the rock is now, not where it formed. 42 further formations hold fewer occurrences each and are not listed. 8 occurrences have no formation on record, which is common for older literature.

Mitrata and its relatives

Ordovician

Where Mitrata and its relatives were recorded in the Ordovician.

Found in the same rock

2,051 taxa

The Paleobiology Database records 111 sites for Mitrata, 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

55 references

Each of the 145 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. 43 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 Mitrata

Credit
Marcellor Ruta
Licence
CC BY 4.0
Commercial use
the licence allows it

No 3D scan of Mitrata 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 itStylophora through timeFormations of the OrdovicianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Jaekel 1918