Chelicerata

The subphylum Chelicerata constitutes one of the two major living subdivisions of the phylum Arthropoda, alongside Mandibulata. Chelicerates include the sea spiders, horseshoe crabs, and arachnids, as well as a number of extinct lineages, such as the eurypterids and chasmataspidids.

Chelicerata

Ken-ichi Ueda Hans Hillewaert Luis Fernández García Lucarelli Bernard DUPONT Kurt Kulac · CC BY-SA 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
DeuteropodaPBDB
Motility
actively mobilePBDB, for Arthropoda

Time the record covers

At least 515 million years on record.

The record covers at least 516 Mya to 11.7 ka. No occurrence read is dated outside 538.8 Mya to 0 Mya.

Cambrian — about 33 of 4901 occurrencesCambrianOrdovician — about 33 of 4901 occurrencesSilurian — about 405 of 4901 occurrencesDevonian — about 271 of 4901 occurrencesDevonianCarboniferous — about 650 of 4901 occurrencesCarboniferousPermian — about 38 of 4901 occurrencesPermianEarly Triassic — about 11 of 4901 occurrencesMiddle Triassic — about 49 of 4901 occurrencesLate Triassic — about 14 of 4901 occurrencesEarly Jurassic — about 6 of 4901 occurrencesMiddle Jurassic — about 7 of 4901 occurrencesLate Jurassic — about 28 of 4901 occurrencesEarly Cretaceous — about 128 of 4901 occurrencesLate Cretaceous — about 699 of 4901 occurrencesPaleocene — about 3 of 4901 occurrencesEocene — about 1867 of 4901 occurrencesOligocene — about 47 of 4901 occurrencesMiocene — about 503 of 4901 occurrencesPliocene — about 16 of 4901 occurrencesPleistocene — about 12 of 4901 occurrences550–531 Mya — about 0.2 occurrences531–513 Mya — about 9 occurrences513–495 Mya — about 23 occurrences495–476 Mya — about 6 occurrences476–458 Mya — about 7 occurrences458–440 Mya — about 36 occurrences440–421 Mya — about 297 occurrences421–403 Mya — about 271 occurrences403–385 Mya — about 52 occurrences385–366 Mya — about 28 occurrences366–348 Mya — about 24 occurrences348–330 Mya — about 48 occurrences330–311 Mya — about 332 occurrences311–293 Mya — about 268 occurrences293–275 Mya — about 23 occurrences275–256 Mya — about 3 occurrences256–238 Mya — about 61 occurrences238–220 Mya — about 9 occurrences220–202 Mya — about 6 occurrences202–183 Mya — about 6 occurrences183–165 Mya — about 2 occurrences165–147 Mya — about 28 occurrences147–128 Mya — about 5 occurrences128–110 Mya — about 86 occurrences110–92 Mya — about 704 occurrences92–73 Mya — about 31 occurrences73–55 Mya — about 11 occurrences55–37 Mya — about 543 occurrences37–18 Mya — about 1565 occurrences18–0 Mya — about 416 occurrences516 Mya11.7 ka550 Mya0 Mya

4,901 occurrences of Chelicerata on record, most of them in the Eocene. 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

4,901 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

464 formations

Carbondale — 41.34°N, 88.39°WCarbondale — 41.24°N, 88.21°WCarbondale — 41.32°N, 88.25°WCarbondale — 40.52°N, 89.89°WCarbondale — 39.95°N, 87.65°WCarbondale — 41.00°N, 88.00°WFlorissant — 38.92°N, 105.28°WKladno — 50.10°N, 13.72°EKladno — 49.71°N, 13.21°EKladno — 49.86°N, 13.63°EKladno — 49.83°N, 14.59°EKladno — 50.24°N, 14.30°EKladno — 50.17°N, 14.09°EKladno — 49.85°N, 18.49°ECrato — 7.13°S, 39.70°WFiddlers Green — 42.85°N, 78.80°WFiddlers Green — 42.96°N, 75.06°WFiddlers Green — 42.96°N, 75.41°WNiveau du gypse d'Aix — 43.52°N, 5.45°EPanther Mountain — 42.43°N, 74.43°WShanwang — 36.55°N, 118.71°EShawangunk — 40.98°N, 75.14°WShawangunk — 41.47°N, 74.54°WReservoir — 56.00°N, 3.00°WReservoir — 55.81°N, 3.35°WBertie — 42.93°N, 75.12°WBertie — 43.45°N, 74.95°WBertie — 43.00°N, 78.07°WBertie — 42.88°N, 78.88°WBertie — 43.05°N, 76.15°WSundvollen — 60.17°N, 10.30°ESundvollen — 59.92°N, 10.75°EGrès à Voltzia — 48.83°N, 7.24°EGrès à Voltzia — 48.72°N, 7.17°EGrès à Voltzia — 48.91°N, 7.20°EGrès à Voltzia — 48.69°N, 7.38°EGrès à Voltzia — 48.78°N, 7.25°EGrès à Voltzia — 48.64°N, 7.45°EGrès à Voltzia — 48.53°N, 7.43°EGrès à Voltzia — 48.64°N, 7.44°EBarstow — 34.95°N, 116.83°WBarstow — 34.94°N, 116.83°WPozary — 49.93°N, 14.18°EPozary — 50.08°N, 14.47°EPozary — 49.90°N, 14.02°EPozary — 49.52°N, 13.50°EEscucha — 40.80°N, 0.81°WEscucha — 42.64°N, 2.72°WEscucha — 41.03°N, 0.56°WDryden Flags — 57.34°N, 2.84°WDryden Flags — 57.34°N, 2.85°WMazantic Shale — 17.15°N, 92.70°WDaohugou — 41.32°N, 119.24°EDownton Castle Sandstone — 51.37°N, 2.73°WDownton Castle Sandstone — 52.37°N, 2.73°WDownton Castle Sandstone — 52.43°N, 2.81°WSyracuse — 43.05°N, 76.15°WSyracuse — 43.07°N, 76.08°WSyracuse — 43.05°N, 76.00°WSyracuse — 43.07°N, 76.33°WSyracuse — 43.05°N, 76.15°WRaritan — 40.47°N, 74.32°WVernon Shale — 43.08°N, 77.52°WTemeside Shale — 52.37°N, 2.73°W

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The named rock units Chelicerata has been recovered from, largest first. Drawn where the rock is now, not where it formed. 440 further formations hold fewer occurrences each and are not listed. 3,332 occurrences have no formation on record, which is common for older literature.

Chelicerata and its relatives

Eocene

Where Chelicerata and its relatives were recorded in the Eocene.

Found in the same rock

3,608 taxa

The Paleobiology Database records at least 483 sites for Chelicerata, and this reads 240 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

1,043 references

Each of the 4,901 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. 1,031 further references are not listed. Each entry links to the Paleobiology Database's own record for the work.

Media and terms

Media content2

Picture of Chelicerata

Credit
Ken-ichi Ueda Hans Hillewaert Luis Fernández García Lucarelli Bernard DUPONT Kurt Kulac
Licence
CC BY-SA 4.0
Commercial use
the licence allows it

3D model

Source
Sketchfab
Licence
CC Attribution-ShareAlike
Commercial use
cannot be read from the licence given — check the record

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 itDeuteropoda through timeFormations of the EoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Heymons 1901