Chasmops

Chasmops is a trilobite in the order Phacopida that existed during the upper Ordovician in what is now Estonia. It was described by McCoy in 1849, and the type species is Chasmops odini, which was originally described under the genus Calymene by Eichwald in 1840. It also contains the species C. maxima.

Chasmops

Dr. Michael Sturm · 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
ChasmopinaePBDB
Diet
carnivorePBDB, for Phacopina
Life habit
low-level epifaunalPBDB, for Trilobita
Motility
fast-movingPBDB, for Trilobita
Vision
well-developedPBDB, for Pterygometopidae
Environment
marinePBDB, for Trilobita

Time the record covers

At least 12 million years on record.

The record covers at least 461.4 Mya to 449.2 Mya. No occurrence read is dated outside 464.3 Mya to 443.1 Mya.

Ordovician — about 110 of 110 occurrencesOrdovicianSilurian — about 0 of 110 occurrences465–464 Mya — about 0.1 occurrences464–463 Mya — about 0.3 occurrences463–463 Mya — about 0.3 occurrences463–462 Mya — about 0.3 occurrences462–461 Mya — about 0.3 occurrences461–460 Mya — about 0.9 occurrences460–460 Mya — about 1 occurrence460–459 Mya — about 2 occurrences459–458 Mya — about 2 occurrences458–457 Mya — about 7 occurrences457–457 Mya — about 6 occurrences457–456 Mya — about 4 occurrences456–455 Mya — about 4 occurrences455–454 Mya — about 4 occurrences454–454 Mya — about 4 occurrences454–453 Mya — about 6 occurrences453–452 Mya — about 14 occurrences452–451 Mya — about 14 occurrences451–451 Mya — about 12 occurrences451–450 Mya — about 11 occurrences450–449 Mya — about 3 occurrences449–449 Mya — about 10 occurrences449–448 Mya — about 0.9 occurrences448–447 Mya — about 0.9 occurrences447–446 Mya — about 0.9 occurrences446–446 Mya — about 0.9 occurrences446–445 Mya — about 0.4 occurrences445–444 Mya — about 0.2 occurrences444–443 Mya — about 0.2 occurrences443–443 Mya — about 0.1 occurrences461.4 Mya449.2 Mya464.8 Mya442.6 Mya

110 occurrences of Chasmops 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

110 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

50 formations

Khrevitsa — 59.60°N, 29.52°EKhrevitsa — 59.61°N, 30.23°EKhrevitsa — 59.27°N, 28.84°EGorayivskaya — 48.57°N, 27.03°EWhittaker — 62.00°N, 127.00°WWhittaker — 61.52°N, 124.87°WWhittaker — 62.47°N, 124.85°WWhittaker — 63.28°N, 125.35°WWhittaker — 61.48°N, 125.05°WKirkley Bank — 54.43°N, 2.78°WKirkley Bank — 54.43°N, 2.88°WDalby — 57.00°N, 17.00°EDalby — 61.00°N, 15.00°EDalby — 58.00°N, 14.00°EDalby — 58.00°N, 12.00°ENakkholmen — 61.33°N, 8.80°ENakkholmen — 59.90°N, 10.63°ENakkholmen — 59.84°N, 10.54°EViivikonna — 59.70°N, 29.67°EViivikonna — 59.44°N, 28.79°EViivikonna — 59.66°N, 29.57°EGryazno — 59.66°N, 29.57°EJakšiai — 55.57°N, 26.65°EStile End — 54.43°N, 2.78°WGelli-Grin — 53.00°N, 4.00°WVaureal — 49.82°N, 64.35°WBobcaygeon — 44.53°N, 78.55°WJakšiai — 54.47°N, 24.62°EJakšiai — 55.60°N, 26.47°EJaksiai — 55.67°N, 25.38°EJaksiai — 55.55°N, 24.10°EAlvitas — 55.55°N, 24.10°ESakiai — 55.55°N, 24.10°ESubica — 48.58°N, 26.82°ELiberty — 39.00°N, 84.00°WWhitewater — 39.00°N, 84.00°WFolkeslunda — 57.00°N, 17.00°ESkagen Limestone — 58.00°N, 14.00°EVollen — 60.00°N, 11.00°ENod Glas — 53.00°N, 4.00°W

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The named rock units Chasmops has been recovered from, largest first. Drawn where the rock is now, not where it formed. 26 further formations hold fewer occurrences each and are not listed. 15 occurrences have no formation on record, which is common for older literature.

Chasmops and its relatives

Ordovician

Where Chasmops and its relatives were recorded in the Ordovician.

Found in the same rock

930 taxa

The Paleobiology Database records 87 sites for Chasmops, 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

30 references

Each of the 110 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. 18 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 Chasmops

Credit
Dr. Michael Sturm
Licence
Public Domain
Commercial use
the licence allows it

No 3D scan was found. Smithsonian Open Access, MorphoSource and Sketchfab were all searched.

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 itChasmopinae through timeFormations of the OrdovicianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. M'Coy 1849