Achatella

Achatella is a genus of trilobite in the order Phacopida, which existed in what is now Ontario, Canada. It was named by Delo in 1935, and the type species is Achatella achates, which was originally assigned to the genus Dalmanites by Billings in 1860. Achatella also contains the species Achatella billingsi, and Achatella truncatocaudata.

Achatella

Notafly · 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
PterygometopinaePBDB
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 13 million years on record.

The record covers at least 458.2 Mya to 445.2 Mya. No occurrence read is dated outside 471.3 Mya to 443.1 Mya.

Ordovician — about 38 of 38 occurrencesOrdovicianSilurian — about 0 of 38 occurrences472–471 Mya — about 0.0 occurrences471–470 Mya — about 0.1 occurrences470–469 Mya — about 0.1 occurrences469–468 Mya — about 0.1 occurrences468–467 Mya — about 0.1 occurrences467–466 Mya — about 0.1 occurrences466–465 Mya — about 0.1 occurrences465–464 Mya — about 0.1 occurrences464–463 Mya — about 0.1 occurrences463–462 Mya — about 0.1 occurrences462–461 Mya — about 0.1 occurrences461–460 Mya — about 0.4 occurrences460–459 Mya — about 0.7 occurrences459–458 Mya — about 1.0 occurrences458–457 Mya — about 3 occurrences457–456 Mya — about 2 occurrences456–455 Mya — about 1 occurrence455–454 Mya — about 1 occurrence454–453 Mya — about 2 occurrences453–452 Mya — about 3 occurrences452–451 Mya — about 3 occurrences451–450 Mya — about 6 occurrences450–449 Mya — about 6 occurrences449–448 Mya — about 2 occurrences448–447 Mya — about 1 occurrence447–446 Mya — about 1 occurrence446–445 Mya — about 1 occurrence445–444 Mya — about 1 occurrence444–444 Mya — about 2 occurrences444–443 Mya — about 0.7 occurrences458.2 Mya445.2 Mya471.9 Mya442.5 Mya

38 occurrences of Achatella 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

38 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

23 formations

Verulam — 44.52°N, 78.97°WVerulam — 44.43°N, 78.78°WVerulam — 44.48°N, 78.95°WKope — 39.00°N, 84.00°WKope — 38.43°N, 83.99°WFairview — 39.00°N, 84.00°WGrande Coupe — 48.54°N, 64.25°WBobcaygeon — 44.53°N, 78.55°WKnockerk — 53.75°N, 6.55°WKimmswick limestone — 39.05°N, 90.66°WKimmswick limestone — 38.32°N, 90.38°WCraighead — 55.25°N, 4.85°WViivikonna — 59.39°N, 27.36°EViivikonna — 59.35°N, 27.16°ERust — 43.28°N, 75.14°WHigh Mains — 55.78°N, 4.19°WPabos — 48.53°N, 64.29°WBellevue — 39.00°N, 84.00°WCorryville — 39.00°N, 84.00°WMount Auburn — 39.00°N, 84.00°WTanjiagou — 32.00°N, 106.00°EMartinsburg — 40.48°N, 76.53°WViivikonna — 59.44°N, 28.79°EMednikovo — 59.44°N, 28.79°EBoda Limestone — 61.05°N, 15.20°EShipshaw — 48.64°N, 71.20°WKilley Bridge — 54.60°N, 6.75°WBadger Flat — 36.95°N, 118.08°W

Loading coastlines…

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

Achatella and its relatives

Ordovician

Where Achatella and its relatives were recorded in the Ordovician.

Found in the same rock

639 taxa

The Paleobiology Database records 35 sites for Achatella, 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

17 references

Each of the 38 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. 5 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 Achatella

Credit
Notafly
Licence
CC BY-SA 3.0
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 itPterygometopinae through timeFormations of the OrdovicianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Delo 1935