Acastella

Acastella is an extinct genus of trilobite. The genus contains six species being A. herberti, A. jacquemonti, A. prima, A. roualti, A. tanzidensis and A. tiro.

Acastella

via GBIF · CC BY-NC 4.0 · via GBIF. 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
AcastidaePBDB
Diet
carnivorePBDB, for Phacopina
Life habit
low-level epifaunalPBDB, for Trilobita
Motility
fast-movingPBDB, for Trilobita
Vision
well-developedPBDB, for Acastidae
Environment
marinePBDB, for Trilobita

Time the record covers

At least 9.6 million years on record.

The record covers at least 422.7 Mya to 413.02 Mya. No occurrence read is dated outside 426.7 Mya to 393.47 Mya.

Silurian — about 15 of 112 occurrencesSilurianDevonian — about 97 of 112 occurrencesDevonian427–426 Mya — about 0.1 occurrences426–425 Mya — about 0.3 occurrences425–424 Mya — about 1 occurrence424–423 Mya — about 2 occurrences423–422 Mya — about 4 occurrences422–420 Mya — about 4 occurrences420–419 Mya — about 7 occurrences419–418 Mya — about 14 occurrences418–417 Mya — about 14 occurrences417–416 Mya — about 14 occurrences416–415 Mya — about 14 occurrences415–414 Mya — about 15 occurrences414–412 Mya — about 10 occurrences412–411 Mya — about 6 occurrences411–410 Mya — about 3 occurrences410–409 Mya — about 0.3 occurrences409–408 Mya — about 0.3 occurrences408–407 Mya — about 0.3 occurrences407–405 Mya — about 0.3 occurrences405–404 Mya — about 0.3 occurrences404–403 Mya — about 0.3 occurrences403–402 Mya — about 0.3 occurrences402–401 Mya — about 0.3 occurrences401–400 Mya — about 0.3 occurrences400–399 Mya — about 0.3 occurrences399–397 Mya — about 0.3 occurrences397–396 Mya — about 0.3 occurrences396–395 Mya — about 0.3 occurrences395–394 Mya — about 0.3 occurrences394–393 Mya — about 0.1 occurrences422.7 Mya413.02 Mya427.4 Mya392.8 Mya

112 occurrences of Acastella on record, most of them in the Devonian. 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

112 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

33 formations

Bostów — 50.90°N, 21.08°EBostów — 51.25°N, 21.57°EBostów — 50.47°N, 21.08°EKess Kess — 31.37°N, 7.30°WSaint-Cenere — 48.13°N, 0.78°WLuesma — 41.63°N, 0.88°WNogueras — 41.00°N, 1.00°WZeimlet — 29.52°N, 2.20°WZeimlet — 30.02°N, 2.08°WMitkov Suite — 48.57°N, 26.63°EMount Ida — 36.77°S, 144.77°EDzwinogorod Beds — 49.08°N, 25.40°ETajna Beds — 49.08°N, 25.40°ENoulette — 50.50°N, 2.50°EAtafaitafa — 23.77°N, 5.33°EBenyassin Sandstone — 28.75°N, 0.17°EOued Ali — 29.55°N, 2.13°WOued Ali — 29.75°N, 2.28°WKoudiat ed Diab — 32.65°N, 7.80°WKoudiat ed Diab — 32.65°N, 7.75°WLebanza — 43.00°N, 0.92°WBorshchov — 48.55°N, 26.22°EBorshchov — 48.60°N, 26.05°EWinnica — 50.82°N, 21.33°EFelmin — 43.00°N, 6.27°WCarazo — 42.98°N, 4.58°WLeintwardine — 52.37°N, 2.73°WPagegiai — 56.88°N, 21.18°EMitkov Beds — 49.02°N, 25.80°EZvenigorod suite — 48.55°N, 26.28°E

Loading coastlines…

The named rock units Acastella has been recovered from, largest first. Drawn where the rock is now, not where it formed. 9 further formations hold fewer occurrences each and are not listed. 32 occurrences have no formation on record, which is common for older literature.

Acastella and its relatives

Devonian

Where Acastella and its relatives were recorded in the Devonian.

Found in the same rock

475 taxa

The Paleobiology Database records 68 sites for Acastella, 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

27 references

Each of the 112 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. 15 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 Acastella

Source
GBIF
Credit
via GBIF
Licence
CC BY-NC 4.0
Commercial use
the licence does not allow 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 itAcastidae through timeFormations of the DevonianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Reed 1925)