Aechmina

Aechmina

via iDigBio · CC BY-NC-SA · via iDigBio. 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
AechminidaePBDB
Diet
suspension feederPBDB, for Palaeocopida
Life habit
epifaunalPBDB, for Palaeocopida
Motility
actively mobilePBDB, for Ostracoda
Vision
limitedPBDB, for Ostracoda
Environment
marinePBDB, for Ostracoda

Time the record covers

At least 181 million years on record.

The record covers at least 471.3 Mya to 290.1 Mya. No occurrence read is dated outside 477.1 Mya to 283.3 Mya.

Ordovician — about 29 of 85 occurrencesOrdovicianSilurian — about 12 of 85 occurrencesSilurianDevonian — about 14 of 85 occurrencesDevonianCarboniferous — about 1 of 85 occurrencesCarboniferousPermian — about 29 of 85 occurrencesPermian481–474 Mya — about 0.5 occurrences474–468 Mya — about 0.6 occurrences468–461 Mya — about 0.9 occurrences461–454 Mya — about 7 occurrences454–447 Mya — about 17 occurrences447–441 Mya — about 3 occurrences441–434 Mya — about 2 occurrences434–427 Mya — about 1 occurrence427–421 Mya — about 7 occurrences421–414 Mya — about 6 occurrences414–407 Mya — about 0.7 occurrences407–400 Mya — about 0.3 occurrences400–394 Mya — about 0.3 occurrences394–387 Mya — about 5 occurrences387–380 Mya — about 2 occurrences373–367 Mya — about 1 occurrence313–306 Mya — about 1.0 occurrences306–300 Mya — about 0.0 occurrences300–293 Mya — about 5 occurrences293–286 Mya — about 23 occurrences286–279 Mya — about 0.4 occurrences471.3 Mya290.1 Mya481 Mya279 Mya

85 occurrences of Aechmina 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

85 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

31 formations

Holmwood — 28.94°S, 115.54°EDelaware — 39.97°N, 83.00°WFort Atkinson Limestone — 42.00°N, 94.00°WBrainard Shale — 42.00°N, 94.00°WIon — 42.00°N, 94.00°WColumbus — 39.97°N, 83.00°WJoslin Hill — 43.21°N, 75.46°WHenryhouse — 35.08°N, 98.24°WBohdalec — 50.00°N, 14.00°EArnheim — 39.00°N, 84.00°WCosterfield Siltstone — 34.08°S, 151.02°EHuangnigang — 28.00°N, 118.00°EYanwashan — 28.00°N, 118.00°EOnondaga — 40.60°N, 77.57°WSkala — 49.58°N, 23.90°EPozary — 49.95°N, 12.93°EDecorah Shale — 46.00°N, 94.00°WCummingsville — 46.00°N, 94.00°WMaquoketa — 46.00°N, 94.00°WGuttenberg — 42.00°N, 94.00°WDunleith — 42.00°N, 94.00°WMitkov Suite — 48.57°N, 26.63°ERoad River — 62.40°N, 127.50°WSueve Shale — 43.47°N, 5.06°W

Loading coastlines…

The named rock units Aechmina has been recovered from, largest first. Drawn where the rock is now, not where it formed. 7 further formations hold fewer occurrences each and are not listed. 18 occurrences have no formation on record, which is common for older literature.

Aechmina and its relatives

Ordovician

Where Aechmina and its relatives were recorded in the Ordovician.

Found in the same rock

788 taxa

The Paleobiology Database records 74 sites for Aechmina, 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

28 references

Each of the 85 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. 16 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 Aechmina

Source
iDigBio
Credit
via iDigBio
Licence
CC BY-NC-SA
Commercial use
the licence does not allow it

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

This is what the site found, which is not the same as what exists.

Keep going

What may have been alongside itAechminidae through timeFormations of the OrdovicianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Jones and Holl 1869