Astrononion

Astrononion is a genus of foraminiferans in the family Astrononionidae, characterized by an evolute planispiral test with radially stellate structures partly covering the sutures on either side. The test is free, bilaterally symmetrical; periphery broadly rounded; chambers distinct, separated by depressed radial sutures, increasing gradually in size, and usually inflated; aperture a low arched opening at the base of the face of the test. The wall is of finely perforate monolamellar granular calcite.

Astrononion

via iDigBio · CC0 · 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
NonionidaePBDB
Diet
omnivorePBDB, for Foraminifera
Life habit
semi-infaunalPBDB, for Foraminifera
Motility
stationaryPBDB, for Foraminifera

Time the record covers

At least 41 million years on record.

The record covers at least 41.03 Mya to 11.7 ka. No occurrence read is dated outside 48.07 Mya to 0 Mya.

Eocene — about 11 of 530 occurrencesEoceneOligocene — about 67 of 530 occurrencesOligoceneMiocene — about 178 of 530 occurrencesMiocenePliocene — about 146 of 530 occurrencesPleistocene — about 126 of 530 occurrences49–47 Mya — about 0.3 occurrences47–46 Mya — about 0.7 occurrences46–44 Mya — about 0.7 occurrences44–42 Mya — about 0.7 occurrences42–41 Mya — about 0.7 occurrences41–39 Mya — about 0.5 occurrences39–38 Mya — about 0.7 occurrences38–36 Mya — about 3 occurrences36–34 Mya — about 3 occurrences34–33 Mya — about 7 occurrences33–31 Mya — about 9 occurrences31–29 Mya — about 9 occurrences29–28 Mya — about 9 occurrences28–26 Mya — about 11 occurrences26–25 Mya — about 12 occurrences25–23 Mya — about 13 occurrences23–21 Mya — about 19 occurrences21–20 Mya — about 18 occurrences20–18 Mya — about 16 occurrences18–16 Mya — about 16 occurrences16–15 Mya — about 19 occurrences15–13 Mya — about 18 occurrences13–11 Mya — about 15 occurrences11–9.8 Mya — about 15 occurrences9.8–8.2 Mya — about 15 occurrences8.2–6.5 Mya — about 15 occurrences6.5–4.9 Mya — about 34 occurrences4.9–3.3 Mya — about 87 occurrences3.3–1.6 Mya — about 74 occurrences1.6–0 Mya — about 91 occurrences41.03 Mya11.7 ka49 Mya0 Mya

530 occurrences of Astrononion on record, most of them in the Miocene. 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

530 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

4 formations

Okhonchevayamskaya — 60.42°N, 165.92°EPakhachinskaya — 60.42°N, 165.92°EIhungia — 40.30°S, 176.28°EAlzey — 49.83°N, 7.72°E

Loading coastlines…

The named rock units Astrononion has been recovered from, largest first. Drawn where the rock is now, not where it formed. 525 occurrences have no formation on record, which is common for older literature.

Astrononion and its relatives

Miocene

Where Astrononion and its relatives were recorded in the Miocene.

Found in the same rock

443 taxa

The Paleobiology Database records 515 sites for Astrononion, 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

36 references

Each of the 530 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. 24 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 Astrononion

Source
iDigBio
Credit
via iDigBio
Licence
CC0
Commercial use
the licence allows it

No 3D scan of Astrononion was found in MorphoSource and Sketchfab.

Smithsonian Open Access was 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 itNonionidae through timeFormations of the MioceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Cushman and Edwards 1927