Agassizia

Agassizia is a genus of sea urchin of the family Prenasteridae. The species was first scientifically described in 1869 by Achille Valenciennes.

Agassizia

RECOLNAT (ANR-11-INBS-0004) - Marie HENNION - 2016 · CC BY 4.0 · 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
SchizasteridaePBDB
Diet
deposit feeder, detritivorePBDB, for Spatangoida
Life habit
shallow infaunalPBDB, for Spatangoida
Motility
slow-movingPBDB, for Spatangoida
Vision
limitedPBDB, for Echinoidea
Environment
marinePBDB, for Spatangoida

Time the record covers

At least 35 million years on record.

The record covers at least 37.71 Mya to 2.58 Mya. No occurrence read is dated outside 48.07 Mya to 774 ka.

Eocene — about 14 of 38 occurrencesEoceneOligocene — about 14 of 38 occurrencesOligoceneMiocene — about 4 of 38 occurrencesMiocenePliocene — about 3 of 38 occurrencesPleistocene — about 3 of 38 occurrences49–47 Mya — about 0.1 occurrences47–46 Mya — about 0.2 occurrences46–44 Mya — about 0.2 occurrences44–42 Mya — about 0.2 occurrences42–41 Mya — about 0.5 occurrences41–39 Mya — about 4 occurrences39–38 Mya — about 4 occurrences38–36 Mya — about 3 occurrences36–34 Mya — about 3 occurrences34–33 Mya — about 2 occurrences33–31 Mya — about 2 occurrences31–29 Mya — about 2 occurrences29–28 Mya — about 2 occurrences28–26 Mya — about 2 occurrences26–25 Mya — about 2 occurrences25–23 Mya — about 2 occurrences23–21 Mya — about 0.6 occurrences21–20 Mya — about 0.8 occurrences20–18 Mya — about 0.9 occurrences18–16 Mya — about 0.8 occurrences16–15 Mya — about 0.3 occurrences15–13 Mya — about 0.2 occurrences13–11 Mya — about 0.2 occurrences11–9.8 Mya — about 0.1 occurrences9.8–8.2 Mya — about 0.1 occurrences8.2–6.5 Mya — about 0.1 occurrences6.5–4.9 Mya — about 0.6 occurrences4.9–3.3 Mya — about 2 occurrences3.3–1.6 Mya — about 2 occurrences1.6–0 Mya — about 1 occurrence37.71 Mya2.58 Mya49 Mya0 Mya

38 occurrences of Agassizia on record, most of them in the Eocene. The Paleobiology Database records this as a living group, and the chart stops with its fossils rather than at the present. 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

22 formations

Castle Hayne — 34.64°N, 77.65°WCastle Hayne — 34.37°N, 77.86°WCastle Hayne — 34.23°N, 77.94°WCrystal River Limestone — 30.05°N, 83.18°WCrystal River Limestone — 28.93°N, 82.70°WCrystal River Limestone — 28.90°N, 82.59°WSuwannee Limestone — 29.33°N, 83.14°WSuwannee Limestone — 28.56°N, 82.39°WMoneague — 18.03°N, 77.45°WInglis Limestone — 29.03°N, 82.67°WRiver Bend — 35.15°N, 77.14°WRiver Bend — 34.89°N, 77.23°WSantee Limestone — 33.33°N, 79.69°WBridgeboro Limestone — 30.78°N, 85.23°WArcadia — 27.22°N, 81.86°WCaloosahatchee — 26.52°N, 82.03°WTamiami — 26.13°N, 81.48°WMaadi — 29.00°N, 30.00°EAvon Park — 29.01°N, 82.65°WOcala — 30.92°N, 84.56°WCroatan — 35.36°N, 76.82°WAnahuac — 29.28°N, 95.73°WPirabas — 1.05°S, 47.16°WSan Marcos — 27.07°N, 111.98°WMesón — 24.20°N, 98.23°WWaccamaw — 32.98°N, 79.89°WChickasawhay — 31.65°N, 88.53°WDam — 24.68°N, 50.87°E

Loading coastlines…

The named rock units Agassizia has been recovered from, largest first. Drawn where the rock is now, not where it formed. 6 occurrences have no formation on record, which is common for older literature.

Agassizia and its relatives

Eocene

Where Agassizia and its relatives were recorded in the Eocene.

Found in the same rock

638 taxa

The Paleobiology Database records 37 sites for Agassizia, 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

21 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. 9 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 Agassizia

Credit
RECOLNAT (ANR-11-INBS-0004) - Marie HENNION - 2016
Licence
CC BY 4.0
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 itSchizasteridae through timeFormations of the EoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Valenciennes 1846