Arbacia improcera

Arbacia improcera

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
ArbaciaPBDB
Diet
grazerPBDB, for Arbaciidae
Life habit
epifaunalPBDB, for Arbaciidae
Motility
actively mobilePBDB, for Arbaciidae
Vision
limitedPBDB, for Echinoidea
Environment
marinePBDB, for Echinodermata

Time the record covers

At most 4.6 million years on record.

Every occurrence read is dated to somewhere between 5.333 Mya and 774 ka, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Miocene — about 0 of 5 occurrencesPliocene — about 4 of 5 occurrencesPliocenePleistocene — about 1 of 5 occurrencesPleistocene5.5–5.3 Mya — about 0.1 occurrences5.3–5.1 Mya — about 0.4 occurrences5.1–4.9 Mya — about 0.4 occurrences4.9–4.7 Mya — about 0.4 occurrences4.7–4.5 Mya — about 0.4 occurrences4.5–4.4 Mya — about 0.4 occurrences4.4–4.2 Mya — about 0.4 occurrences4.2–4.0 Mya — about 0.4 occurrences4.0–3.8 Mya — about 0.4 occurrences3.8–3.6 Mya — about 0.4 occurrences3.6–3.4 Mya — about 0.1 occurrences3.4–3.2 Mya — about 0.1 occurrences3.2–3.1 Mya — about 0.1 occurrences3.1–2.9 Mya — about 0.1 occurrences2.9–2.7 Mya — about 0.1 occurrences2.7–2.5 Mya — about 0.1 occurrences2.5–2.3 Mya — about 0.1 occurrences2.3–2.1 Mya — about 0.1 occurrences2.1–1.9 Mya — about 0.1 occurrences1.9–1.8 Mya — about 0.1 occurrences1.8–1.6 Mya — about 0.1 occurrences1.6–1.4 Mya — about 0.1 occurrences1.4–1.2 Mya — about 0.1 occurrences1.2–1.0 Mya — about 0.1 occurrences1.0–830 ka Mya — about 0.1 occurrences830 ka–645 ka Mya — about 0.0 occurrences5.8 Mya274 ka

5 occurrences of Arbacia improcera on record, most of them in the Pliocene. 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

5 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

3 formations

Yorktown — 35.36°N, 76.82°WYorktown — 37.03°N, 76.60°WYorktown — 37.06°N, 76.33°WGoose Creek — 33.33°N, 80.15°WCroatan — 35.36°N, 76.82°W

Loading coastlines…

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

Arbacia improcera and its relatives

Pliocene

Where Arbacia improcera and its relatives were recorded in the Pliocene.

Found in the same rock

552 taxa

The Paleobiology Database records 5 sites for Arbacia improcera, 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

3 references

Each of the 5 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. 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 Arbacia improcera

Source
iDigBio
Credit
via iDigBio
Licence
CC0
Commercial use
the licence allows 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 itArbacia through timeFormations of the PlioceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Conrad 1843)