Balanus improvisus

Amphibalanus improvisus, the bay barnacle, European acorn barnacle, is a species of acorn barnacle in the family Balanidae.

Balanus improvisus

Andrey Butko · CC BY-SA 3.0 · 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
BalanusPBDB
Diet
suspension feederPBDB, for Balanidae
Life habit
epifaunal, gregariousPBDB, for Balanidae
Motility
stationary, attached, epibiontPBDB, for Balanidae
Vision
limitedPBDB, for Cirripedia

Time the record covers

At least 22 million years on record.

The record covers at least 23.04 Mya to 129 ka. No occurrence read is dated outside 33.9 Mya to 11.7 ka.

Eocene — about 0 of 6 occurrencesOligocene — about 1 of 6 occurrencesOligoceneMiocene — about 3 of 6 occurrencesMiocenePliocene — about 0 of 6 occurrencesPleistocene — about 2 of 6 occurrences35–33 Mya — about 0.0 occurrences33–32 Mya — about 0.1 occurrences32–31 Mya — about 0.1 occurrences31–30 Mya — about 0.1 occurrences30–29 Mya — about 0.1 occurrences29–28 Mya — about 0.1 occurrences28–27 Mya — about 0.1 occurrences27–25 Mya — about 0.1 occurrences25–24 Mya — about 0.1 occurrences24–23 Mya — about 0.1 occurrences23–22 Mya — about 0.3 occurrences22–21 Mya — about 0.3 occurrences21–20 Mya — about 0.3 occurrences20–18 Mya — about 0.3 occurrences18–17 Mya — about 0.3 occurrences17–16 Mya — about 0.3 occurrences16–15 Mya — about 0.0 occurrences13–12 Mya — about 0.0 occurrences12–10 Mya — about 0.2 occurrences10–9.2 Mya — about 0.2 occurrences9.2–8.1 Mya — about 0.2 occurrences8.1–6.9 Mya — about 0.2 occurrences6.9–5.8 Mya — about 0.2 occurrences5.8–4.6 Mya — about 0.1 occurrences1.2–0 Mya — about 2 occurrences23.04 Mya129 ka34.6 Mya0 Mya

6 occurrences of Balanus improvisus 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

6 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

Pirabas — 1.05°S, 47.16°WPirabas — 1.15°S, 47.10°WAcredale — 36.79°N, 76.17°WGornji Grad — 46.28°N, 14.25°EChoctawhatchee — 30.49°N, 84.21°W

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The named rock units Balanus improvisus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 1 occurrence has no formation on record, which is common for older literature.

Balanus improvisus and its relatives

Miocene

Where Balanus improvisus and its relatives were recorded in the Miocene.

Found in the same rock

319 taxa

The Paleobiology Database records 5 sites for Balanus improvisus, 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

5 references

Each of the 6 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. Each entry links to the Paleobiology Database's own record for the work.

Media and terms

Media content1

Picture of Balanus improvisus

Credit
Andrey Butko
Licence
CC BY-SA 3.0
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 itBalanus through timeFormations of the MioceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Darwin 1854