Barbatia (Calloarca) irregularis
Searched as Barbatia irregularis. The Paleobiology Database treats Barbatia (Calloarca) irregularis as the accepted name.

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
- CalloarcaPBDB
- Diet
- suspension feederPBDB, for Calloarca
- Life habit
- epifaunalPBDB, for Calloarca
- Motility
- stationary, attachedPBDB, for Calloarca
- Vision
- limitedPBDB, for Arcidae
- Environment
- lagoonal,coastal,inner shelf,outer shelf,oceanic,brackish,freshwaterPBDB, for Arcidae
Time the record covers
At least 38 million years on record.
The record covers at least 41.03 Mya to 2.58 Mya. No occurrence read is dated outside 48.07 Mya to 774 ka.
5 occurrences of Barbatia (Calloarca) irregularis on record. 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- Eocene40%
- Pleistocene60%
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
2 formations
- Caloosahatchee Formation3
- Selsey Formation · Bracklesham Group1
Loading coastlines…
The named rock units Barbatia (Calloarca) irregularis 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.
Found in the same rock
422 taxa- Anomalocardia3 sites
- Arca wagneriana3 sites
- Compsodrillia3 sites
- Divaricella3 sites
- Kurtziella (Cryoturris) serta3 sites
- Mulinia3 sites
- Olivella mutica3 sites
- Tellidora lunulata3 sites
- Acteocina canaliculata2 sites
- Anadara2 sites
- Anadara (Anadara) campyla2 sites
- Anadara (Caloosarca) rustica2 sites
- Anadara (Rasia) lienosa2 sites
- Antalis2 sites
- Archierato maugeriae2 sites
- Arcopsis adamsi2 sites
- Argopecten anteamplicostata2 sites
- Aspella senex2 sites
- Atilia2 sites
- Bostrycapulus aculeatus2 sites
- Bothrocorbula wilcoxii2 sites
- Bulla striata2 sites
- Busycon2 sites
- Busycon (Busycon) rapum2 sites
The Paleobiology Database records 3 sites for Barbatia (Calloarca) irregularis, 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- Pliocene Mollusca of Southern Florida3
- Distribution of Mollusca in Units S1 to S9 of the Selsey Formation (middle Lutetian), Selsey Peninsula, West Sussex1
- Feeding habits of predatory gastropods in a Tertiary (Eocene) molluscan assemblage from the Paris Basin1
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. Each entry links to the Paleobiology Database's own record for the work.
Media and terms
Media content1

Picture of Barbatia (Calloarca) irregularis
- Source
- iDigBio
- Credit
- via iDigBio
- Licence
- CC0
- Commercial use
- the licence allows it
No 3D scan of Barbatia (Calloarca) irregularis was found in Sketchfab.
Smithsonian Open Access and MorphoSource were not reached for this taxon, so this list is what the others held rather than everything there is.
This is what the site found, which is not the same as what exists.
Keep going
What may have been alongside itCalloarca through timeThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Dall 1898