Barbatia (Plagiarca) rhomboidella

Not Barbatia (Plagiarca) rhomboidella. This is Barbatia rhomboidella (Lea, 1833), a relative — both are Arcidae.
Stichting Schepsel Schelp · CC BY 4.0 · via GBIF. 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
- PlagiarcaPBDB
- Diet
- suspension feederPBDB, for Arcinae
- Life habit
- epifaunalPBDB, for Arcinae
- Motility
- stationary, attachedPBDB, for Arcinae
- Vision
- limitedPBDB, for Arcidae
- Environment
- lagoonal,coastal,inner shelf,outer shelf,oceanic,brackish,freshwaterPBDB, for Arcidae
Time the record covers
At least 3.3 million years on record.
The record covers at least 41.03 Mya to 37.71 Mya. No occurrence read is dated outside 56 Mya to 33.9 Mya.
74 occurrences of Barbatia (Plagiarca) rhomboidella on record, most of them in the Eocene. 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
74 occurrences- Eocene100%
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
12 formations
- Lisbon Formation · Claiborne Group28
- Cook Mountain Formation · Claiborne Group21
- Gosport Sand Formation · Claiborne Group6
- Nanjemoy Formation4
- Santee Limestone Formation3
- Tallahatta Formation · Claiborne Group3
Loading coastlines…
The named rock units Barbatia (Plagiarca) rhomboidella has been recovered from, largest first. Drawn where the rock is now, not where it formed.
Barbatia (Plagiarca) rhomboidella and its relatives
EoceneWhere Barbatia (Plagiarca) rhomboidella and its relatives were recorded in the Eocene.
Found in the same rock
785 taxa- Turritella46 sites
- Ficus37 sites
- Athleta petrosa35 sites
- Cadulus35 sites
- Cubitostrea sellaeformis35 sites
- Pseudoliva vetusta35 sites
- Retusa galba31 sites
- Calyptraea (Trochita) aperta30 sites
- Venericardia (Rotundicardia) rotunda30 sites
- Buccitriton texanum29 sites
- Levifusus mortoniopsis29 sites
- Ancilla staminea28 sites
- Bullata semen27 sites
- Gastropoda27 sites
- Naticidae27 sites
- Nucula (Nucula) magnifica27 sites
- Caryocorbula deusseni26 sites
- Pachecoa26 sites
- Corbula (Caryocorbula) alabamiensis25 sites
- Calyptraphorus velatus24 sites
- Hipponix24 sites
- Turritella nasuta24 sites
- Latirus moorei23 sites
- Sinum23 sites
The Paleobiology Database records 60 sites for Barbatia (Plagiarca) rhomboidella, 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
11 references- Faunal stability and environmental change in the middle Eocene Gulf Coastal Plain (PhD Thesis, Harvard University)20
- Ecological control of evolutionary rates in Paleocene - Eocene marine molluscs13
- Catalogue of the Paleocene and Eocene mollusca of the southern and eastern United States. Part 1. Pelecypoda, Amphineura, Pteropoda, Scaphopoda and Cephalopoda12
- Resilience of marine invertebrate communities during the early Cenozoic hyperthermals9
- Stratigraphic Distribution of Paleocene and Eocene Fossils in the Eastern Gulf Coast Region6
- Eocene biostratigraphy of South Carolina and its relationship to Gulf Coastal Plain zonations and global changes of coastal onlap4
- Effects of sampling on paleoecologic and taphonomic analyses in high-diversity fossil accumulations: an example from the Eocene Gosport Sand, Alabama3
- Geology of the Coastal Plain of South Carolina3
- Environmental and biological controls on the diversity and ecology of Late Cretaceous through early Paleogene marine ecosystems in the US Gulf Coastal Plain2
- Invertebrate Macropaleontolgy of the Clarke County Mississippi Area1
- Pelecypoda of the St. Maurice and Claiborne stages1
Each of the 74 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 Barbatia rhomboidella (Lea, 1833)
- Source
- GBIF
- Credit
- Stichting Schepsel Schelp
- 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.
This is what the site found, which is not the same as what exists.
Keep going
What may have been alongside itPlagiarca through timeFormations of the EoceneThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. (Lea 1833)