Striarca
Striarca is a genus of bivalves belonging to the family Noetiidae.

Hans Hillewaert · CC BY-SA 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
- StriarciniPBDB
- Diet
- suspension feederPBDB, for Arcidae
- Life habit
- epifaunalPBDB, for Arcidae
- Motility
- facultatively mobile, attachedPBDB, for Arcidae
- Vision
- limitedPBDB, for Arcidae
- Environment
- lagoonal,coastal,inner shelf,outer shelf,oceanic,brackish,freshwaterPBDB, for Arcidae
Time the record covers
At least 72 million years on record.
The record covers at least 72.2 Mya to 11.7 ka. No occurrence read is dated outside 100.5 Mya to 0 Mya.
388 occurrences of Striarca on record, most of them in the Late Cretaceous. 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
388 occurrences- Late Cretaceous71%
- Paleocene4%
- Eoceneunder 1%
- Oligoceneunder 1%
- Miocene10%
- Pliocene7%
- Pleistocene7%
- Holoceneunder 1%
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
54 formations
- Providence Formation79
- Escondido Formation59
- Corsicana Marl Formation44
- Severn Formation13
- Prairie Bluff Formation · Selma Group12
- Toukoshan Formation · Miaoli Group11
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The named rock units Striarca has been recovered from, largest first. Drawn where the rock is now, not where it formed. 30 further formations hold fewer occurrences each and are not listed. 68 occurrences have no formation on record, which is common for older literature.
Striarca and its relatives
Late CretaceousWhere Striarca and its relatives were recorded in the Late Cretaceous.
Found in the same rock
736 taxa- Nuculana131 sites
- Cymbophora120 sites
- Syncyclonema99 sites
- Anomia argentaria92 sites
- Corbula79 sites
- Crenella serica77 sites
- Vertebrata73 sites
- Vetericardiella70 sites
- Cyprimeria68 sites
- Ostrea68 sites
- Camptonectes bubonis63 sites
- Crassatella vadosa62 sites
- Dentalium leve60 sites
- Cubitostrea tecticosta59 sites
- Linearis59 sites
- Nucula percrassa59 sites
- Anomia ornata58 sites
- Malletia58 sites
- Nemodon eufaulensis56 sites
- Neogastropoda56 sites
- Turritella bilira56 sites
- Turritella55 sites
- Nymphalucina linearia54 sites
- Veniella conradi53 sites
The Paleobiology Database records 324 sites for Striarca, and this reads 240 of them. Of that, one read hit the database's own return limit, so every count below is a floor rather than a total. 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
63 references- Upper Cretaceous (Maestrichtian) larger invertebrate Fossils from the Haustator bilira Assemblage Zone in the west gulf Coastal Plain95
- Upper Cretaceous (Maestrichtian) larger invertebrates from the Haustator bilira Assemblage Zone in the Atlantic Coastal Plain with further data for the East Gulf66
- Upper Cretaceous (Maestrichtian) Mollusca from the Haustator bilira Assemblage Zone in the East Gulf Coastal Plain47
- Unpublished data on Cretaceous-Paleocene molluscan assemblages35
- Patterns of molluscan extinction and recovery across the Cretaceous-Tertiary boundary in east Texas; report on new outcrops20
- Faunal analysis of the Upper Miaoli Group in the Tunghsiao area, Miaoli Province, Formosa, China11
- Sedimentology and extinction patterns across the Cretaceous-Tertiary boundary interval in East Texas8
- The G.D Harris 1890 manuscript on the stratigraphy of Miocene and Pliocene beds at Yorktown, Virginia7
- Preliminary notes on fossil records of East Malaysia and Brunei7
- Changes in Late Cretaceous - early Tertiary benthic marine assemblages: analyses from the North American coastal plain shallow-shelf5
- The first 2 million years after the Cretaceous-Tertiary boundary in east Texas: Rate and paleoecology of the molluscan recovery5
- Lithofazielle Entwicklung und Molluskenfauna des oberen Badeniens (Miozän M4d) in dem Gebiet Bratislava-Devinska Nova Ves [Lithofacies and mollusc fauna of the Upper Badenian in the Bratislava-Devinska Nova Ves area]5
Each of the 388 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. 51 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 content2
Picture of Striarca
- Source
- Wikipedia/Commons
- Credit
- Hans Hillewaert
- Licence
- CC BY-SA 4.0
- Commercial use
- the licence allows it
3D model
- Source
- Sketchfab
- Licence
- CC Attribution
- Commercial use
- cannot be read from the licence given — check the record
The description on this site
- Source
- Wikipedia, “Striarca”
- 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 itStriarcini through timeFormations of the Late CretaceousThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Conrad 1862