Strepsidura

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
- PseudolivinaePBDB
- Diet
- carnivorePBDB, for Buccinidae
- Life habit
- epifaunalPBDB, for Buccinidae
- Motility
- actively mobilePBDB, for Buccinidae
- Vision
- limitedPBDB, for Gastropoda
Time the record covers
At least 47 million years on record.
The record covers at least 85.7 Mya to 37.71 Mya. No occurrence read is dated outside 89.8 Mya to 33.9 Mya.
106 occurrences of Strepsidura 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
106 occurrences- Late Cretaceous4%
- Paleocene35%
- Eocene61%
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
37 formations
- Tejon Formation10
- Porters Creek Formation · Midway Group9
- Ameki Formation · Bende-Ameki Group7
- Aquia Formation · Pamunkey Group7
- Reklaw Formation · Claiborne Group6
- Hatchetigbee Bluff Formation · Wilcox Group4
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The named rock units Strepsidura has been recovered from, largest first. Drawn where the rock is now, not where it formed. 13 further formations hold fewer occurrences each and are not listed. 15 occurrences have no formation on record, which is common for older literature.
Strepsidura and its relatives
EoceneWhere Strepsidura and its relatives were recorded in the Eocene.
Found in the same rock
2,015 taxa- Natica27 sites
- Turritella27 sites
- Turricula21 sites
- Pseudoliva17 sites
- Dentalium16 sites
- Athleta (Volutocorbis)15 sites
- Ostrea15 sites
- Tellina15 sites
- Corbula14 sites
- Falsifusus14 sites
- Glycymeris14 sites
- Pitar14 sites
- Acteon13 sites
- Architectonica13 sites
- Clavilithes13 sites
- Gemmula (Coronia)13 sites
- Levifusus13 sites
- Nucula13 sites
- Calyptraphorus12 sites
- Crassatella12 sites
- Fusinus12 sites
- Bittium11 sites
- Cucullaea11 sites
- Ficus11 sites
The Paleobiology Database records 85 sites for Strepsidura, and this reads all 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
45 references- Resilience of marine invertebrate communities during the early Cenozoic hyperthermals13
- Catalogue of the Paleocene and Eocene mollusca of the southern and eastern United States. Part 1. Pelecypoda, Amphineura, Pteropoda, Scaphopoda and Cephalopoda11
- Depositional dynamics and the record of ecosystem stability: early Eocene faunal gradients in the Pyrenean foreland, Spain7
- Eocene Mollusca from Nigeria7
- Fauna of the Type Tejon: Its relation to the Cowlitz Phase of the Tejon Group of Washington6
- Stratigraphic Distribution of Paleocene and Eocene Fossils in the Eastern Gulf Coast Region5
- The Molluscan Macrofauna of the Reklaw Formation, Marquez Member (Eocene: Lower Claibornian), in Texas4
- Stratigraphy and sedimentology of the Eocene Tejon Formation, western Tehachapi and San Emigdio mountains, California3
- Megapaleontology of the Eocene Llajas Formation, Simi Valley, California3
- Faunal Horizons of the Barton Beds in Hampshire3
- Nouvelles données sur les Mollusques et autres macro-organismes campaniens de Sikoum (Centre-Est du sous bassin de Douala-Cameroun): intérêts bio-chronologiques et paléo-écologiques2
- Distribution of Mollusca in Units S1 to S9 of the Selsey Formation (middle Lutetian), Selsey Peninsula, West Sussex2
Each of the 106 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. 33 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 content1

Picture of Strepsidura
- Source
- iDigBio
- Credit
- via iDigBio
- Licence
- CC0
- Commercial use
- the licence allows it
No 3D scan of Strepsidura 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 itPseudolivinae through timeFormations of the EoceneThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. (Swainson 1840)