Seila
Seila is a genus of minute sea snails, marine gastropod molluscs or micromolluscs in the family Cerithiopsidae.

Jan Delsing · Public Domain · 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
- CerithiopsidaePBDB
- Diet
- carnivorePBDB, for Cerithiopsidae
- Life habit
- epifaunalPBDB, for Cerithiopsidae
- Motility
- actively mobilePBDB, for Cerithiopsidae
- Vision
- limitedPBDB, for Gastropoda
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 83.6 Mya to 0 Mya.
156 occurrences of Seila on record, most of them in the Pleistocene. 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
156 occurrences- Late Cretaceous10%
- Paleocene3%
- Eocene17%
- Oligocene1%
- Miocene16%
- Pliocene16%
- Pleistocene36%
- Holocene1%
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
61 formations
- Providence Formation7
- James City Formation7
- Chipola Formation · Alum Bluff Group7
- Yorktown Formation6
- Ripley Formation · Selma Group5
- Selsey Formation · Bracklesham Group5
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The named rock units Seila has been recovered from, largest first. Drawn where the rock is now, not where it formed. 37 further formations hold fewer occurrences each and are not listed. 26 occurrences have no formation on record, which is common for older literature.
Seila and its relatives
PleistoceneWhere Seila and its relatives were recorded in the Pleistocene.
Found in the same rock
2,344 taxa- Crepidula plana22 sites
- Crepidula fornicata21 sites
- Nucula (Nucula) proxima20 sites
- Turritella19 sites
- Plicatula gibbosa18 sites
- Turbonilla17 sites
- Epitonium16 sites
- Nuculana acuta16 sites
- Odostomia16 sites
- Neverita duplicatus15 sites
- Crassinella lunulata14 sites
- Busycon13 sites
- Olivella mutica13 sites
- Parvilucina multistriata13 sites
- Balanus12 sites
- Bostrycapulus aculeatus12 sites
- Mulinia lateralis12 sites
- Tellina12 sites
- Abra aequalis11 sites
- Acteon11 sites
- Conradostrea sculpturata11 sites
- Cyclocardia granulata11 sites
- Cylichna11 sites
- Tectonatica pusilla11 sites
The Paleobiology Database records 119 sites for Seila, 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
77 references- Resilience of marine invertebrate communities during the early Cenozoic hyperthermals11
- Cerithiidae and Potamididae (Mollusca: Gastropoda) from the Chipola Formation of northwestern Florida7
- The G.D Harris 1890 manuscript on the stratigraphy of Miocene and Pliocene beds at Yorktown, Virginia6
- Upper Cretaceous (Maestrichtian) larger invertebrates from the Haustator bilira Assemblage Zone in the Atlantic Coastal Plain with further data for the East Gulf6
- Distribution of Mollusca in Units S1 to S9 of the Selsey Formation (middle Lutetian), Selsey Peninsula, West Sussex5
- Checklist of megafossils from the James City Formation (Lower Pleistocene) at Johnson Point, Craven County, North Carolina4
- Late Pliocene and Early Pleistocene Mollusca from the James City and Chowan River Formations at Lee Creek Mine4
- Late Pleistocene molluscan faunas from upper terraces of the Palos Verdes Hills, California4
- Miocene and Pliocene mollusks from Trinidad4
- Studies on the marine Pleistocene: Part II. The marine Pleistocene mollusks of eastern North America4
- Late Pleistocene faunas from the northwestern coast of Baja California, Mexico4
- On the reconciliation of biostratigraphy and strontium isotope stratigraphy of three southern Californian Plio-Pleistocene formations3
Each of the 156 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. 65 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 Seila
- Source
- Wikipedia/Commons
- Credit
- Jan Delsing
- Licence
- Public Domain
- Commercial use
- the licence allows it
No 3D scan of Seila was found in MorphoSource and Sketchfab.
Smithsonian Open Access was not reached for this taxon, so this list is what the others held rather than everything there is.
The description on this site
- Source
- Wikipedia, “Seila”
- 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 itCerithiopsidae through timeFormations of the PleistoceneThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Adams 1861