Seguenzioidea
Searched as Eucycloidea. The Paleobiology Database treats Seguenzioidea as the accepted name.
via iDigBio · CC BY-NC-ND · 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
- VetigastropodaPBDB
- Diet
- grazerPBDB
- Life habit
- epifaunalPBDB
- Motility
- actively mobilePBDB
- Vision
- limitedPBDB, for Gastropoda
Time the record covers
At least 274 million years on record.
The record covers at least 274.4 Mya to 11.7 ka. No occurrence read is dated outside 283.3 Mya to 0 Mya.
1,052 occurrences of Seguenzioidea 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
1,052 occurrences- Permianunder 1%
- Middle Triassic7%
- Late Triassic14%
- Early Jurassic18%
- Middle Jurassic10%
- Late Jurassic2%
- Early Cretaceous6%
- Late Cretaceous21%
- Paleocene3%
- Eocene4%
- Oligocene2%
- Miocene3%
- Pliocene4%
- Pleistocene5%
- 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
189 formations
- Cassian Formation113
- Qingyan Formation65
- opoka Formation29
- Ripley Formation · Selma Group28
- Keasey Formation23
- Coffee Sand Formation · Selma Group20
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The named rock units Seguenzioidea has been recovered from, largest first. Drawn where the rock is now, not where it formed. 165 further formations hold fewer occurrences each and are not listed. 305 occurrences have no formation on record, which is common for older literature.
Seguenzioidea and its relatives
Late CretaceousWhere Seguenzioidea and its relatives were recorded in the Late Cretaceous.
Found in the same rock
2,344 taxa- Nuculana58 sites
- Serpula53 sites
- Turritella trilira50 sites
- Euspira rectilabrum48 sites
- Calliomphalus43 sites
- Anomia argentaria42 sites
- Turritella vertebroides42 sites
- Bryozoa41 sites
- Corbula41 sites
- Crenella serica41 sites
- Cymbophora41 sites
- Calliomphalus (Calliomphalus) americanus40 sites
- Crassatella vadosa40 sites
- Syncyclonema39 sites
- Turritella39 sites
- Caestocorbula (Caestocorbula) crassaplica37 sites
- Granocardium37 sites
- Laevidentalium37 sites
- Eucyclus36 sites
- Parallelodon36 sites
- Linearis35 sites
- Glycymeris33 sites
- Veniella conradi33 sites
- Dentalium32 sites
The Paleobiology Database records 651 sites for Seguenzioidea, 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
260 references- Fossilvergesellschaftungen, Paläoökologie und paläosynökologische Entwicklung im Oberen Anisium (Mittlere Trias) von Qingyan, insbesondere Bangtoupo, Provinz Guizhou, Südwestchina58
- Maastrichtian non-cephalopod mollusks: Scaphopoda, Gastropoda and Bivalvia of the Middle Vistula Valley, central Poland40
- Paleoökológia, paleo(bio)geográfia, evolúció és biokronológia bakonyi jura gastropodák tükrében37
- Primary collection data of Cassian Formation used for publication of Fürsich and Wendt (1977) (ref. 9188)33
- Upper Cretaceous (Maestrichtian) Mollusca from the Haustator bilira Assemblage Zone in the East Gulf Coastal Plain24
- Paleogene Marine Gastropods of the Keasey Formation in Oregon23
- Palökologie von Benthos-Gemeinschaften im oberen Pliensbach (Amaltheenton) von Kalchreuth (Mittelfranken)22
- Archeogastropoda, Mesogastropoda and stratigraphy of the Ripley, Owl Creek, and Prairie Bluff Formations22
- The genera Calliotropis Seguenza and Ambercyclus n. gen. (Vetigastropoda, Eucyclidae) from the Early Jurassic of Argentina21
- Upper Cretaceous (Maestrichtian) larger invertebrates from the Haustator bilira Assemblage Zone in the Atlantic Coastal Plain with further data for the East Gulf21
- Middle Jurassic Gastropods from the Central High Atlas, Morocco20
- Die Gastropoden der Schichten von St. Cassian der südalpinen Trias. I. Theil18
Each of the 1,052 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. 248 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 Seguenzioidea
- Source
- iDigBio
- Credit
- via iDigBio
- Licence
- CC BY-NC-ND
- Commercial use
- the licence does not allow it
No 3D scan of Seguenzioidea 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 itVetigastropoda through timeFormations of the Late CretaceousThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Koken 1897