Syncyclonema

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
- SyncyclonematinaePBDB
- Diet
- suspension feederPBDB
- Life habit
- epifaunalPBDB
- Motility
- facultatively mobilePBDB
- Vision
- limitedPBDB, for Entoliidae
- Environment
- marinePBDB, for Pectinida
Time the record covers
At least 135 million years on record.
The record covers at least 201.4 Mya to 66 Mya. No occurrence read is dated outside 237 Mya to 61.66 Mya.
444 occurrences of Syncyclonema on record, most of them in the Late Cretaceous. 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
444 occurrences- Late Triassicunder 1%
- Early Cretaceous7%
- Late Cretaceous92%
- Paleocene1%
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
53 formations
- Providence Formation74
- Corsicana Marl Formation66
- Prairie Bluff Formation24
- Peedee Formation21
- Ladd Formation15
- Chiwapa Formation13
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The named rock units Syncyclonema has been recovered from, largest first. Drawn where the rock is now, not where it formed. 29 further formations hold fewer occurrences each and are not listed. 89 occurrences have no formation on record, which is common for older literature.
Syncyclonema and its relatives
Late CretaceousWhere Syncyclonema and its relatives were recorded in the Late Cretaceous.
Found in the same rock
864 taxa- Anomia argentaria140 sites
- Crenella serica137 sites
- Nuculana123 sites
- Cymbophora121 sites
- Striarca102 sites
- Cubitostrea tecticosta97 sites
- Exogyra (Exogyra) costata97 sites
- Crassatella vadosa95 sites
- Hamulus onyx93 sites
- Caestocorbula (Caestocorbula) crassaplica92 sites
- Granocardium91 sites
- Camptonectes bubonis90 sites
- Vertebrata88 sites
- Veniella conradi86 sites
- Cyprimeria85 sites
- Serpula77 sites
- Vetericardiella70 sites
- Cyclorisma68 sites
- Linearis66 sites
- Nymphalucina linearia66 sites
- Pseudolimea reticulata66 sites
- Gabbigonia eufaulensis65 sites
- Turritella bilira64 sites
- Bryozoa63 sites
The Paleobiology Database records 368 sites for Syncyclonema, 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
54 references- Upper Cretaceous (Maestrichtian) larger invertebrates from the Haustator bilira Assemblage Zone in the Atlantic Coastal Plain with further data for the East Gulf94
- Unpublished data on Cretaceous-Paleocene molluscan assemblages74
- Upper Cretaceous (Maestrichtian) larger invertebrate Fossils from the Haustator bilira Assemblage Zone in the west gulf Coastal Plain68
- Upper Cretaceous (Maestrichtian) Mollusca from the Haustator bilira Assemblage Zone in the East Gulf Coastal Plain58
- Maastrichtian non-cephalopod mollusks: Scaphopoda, Gastropoda and Bivalvia of the Middle Vistula Valley, central Poland12
- The larger invertebrate fossils of the Navarro group of Texas12
- Sedimentology and extinction patterns across the Cretaceous-Tertiary boundary interval in East Texas11
- Patterns of molluscan extinction and recovery across the Cretaceous-Tertiary boundary in east Texas; report on new outcrops9
- Stratigraphy of the outcropping post-Magothy Upper Cretaceous formations in Southern New Jersey an Northern Delmarva peninsula, Delaware and Maryland9
- Lower Cretaceous stratigraphic units of Northern California9
- Upper Cretaceous formations and faunas of southern California8
- Die Großfauna der Mukronatenkreide (unteres Obercampan) im östlichen Münsterland7
Each of the 444 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. 42 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 Syncyclonema
- Source
- iDigBio
- Credit
- via iDigBio
- Licence
- CC0
- Commercial use
- the licence allows it
No 3D scan of Syncyclonema 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 itSyncyclonematinae through timeFormations of the Late CretaceousThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Meek 1864