Drepanocheilus

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
- AnchurinaePBDB
- Diet
- detritivorePBDB, for Aporrhaidae
- Life habit
- semi-infaunalPBDB, for Aporrhaidae
- Motility
- slow-movingPBDB, for Aporrhaidae
- Vision
- limitedPBDB, for Gastropoda
Time the record covers
At least 80 million years on record.
The record covers at least 100.5 Mya to 20.45 Mya. No occurrence read is dated outside 113.2 Mya to 15.98 Mya.
117 occurrences of Drepanocheilus 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
117 occurrences- Early Cretaceous19%
- Late Cretaceous68%
- Paleocene5%
- Eoceneunder 1%
- Oligocene6%
- Mioceneunder 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
18 formations
- Tropic Shale Formation24
- Mancos Shale Formation21
- Kiowa Formation15
- Pierre Shale Formation11
- opoka Formation5
- Prairie Bluff Formation4
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The named rock units Drepanocheilus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 15 occurrences have no formation on record, which is common for older literature.
Drepanocheilus and its relatives
Late CretaceousWhere Drepanocheilus and its relatives were recorded in the Late Cretaceous.
Found in the same rock
1,269 taxa- Lucina44 sites
- Pycnodonte41 sites
- Inoceramidae40 sites
- Corbula36 sites
- Ostreidae34 sites
- Turritella31 sites
- Phelopteria29 sites
- Inoceramus (Inoceramus) pictus28 sites
- Inoceramus25 sites
- Euspira23 sites
- Sciponoceras20 sites
- Camptonectes19 sites
- Astarte18 sites
- Exogyra17 sites
- Ammonoidea16 sites
- Neocardioceras16 sites
- Nuculana16 sites
- Placenticeras14 sites
- Bivalvia12 sites
- Solemya12 sites
- Trachycardium12 sites
- Bellifusus11 sites
- Modiolus11 sites
- Turritella belviderei11 sites
The Paleobiology Database records 99 sites for Drepanocheilus, and this reads all of them. 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
23 references- The paleoecology of the Cenomanian-Turonian (Cretaceous) stage boundary extinctions at Black Mesa, Arizona45
- Paleoecology and Paleontology of the Lower Cretaceous Kiowa Formation, Kansas15
- The Red Bird Section of the Upper Cretaceous Pierre Shale in Wyoming8
- Maastrichtian non-cephalopod mollusks: Scaphopoda, Gastropoda and Bivalvia of the Middle Vistula Valley, central Poland7
- Mollusc fauna of the Hungarian Upper Oligocene (Egerian)6
- The molluscan and brachiopod fauna of the Late Cretaceous Pierre Shale (Baculites compressus/Baculites cuneatus biozones) near Kremmling, Colorado4
- Paleocene gastropods from Nûgssuaq, West Greenland4
- Upper Cretaceous (Maestrichtian) Mollusca from the Haustator bilira Assemblage Zone in the East Gulf Coastal Plain4
- Bioestratigrafía de macrofósiles del Cenomaniense Superior-Turoniense Inferior en el área de Satamera y Riofrío del Llano (Guadalajara, España)3
- The sedimentology and biostratigraphy of a temporary exposure of Blackdown Greensand (Lower Cretaceous, upper Albian) at Blackborough, Devon3
- Albian fauna of Gabal Manzour, Maghara area, north Sinai, Egypt3
- Gastropods from the Upper Cretaceous geological site at Tercis les Bains (SW France)2
Each of the 117 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. 11 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 Drepanocheilus
- Source
- iDigBio
- Credit
- via iDigBio
- Licence
- CC0
- Commercial use
- the licence allows it
No 3D scan was found. Smithsonian Open Access, MorphoSource and Sketchfab were all searched.
This is what the site found, which is not the same as what exists.
Keep going
What may have been alongside itAnchurinae through timeFormations of the Late CretaceousThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Meek 1864