Drepanocheilus
Searched as Drepanocheilus (Arrhoges) speciosus serus. The Paleobiology Database treats Drepanocheilus as the accepted name.

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 most 4.5 million years on record.
Every occurrence read is dated to somewhere between 20.45 Mya and 15.98 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.
2 occurrences of Drepanocheilus on record, most of them in the Miocene. 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
2 occurrences- Miocene100%
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
1 formation
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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.
Drepanocheilus and its relatives
MioceneWhere Drepanocheilus and its relatives were recorded in the Miocene.
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
1 referenceEach of the 2 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. Each entry links to doi.org. 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 of Drepanocheilus 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 itAnchurinae through timeFormations of the MioceneThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Meek 1864