Calyptraphorus
Calyptraphorus, also known by its alternative spelling Calyptrophoris, is an extinct genus of sorbeochonid gastropod that belongs to the family Rostellariidae. It had a global distribution occurring from the Cretaceous period to the mid-Pliocene epoch. Members of this genus were likely epifaunal grazers.

MNHN - Museum national d'Histoire naturelle - Pierre Massicard · CC BY 4.0 · 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
- RostellariidaePBDB
- Diet
- grazerPBDB, for Stromboidea
- Life habit
- epifaunalPBDB, for Stromboidea
- Motility
- actively mobilePBDB, for Stromboidea
- Vision
- limitedPBDB, for Gastropoda
Time the record covers
At least 28 million years on record.
The record covers at least 66 Mya to 37.71 Mya. No occurrence read is dated outside 83.6 Mya to 33.9 Mya.
288 occurrences of Calyptraphorus on record, most of them in the Eocene. 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
288 occurrences- Late Cretaceousunder 1%
- Paleocene40%
- Eocene59%
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
40 formations
- Moodys Branch Formation · Jackson Group53
- Kincaid Formation · Midway Group34
- Tuscahoma Formation · Wilcox Group19
- Hatchetigbee Bluff Formation · Wilcox Group19
- Lisbon Formation · Claiborne Group17
- Porters Creek Formation · Midway Group17
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The named rock units Calyptraphorus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 16 further formations hold fewer occurrences each and are not listed. 7 occurrences have no formation on record, which is common for older literature.
Calyptraphorus and its relatives
EoceneWhere Calyptraphorus and its relatives were recorded in the Eocene.
Found in the same rock
1,799 taxa- Turritella103 sites
- Pitar64 sites
- Pseudoliva vetusta62 sites
- Calyptraea (Trochita) aperta58 sites
- Cadulus56 sites
- Venericardia53 sites
- Dentalium48 sites
- Athleta petrosa45 sites
- Athleta42 sites
- Natica42 sites
- Tellina42 sites
- Ancilla staminea41 sites
- Ostrea41 sites
- Bullata semen39 sites
- Levifusus39 sites
- Sinum39 sites
- Architectonica38 sites
- Eburneopecten scintillatus38 sites
- Hipponix38 sites
- Ficus37 sites
- Glycymeris idonea36 sites
- Polinices36 sites
- Gastropoda33 sites
- Gemmula (Coronia)33 sites
The Paleobiology Database records 190 sites for Calyptraphorus, 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
32 references- Stratigraphic Distribution of Paleocene and Eocene Fossils in the Eastern Gulf Coast Region51
- Catalogue of the Paleocene and Eocene mollusca of the southern and eastern United States. Part 1. Pelecypoda, Amphineura, Pteropoda, Scaphopoda and Cephalopoda47
- Resilience of marine invertebrate communities during the early Cenozoic hyperthermals41
- Impact of lithification on the diversity, size distribution, and recovery dynamics of marine invertebrate assemblages19
- Fossil assemblages of a marine transgressive sand, Moody''s Branch Formation (Upper Eocene), Louisiana and Mississippi19
- Invertebrate Macropaleontolgy of the Clarke County Mississippi Area16
- Environmental and biological controls on the diversity and ecology of Late Cretaceous through early Paleogene marine ecosystems in the US Gulf Coastal Plain13
- Ecological control of evolutionary rates in Paleocene - Eocene marine molluscs12
- The Midway Group of Texas11
- Faunal stability and environmental change in the middle Eocene Gulf Coastal Plain (PhD Thesis, Harvard University)10
- Effects of sampling on paleoecologic and taphonomic analyses in high-diversity fossil accumulations: an example from the Eocene Gosport Sand, Alabama10
- Mollusca of the Tertiary formations of Northeastern Mexico6
Each of the 288 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. 20 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 Calyptraphorus
- Source
- Wikipedia/Commons
- Credit
- MNHN - Museum national d'Histoire naturelle - Pierre Massicard
- Licence
- CC BY 4.0
- Commercial use
- the licence allows it
No 3D scan was found. Smithsonian Open Access, MorphoSource and Sketchfab were all searched.
The description on this site
- 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 itRostellariidae through timeFormations of the EoceneThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Conrad 1857