Crassispira
Crassispira is a genus of small predatory sea snails with narrow, high-spired shells, marine gastropod mollusks in the family Pseudomelatomidae. They first appeared in the fossil record approximately 48.6 million years ago during the Eocene epoch, and still exist in the present day.

Jan Delsing · Public Domain · 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
- PseudomelatomidaePBDB
- Diet
- carnivorePBDB, for Conoidea
- Life habit
- epifaunalPBDB, for Conoidea
- Motility
- actively mobilePBDB, for Conoidea
- Vision
- limitedPBDB, for Gastropoda
Time the record covers
At least 41 million years on record.
The record covers at least 41.03 Mya to 11.7 ka. No occurrence read is dated outside 48.07 Mya to 0 Mya.
240 occurrences of Crassispira on record, most of them in the Miocene. 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
240 occurrencesThese 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
71 formations
- Kama Formation17
- Byram Formation · Vicksburg Group16
- Castilletes Formation10
- Bowden Formation · Coastal Group8
- Toukoshan Formation · Miaoli Group8
- Gatun Formation7
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The named rock units Crassispira has been recovered from, largest first. Drawn where the rock is now, not where it formed. 47 further formations hold fewer occurrences each and are not listed. 45 occurrences have no formation on record, which is common for older literature.
Crassispira and its relatives
MioceneWhere Crassispira and its relatives were recorded in the Miocene.
Found in the same rock
2,277 taxa- Dentalium14 sites
- Drillia14 sites
- Turritella13 sites
- Anadara12 sites
- Cancellaria11 sites
- Corbula11 sites
- Nuculana11 sites
- Terebra11 sites
- Turricula11 sites
- Acteocina10 sites
- Chlamys10 sites
- Conomitra10 sites
- Gemmula10 sites
- Glyphostoma10 sites
- Pseudochama10 sites
- Ringicula10 sites
- Semele10 sites
- Solariorbis10 sites
- Strioterebrum10 sites
- Uromitra10 sites
- Anomia9 sites
- Arcopsis adamsi9 sites
- Cylichna9 sites
- Fusinus9 sites
The Paleobiology Database records 107 sites for Crassispira, and this reads all 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
73 references- Molluschi marini del Plio-Pleistocene dell'Emilia-Romagna e della Toscana, Conoidea, Vol. 1 - Drilliidae e Turridae28
- Comparative diagnoses of Pleurotomidae from the Tertiary formations of Burma15
- A paleobiotic survey of Caribbean faunas from the Neogene of the Isthmus of Panama13
- The Molluscan Fauna of the Alum Bluff Group of Florida10
- Neogene molluscs, shallow marine paleoenvironments, and chronostratigraphy of the Guajira Peninsula, Colombia9
- Faunal Horizons of the Barton Beds in Hampshire9
- Unpublished census data from Atlantic coastal plain and circum-Caribbean Neogene assemblages and taxonomic opinions8
- Quelques Cones et Pleurotomes du Lutétien du Bassin de Paris8
- Lower Oligocene Gastropoda, Scaphopoda, and Cephalopoda of the Vicksburg Group in Mississippi8
- Faunal analysis of the Upper Miaoli Group in the Tunghsiao area, Miaoli Province, Formosa, China8
- Testing for patterns of faunal persistence in the early Oligocene Byram Formation of Mississippi7
- Unpublished notes on Caribbean collection of the Naturhistorisches Museum Basel6
Each of the 240 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. 61 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 Crassispira
- Source
- Wikipedia/Commons
- Credit
- Jan Delsing
- Licence
- Public Domain
- Commercial use
- the licence allows it
No 3D scan of Crassispira 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.
The description on this site
- Source
- Wikipedia, “Crassispira”
- 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 itPseudomelatomidae through timeFormations of the MioceneThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. (Swainson 1840)