Gastropoda
Gastropods are a vast and diverse group of invertebrates within the phylum Mollusca, comprising the animals commonly known as snails and slugs. With an estimated 65,000 to 80,000 living species, they form the second-largest animal class after the insects. The fossil record of gastropods extends back to the Late Cambrian. As of 2017, 721 families are recognized—476 extant and 245 extinct known only from fossils.

See his respective owners. · 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- Also called
- snailPBDB
- Sits inside
- MolluscaPBDB
- Life habit
- epifaunalPBDB
- Motility
- actively mobilePBDB
- Vision
- limitedPBDB
Time the record covers
At least 481 million years on record.
The record covers at least 488.9 Mya to 7.246 Mya. No occurrence read is dated outside 497 Mya to 5.333 Mya.
12,000+ occurrences of Gastropoda on record. The Paleobiology Database records this as a living group, and the chart stops with its fossils rather than at the present. 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
12,000 occurrences read- Cambrianunder 1%
- Ordovician6%
- Silurian3%
- Devonian3%
- Carboniferous5%
- Middle Jurassicunder 1%
- Late Jurassic2%
- Early Cretaceous7%
- Late Cretaceous41%
- Paleocene5%
- Eocene27%
- Oligoceneunder 1%
- 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. The read hit its cap, so every figure above is a floor and the shares are of the occurrences read. More on what this infers.
Found in
at least 386 formations
- Prairie Bluff Formation1,241
- Providence Formation1,012
- Lisbon Formation · Claiborne Group721
- Corsicana Marl Formation616
- Cook Mountain Formation552
- Moodys Branch Formation · Jackson Group414
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The named rock units Gastropoda has been recovered from, largest first. Drawn where the rock is now, not where it formed. The read hit its cap, so each count is a floor. 362 further formations hold fewer occurrences each and are not listed. 1,070 occurrences have no formation on record, which is common for older literature.
Found in the same rock
1,637 taxa- Crinoidea108 sites
- Crurithyris45 sites
- Brachiopoda42 sites
- Rhombopora40 sites
- Hallopora39 sites
- Isotelus35 sites
- Leptaena35 sites
- Lingula35 sites
- Modiolopsis35 sites
- Rafinesquina35 sites
- Bivalvia33 sites
- Ambonychia32 sites
- Flexicalymene32 sites
- Nuculites32 sites
- Pterinea31 sites
- Ctenodonta30 sites
- Hormotoma30 sites
- Orbiculoidea30 sites
- Punctospirifer29 sites
- Camarotoechia27 sites
- Rhipidomella27 sites
- Strophomena27 sites
- Zygospira27 sites
- Composita26 sites
The Paleobiology Database records at least 544 sites for Gastropoda, and this reads 240 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
at least 305 references- Upper Cretaceous (Maestrichtian) Mollusca from the Haustator bilira Assemblage Zone in the East Gulf Coastal Plain2,086
- Faunal stability and environmental change in the middle Eocene Gulf Coastal Plain (PhD Thesis, Harvard University)1,219
- Upper Cretaceous (Maestrichtian) larger invertebrates from the Haustator bilira Assemblage Zone in the Atlantic Coastal Plain with further data for the East Gulf1,041
- Upper Cretaceous (Maestrichtian) larger invertebrate Fossils from the Haustator bilira Assemblage Zone in the west gulf Coastal Plain949
- Jura Vaudois et Neuchatelois417
- Fossil assemblages of a marine transgressive sand, Moody''s Branch Formation (Upper Eocene), Louisiana and Mississippi368
- Ecological control of evolutionary rates in Paleocene - Eocene marine molluscs291
- Stratigraphic Distribution of Paleocene and Eocene Fossils in the Eastern Gulf Coast Region280
- Effects of sampling on paleoecologic and taphonomic analyses in high-diversity fossil accumulations: an example from the Eocene Gosport Sand, Alabama259
- The first 2 million years after the Cretaceous-Tertiary boundary in east Texas: Rate and paleoecology of the molluscan recovery202
- Paleoecology and taphonomy of faunal assemblages in gray "core" (offshore) shales in Midcontinent Pennsylvanian cyclothems193
- Faune des Sables a Nummulites Variolarius de Barisseuse, pres de Saint-Vast-les-Mello (Oise), et Remarques Paleontologiques185
Each of the 12,000 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. That read hit its cap, so each count is a floor. 293 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 content2
Picture of Gastropoda
- Source
- Wikipedia/Commons
- Credit
- See his respective owners.
- Licence
- Public Domain
- Commercial use
- the licence allows it
3D model
- Source
- Sketchfab
- Licence
- CC0 Public Domain
- Commercial use
- the licence allows it
The description on this site
- Source
- Wikipedia, “Gastropod”
- 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 itMollusca through timeThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Cuvier 1795