Inoceramidae
The Inoceramidae are an extinct family of bivalves ("clams") in the class Mollusca. Fossils of inoceramids are found in marine sediments of Permian to latest Cretaceous in age. Inoceramids tended to live in upper bathyal and neritic environments. Many species of inoceramid are found all over the world, demonstrating the wide distribution of their preferred ecosystems, and possibly long-lived planktotrophic larvae. Despite their wide distribution, the pace of evolution of inoceramids was great, with species ranges commonly averaging 0.2–0.5 Ma.

Wilson44691 · 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
- InoceramoideaPBDB
- Diet
- suspension feederPBDB, for Pteriomorphia
- Life habit
- epifaunalPBDB, for Pteriomorphia
- Motility
- facultatively mobilePBDB, for Pteriomorphia
- Vision
- blindPBDB, for Bivalvia
Time the record covers
At least 143 million years on record.
The record covers at least 215.38 Mya to 72.2 Mya. No occurrence read is dated outside 227.3 Mya to 66 Mya.
4,598 occurrences of Inoceramidae 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
4,598 occurrences- Late Triassicunder 1%
- Early Jurassic6%
- Middle Jurassic6%
- Late Jurassic2%
- Early Cretaceous10%
- Late Cretaceous75%
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
437 formations
- Mancos Shale Formation234
- Cotinguiba Formation233
- Niobrara Formation · Colorado Group133
- Greenhorn Limestone Formation · Colorado Group111
- Pierre Shale Formation · Montana Group103
- Whitby Mudstone Formation81
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The named rock units Inoceramidae has been recovered from, largest first. Drawn where the rock is now, not where it formed. 413 further formations hold fewer occurrences each and are not listed. 1,557 occurrences have no formation on record, which is common for older literature.
Inoceramidae and its relatives
Late CretaceousWhere Inoceramidae and its relatives were recorded in the Late Cretaceous.
Found in the same rock
1,029 taxa- Inoceramus112 sites
- Nuculana51 sites
- Bryozoa41 sites
- Pycnodonte vesicularis41 sites
- Panopea38 sites
- Pycnodonte36 sites
- Nucula34 sites
- Spondylus32 sites
- Granocardium31 sites
- Cymbophora30 sites
- Dhondtichlamys30 sites
- Modiolus29 sites
- Lyriochlamys28 sites
- Inoceramus (Endocostea)27 sites
- Aphrodina26 sites
- Cataceramus subcompressus26 sites
- Hoploscaphites26 sites
- Syncyclonema26 sites
- Cyprimeria25 sites
- Glycymerita24 sites
- Limopsis24 sites
- Pseudolimea24 sites
- Ambigostrea23 sites
- Anomia23 sites
The Paleobiology Database records at least 1,131 sites for Inoceramidae, 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
529 references- Die Oberkreide der Sack-Mulde bei Alfeld (Cenoman-Unter-Coniac) Lithologie, Biostratigraphie und Inoceramen592
- The paleoecology of the Cenomanian-Turonian (Cretaceous) stage boundary extinctions at Black Mesa, Arizona279
- Turonian inoceramids and biostratigraphy of the Sergipe Basin, northeastern Brazil: an integrated study of the Votorantim and Nassau quarries209
- Unpublished data on Cretaceous-Paleocene molluscan assemblages207
- Biostratigraphy of the Lower and Middle Jurassic deposits of the Far East121
- The Red Bird Section of the Upper Cretaceous Pierre Shale in Wyoming92
- Upper Cretaceous (Campanian and Maestrichtian) ammonites from southern Alaska87
- The Impact of Global Warming and Anoxia on Marine Benthic Community Dynamics: an Example from the Toarcian (Early Jurassic)82
- Stratigraphy of the Upper Cretaceous Niobrara Formation in the Raton basin, New Mexico79
- Paläontologische Untersuchungen im unteren Opalinuston der Nordschweiz73
- Distribution, stratigraphy and stratigraphic relationships of Cretaceous sediments, western Raukumara Peninsula, New Zealand71
- Chronology, relative sea-level history and a new sequence stratigraphic model for basinal Cretaceous facies of Colombia68
Each of the 4,598 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. 517 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 Inoceramidae
- Source
- Wikipedia/Commons
- Credit
- Wilson44691
- Licence
- Public Domain
- Commercial use
- the licence allows it
No 3D scan of Inoceramidae 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
- 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 itInoceramoidea through timeFormations of the Late CretaceousThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Giebel 1852