Oxytomidae

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
- OxytomoideaPBDB
- Diet
- suspension feederPBDB, for Pectinida
- Life habit
- epifaunalPBDB, for Pectinida
- Motility
- stationaryPBDB
- Vision
- blindPBDB, for Bivalvia
- Environment
- marinePBDB, for Pectinida
Time the record covers
At least 193 million years on record.
The record covers at least 259.857 Mya to 66 Mya. No occurrence read is dated outside 264.28 Mya to 61.66 Mya.
1,223 occurrences of Oxytomidae on record, most of them in the Early Jurassic. 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
1,223 occurrences- Permianunder 1%
- Early Triassicunder 1%
- Middle Triassic3%
- Late Triassic14%
- Early Jurassic39%
- Middle Jurassic19%
- Late Jurassic11%
- Early Cretaceous9%
- Late Cretaceous6%
- Paleoceneunder 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. More on what this infers.
Found in
205 formations
- Whitby Mudstone Formation72
- Kap Leslie Formation38
- Peschanka Formation27
- Chari Formation26
- Fernie Formation19
- Lower Lias Formation · Lias Group18
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The named rock units Oxytomidae has been recovered from, largest first. Drawn where the rock is now, not where it formed. 181 further formations hold fewer occurrences each and are not listed. 460 occurrences have no formation on record, which is common for older literature.
Oxytomidae and its relatives
Early JurassicWhere Oxytomidae and its relatives were recorded in the Early Jurassic.
Found in the same rock
1,107 taxa- Oxytoma93 sites
- Meleagrinella65 sites
- Oxytoma inequivalvis62 sites
- Astarte56 sites
- Camptonectes49 sites
- Plagiostoma44 sites
- Entolium39 sites
- Grammatodon38 sites
- Pleuromya38 sites
- Isocyprina37 sites
- Ammonoidea36 sites
- Entolium orbiculare36 sites
- Isognomon36 sites
- Pleuromya uniformis35 sites
- Palaeonucula34 sites
- Belemnitida32 sites
- Liostrea31 sites
- Protocardia30 sites
- Pinna29 sites
- Pseudomelania29 sites
- Buchia mosquensis28 sites
- Nanogyra (Nanogyra) nana28 sites
- Parallelodon27 sites
- Taimyrothyris24 sites
The Paleobiology Database records 969 sites for Oxytomidae, 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
221 references- The Impact of Global Warming and Anoxia on Marine Benthic Community Dynamics: an Example from the Toarcian (Early Jurassic)87
- Early Jurassic Bivalvia of western Canada. Part I. Subclasses Palaeotaxodonta, Pteriomorpha, and Isofilibranchia57
- The Lower Jurassic Rocks of East Greenland Part 151
- Markevich and Zakharov, 200436
- Unpublished data from Kachchh30
- Hettangian through Aalenian (Jurassic) guide fossils and biostratigraphy, Northern Yukon and adjacent Northwest Territories30
- The Stratigraphical Palaeontology, ammonites excluded, of the Stowell Park borehole30
- Faunal dynamics of bivalves and scaphopods in the Bathonian (Middle Jurassic) ore-bearing clays at Gnaszyn, Kraków-Silesia Homocline, Poland28
- Unpublished data28
- Genesis and environmental significance of Upper Cretaceous shell concentrations from the Cauvery Basin, southern India28
- Triassic-Jurassic stratigraphy and Bivalvia of northern Priokhotye.25
- The Jurassic-Cretaceous Boundary and the Berriasian Stage in the Boreal Realm24
Each of the 1,223 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. 209 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 Oxytomidae
- Source
- iDigBio
- Credit
- via iDigBio
- Licence
- CC0
- Commercial use
- the licence allows it
No 3D scan of Oxytomidae was found in MorphoSource and Sketchfab.
Smithsonian Open Access was 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 itOxytomoidea through timeFormations of the Early JurassicThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Ichikawa 1958