Schizodus
Schizodus is an extinct genus of shallow marine clams. It lived from the Silurian to Late Permian periods.
via iDigBio · CC BY-NC-SA · 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
- SchizodidaePBDB
- Diet
- suspension feederPBDB, for Trigoniida
- Life habit
- infaunalPBDB, for Trigoniida
- Motility
- facultatively mobilePBDB, for Trigoniida
- Vision
- blindPBDB, for Bivalvia
Time the record covers
At least 219 million years on record.
The record covers at least 425 Mya to 205.7 Mya. No occurrence read is dated outside 430.6 Mya to 174.7 Mya.
761 occurrences of Schizodus on record, most of them in the Permian. 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
761 occurrences- Silurianunder 1%
- Devonian2%
- Carboniferous30%
- Permian66%
- Late Triassicunder 1%
- Early Jurassicunder 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
209 formations
- Ford Formation32
- Graham Formation · Cisco Group30
- Park City Formation28
- Chhidru Formation27
- Phosphoria Formation25
- Zechstein Formation20
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The named rock units Schizodus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 185 further formations hold fewer occurrences each and are not listed. 77 occurrences have no formation on record, which is common for older literature.
Schizodus and its relatives
PermianWhere Schizodus and its relatives were recorded in the Permian.
Found in the same rock
2,218 taxa- Aviculopecten67 sites
- Composita40 sites
- Permophorus40 sites
- Crinoidea33 sites
- Edmondia33 sites
- Meekospira30 sites
- Nuculopsis30 sites
- Euphemites28 sites
- Bellerophontoidea26 sites
- Naticopsis23 sites
- Orbiculoidea23 sites
- Polidevcia23 sites
- Composita subtilita22 sites
- Derbyia22 sites
- Chonetes21 sites
- Sanguinolites21 sites
- Trepostomata21 sites
- Goniasma20 sites
- Cleiothyridina19 sites
- Fenestella19 sites
- Parajuresania nebrascensis19 sites
- Parallelodon19 sites
- Linoproductus18 sites
- Bakevellia17 sites
The Paleobiology Database records 634 sites for Schizodus, 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
191 references- The surficial geology, paleontology, and paleoecology of the Finis Shale (Pennsylvanian, Lower Virgilian) in Jack County, Texas26
- Biostratigraphy of the Phosphoria, Park City, and Shedhorn Formations; Geology of Permian Rocks in the Western Phosphate Field23
- Parallel evolution in early trigonacean bivalves22
- Permian and Eotriassic bivalves of the middle Rockies22
- Brachiopoda and Mollusca from the Productus limestones of the Salt Range22
- Stratigraphy and Paleontology of the Uppermost Pennsylvanian and Lowermost Permian Rocks in Kansas21
- Monograph of the Permian fossils of England21
- Permskaya sistema Pribaltiki (fauna i stratigrafiya). Permian deposits of the Baltic region (stratigraphy and fauna)20
- Early Permian fossil communities in northeastern Nevada and northwestern Utah18
- Riedel, 191718
- Type and reference sections of the Middle and Upper Permian of the Volga and Kama River Regions: A Field Guidebook of XVIII International Congress on Carboniferous and Permian17
- Bivalves from the upper part of the Permian in southern Hunan, China15
Each of the 761 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. 179 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 Schizodus
- Source
- iDigBio
- Credit
- via iDigBio
- Licence
- CC BY-NC-SA
- Commercial use
- the licence does not allow it
3D model
- Source
- Sketchfab
- Licence
- CC Attribution-NonCommercial
- Commercial use
- the licence does not allow it
The description on this site
- Source
- Wikipedia, “Schizodus”
- 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 itSchizodidae through timeFormations of the PermianThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. (King 1844)