Platysomus
Platysomus is an extinct genus of ray-finned fish that lived in the Carboniferous and Permian periods. Fossils have been found worldwide.

Haplochromis · CC BY-SA 3.0 · 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
- PlatysomidaePBDB
- Motility
- actively mobilePBDB, for Osteichthyes
Time the record covers
At least 102 million years on record.
The record covers at least 346.7 Mya to 244.4 Mya. No occurrence read is dated outside 358.86 Mya to 241.464 Mya.
140 occurrences of Platysomus 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
140 occurrences- Carboniferous31%
- Permian64%
- Early Triassic4%
- Middle Triassicunder 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
49 formations
- Amanakskaya Formation9
- Wild Cow Formation · Madera Group8
- Scottish Lower Coal Measures Formation8
- Pennine Lower Coal Measures Formation · Pennine Coal Measures Group7
- Raisby Formation6
- Pennine Middle Coal Measures Formation · Pennine Coal Measures Group6
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The named rock units Platysomus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 25 further formations hold fewer occurrences each and are not listed. 17 occurrences have no formation on record, which is common for older literature.
Platysomus and its relatives
PermianWhere Platysomus and its relatives were recorded in the Permian.
Found in the same rock
684 taxa- Elonichthys16 sites
- Kargalichthys efremovi14 sites
- Pygopterus humboldti12 sites
- Acrolepis sedgwickii10 sites
- Varialepis bergi10 sites
- Diplostraca9 sites
- Palaeoniscum9 sites
- Palaeoniscus freieslebeni9 sites
- Acanthodes8 sites
- Mesonichthys aitkeni8 sites
- Palaeomutela8 sites
- Palaeoniscum freieslebeni8 sites
- Prasuchonella8 sites
- Acropholis7 sites
- Coelacanthus granulatus7 sites
- Dunbarella7 sites
- Gastropoda7 sites
- Kichkassia furcae7 sites
- Palaeostrugia rhombifera7 sites
- Paleodarwinula7 sites
- Rhadinichthys7 sites
- Uranichthys pretoriensis7 sites
- Acrolepis6 sites
- Actinopterygii6 sites
The Paleobiology Database records 111 sites for Platysomus, and this reads all 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
50 references- Upper Permian vertebrates and their sedimentological context in the South Urals, Russia19
- 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 Permian10
- The early diversification of ray-finned fishes (Actinopterygii): hypotheses, challenges and future prospects8
- Catalogue of the Fossil Fishes in the British Museum (Natural History). Part II8
- An early actinopterygian ichthyofauna from the Scottish Lower Coal Measures Formation: Westphalian A (Bashkirian)7
- Ichthyofauna of the Permian of European Russia5
- Fish Remains from the North Wales Coalfield5
- Monograph of the Permian fossils of England5
- New Ray-Finned Fishes (Actinopterygii, Osteichthyes) from the Permian of European Russia4
- A new species of Burguklia (Pisces, Actinopterygii) from the Middle Permian of the Volga Region (European Russia)4
- Type and reference sections of the Permian–Triassic continental sequences of the East European Platform: main isotope, magnetic, and biotic events4
- Event stratigraphy and correlation of marine deposits in the Kazanian Stage of the stratotypic region4
Each of the 140 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. 38 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 Platysomus
- Source
- Wikipedia/Commons
- Credit
- Haplochromis
- Licence
- CC BY-SA 3.0
- Commercial use
- the licence allows it
CT scan
- Source
- MorphoSource
- Licence
- not stated by the source
- Commercial use
- cannot be read from the licence given — check the record
- Specimen
- Platysomus parvulus · nms:g:1894.73.456
The description on this site
- Source
- Wikipedia, “Platysomus”
- 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 itPlatysomidae through timeFormations of the PermianThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Agassiz 1833