Podotremata
Podotremata is a traditionally used section of crabs (Brachyura), now considered to be invalid. It was the smaller grouping of crabs, separate from the larger Eubrachyura section. Morphological and molecular analyses do not reveal a monophyletic Podotremata, but rather that it is paraphyletic, and so the most recent classifications divide "Podotremata" into three sections: Dromiacea, Cyclodorippoidea and Raninoida.

No machine-readable author provided. Sasquatch assumed (based on copyright claims). · 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
- BrachyuraPBDB
- Diet
- carnivorePBDB, for Decapoda
- Life habit
- epifaunalPBDB, for Decapoda
- Motility
- actively mobilePBDB, for Malacostraca
- Vision
- well-developedPBDB, for Malacostraca
Time the record covers
At least 125 million years on record.
The record covers at least 125.77 Mya to 11.7 ka. No occurrence read is dated outside 132.6 Mya to 0 Mya.
729 occurrences of Podotremata on record, most of them in the Eocene. The Paleobiology Database records this as a living group. 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
729 occurrences- Early Cretaceous13%
- Late Cretaceous34%
- Paleocene6%
- Eocene36%
- Oligocene4%
- Miocene4%
- Pliocene2%
- Pleistoceneunder 1%
- Holoceneunder 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
179 formations
- La Meseta Formation25
- Lookingglass Formation15
- Pierre Shale Formation · Montana Group12
- Castle Hayne Formation9
- Pawpaw Formation · Washita Group9
- Maastricht Formation9
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The named rock units Podotremata has been recovered from, largest first. Drawn where the rock is now, not where it formed. 155 further formations hold fewer occurrences each and are not listed. 298 occurrences have no formation on record, which is common for older literature.
Podotremata and its relatives
EoceneWhere Podotremata and its relatives were recorded in the Eocene.
Found in the same rock
2,306 taxa- Lyreidus antarcticus22 sites
- Lophoranina marestiana10 sites
- Ostrea10 sites
- Callianassa9 sites
- Turritella9 sites
- Dentalium8 sites
- Macroacaena alseanus8 sites
- Ranina8 sites
- Raninoides morrisi8 sites
- Chlamys7 sites
- Joeranina japonica7 sites
- Conus6 sites
- Iphiculus sexspinosus6 sites
- Lucina6 sites
- Nucula6 sites
- Palaeograpsus inflatus6 sites
- Pecten6 sites
- Pinna6 sites
- Raninoides6 sites
- Xanthias miocenicus6 sites
- Anchura5 sites
- Calappilia hondoensis5 sites
- Callianassidae5 sites
- Cenomanocarcinus vanstraeleni5 sites
The Paleobiology Database records 448 sites for Podotremata, 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
245 references- A revision of the Palaeocorystoidea and the phylogeny of raninoidian crabs (Crustacea, Decapoda, Brachyura, Podotremata)58
- Fossil Crustacea of the Atlantic and Gulf Coastal Plain27
- Crustacés décapodes nouveaux ou peu connus de l'époque Crétacique26
- Decapod crustaceans from the Eocene La Meseta Formation, Seymour Island, Antarctica: a model for preservation of decapods20
- The fossil stalk-eyed Crustacea of the Pacific slope of North America19
- Lyreidus alseanus Rathbun from the Paleogene of Washington and Oregon, U.S.A.13
- Crostacei decapodi del "Tufo A Lophoranina" (Luteziano inferiore) dalla valle del Chiampo (Vincenza-Italia Nordorientale)12
- The Early Eocene decapod crustacean fauna of the Lookingglass Formation, Oregon11
- I crostacei Notopodinae (Brachyura, Raninidae) del Terziario del Vicentino (Italia Settentrionale)11
- Late Cretaceous crabs from Japan11
- Upper Cretaceous Crustacea from Mexico and Colombia: similar faunas and environments during Turonian times10
- Late Cretaceous and Paleocene decapod crustaceans from James Ross Basin, Antarctic Peninsula10
Each of the 729 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. 233 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 Podotremata
- Source
- Wikipedia/Commons
- Credit
- No machine-readable author provided. Sasquatch assumed (based on copyright claims).
- Licence
- CC BY-SA 3.0
- Commercial use
- the licence allows it
No 3D scan was found. Smithsonian Open Access, MorphoSource and Sketchfab were all searched.
The description on this site
- Source
- Wikipedia, “Podotremata”
- 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 itBrachyura through timeFormations of the EoceneThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Guinot 1977