Orbitoplax

Uncredited · via Wikidata/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
- EuryplacidaePBDB
- 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 20 million years on record.
The record covers at least 48.07 Mya to 27.3 Mya. No occurrence read is dated outside 56 Mya to 15.98 Mya.
22 occurrences of Orbitoplax on record, most of them in the Eocene. 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
22 occurrencesThese 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
9 formations
- Lookingglass Formation7
- Llajas Formation2
- Mission Valley Formation · Poway Group2
- Poul Creek Formation1
- Tejon Formation1
- Martinez Formation1
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The named rock units Orbitoplax has been recovered from, largest first. Drawn where the rock is now, not where it formed. 5 occurrences have no formation on record, which is common for older literature.
Orbitoplax and its relatives
EoceneWhere Orbitoplax and its relatives were recorded in the Eocene.
Found in the same rock
65 taxa- Eriosachila orri5 sites
- Rogueus orri5 sites
- Palaeopinnixa rathbunae4 sites
- Panopeus baldwini4 sites
- Raninoides vaderensis4 sites
- Ctenocheles hokoensis2 sites
- Llajassus caesius2 sites
- Acutostrea idriaensis1 site
- Aethridae1 site
- Archaeozius occidentalis1 site
- Astropecten matilijaensis1 site
- Bellhexapus granulatus1 site
- Brochopleurus1 site
- Calappilia dacica1 site
- Calappilia scopuli1 site
- Calyptraea diegoana1 site
- Carinaranina naselensis1 site
- Ctenocheles possagnoensis1 site
- Delectopecten1 site
- Dentalium (Laevidentalium) calafium1 site
- Domenginella claytonensis1 site
- Eocernina hannibali1 site
- Eonomus californianus1 site
- Fusiturricula (Crenaturricula) crenatospira domenginica1 site
The Paleobiology Database records 16 sites for Orbitoplax, 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
9 references- The Early Eocene decapod crustacean fauna of the Lookingglass Formation, Oregon6
- The fossil stalk-eyed Crustacea of the Pacific slope of North America6
- New Eocene decapods (Thalassinidea and Brachyura) from Southern California3
- Megapaleontology of the Eocene Llajas Formation, Simi Valley, California2
- Nuovo contributo alla conoscenza dei crostacei decapodi della marna di Possagno (Eocene superiore - Italia settentrionale)1
- Macropaleontology of Eocene marine rocks, upper Sespe Creek area, Ventura County, southern California1
- Paleontology and stratigraphy of Eocene rocks at Pulali Point, Jefferson County, Olympic Peninsula, Washington1
- Fossil Decapod Crustaceans from the Lower Tertiary of the Prince Willam Sound Region, Gulf of Alaska1
- Oregon Eocene decapod Crustacea1
Each of the 22 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. 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 Orbitoplax
- Source
- Wikidata/Commons
- Credit
- nobody named on the record
- Licence
- not stated by the source
- Commercial use
- cannot be read from the licence given — check the record
No 3D scan of Orbitoplax 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.
This is what the site found, which is not the same as what exists.
Keep going
What may have been alongside itEuryplacidae through timeFormations of the EoceneThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Tucker and Feldmann 1990