Perissolax

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
- FicidaePBDB
- Diet
- carnivorePBDB, for Ficidae
- Life habit
- epifaunalPBDB, for Ficidae
- Motility
- actively mobilePBDB, for Ficidae
- Vision
- limitedPBDB, for Gastropoda
Time the record covers
At least 12 million years on record.
The record covers at least 72.2 Mya to 59.24 Mya. No occurrence read is dated outside 83.6 Mya to 56 Mya.
12 occurrences of Perissolax on record, most of them in the Paleocene. 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
12 occurrences- Late Cretaceous17%
- Paleocene83%
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
8 formations
- Porters Creek Formation · Midway Group3
- Vincentown Formation · Pamunkey Group2
- Tuscahoma Formation · Wilcox Group2
- Midway Formation1
- Ripley Formation1
- Martinez Formation1
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The named rock units Perissolax has been recovered from, largest first. Drawn where the rock is now, not where it formed.
Perissolax and its relatives
PaleoceneWhere Perissolax and its relatives were recorded in the Paleocene.
Found in the same rock
546 taxa- Turritella6 sites
- Cadulus5 sites
- Corbula4 sites
- Cucullaea4 sites
- Falsifusus4 sites
- Glycymeris4 sites
- Natica4 sites
- Pitar4 sites
- Agaronia3 sites
- Architectonica3 sites
- Calyptraphorus3 sites
- Caricella3 sites
- Dentalium3 sites
- Euspira3 sites
- Exilia pergracilis3 sites
- Gemmula (Coronia)3 sites
- Mesalia alabamiensis3 sites
- Nucula3 sites
- Nucula (Nucula) mediavia3 sites
- Orthosurcula3 sites
- Ostrea3 sites
- Panopea3 sites
- Pleurotomella3 sites
- Priscoficus3 sites
The Paleobiology Database records 9 sites for Perissolax, 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
10 references- Stratigraphic Distribution of Paleocene and Eocene Fossils in the Eastern Gulf Coast Region2
- Catalogue of the Paleocene and Eocene mollusca of the southern and eastern United States. Part 1. Pelecypoda, Amphineura, Pteropoda, Scaphopoda and Cephalopoda2
- Resilience of marine invertebrate communities during the early Cenozoic hyperthermals1
- Impact of lithification on the diversity, size distribution, and recovery dynamics of marine invertebrate assemblages1
- Macrofossils from the Vincentown Formation (Paleocene) of New Jersey1
- Catalogue of the Paleocene and Eocene Mollusks of the Southern and Eastern United States Part II. Gastropoda1
- Mollusca of the Tertiary formations of Northeastern Mexico1
- Cretaceous geology of Lower California1
- The fauna of the Ripley formation on Coon creek, Tennessee1
- Stratigraphy and fauna of the Tejon Eocene of California1
Each of the 12 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 Perissolax
- Source
- iDigBio
- Credit
- via iDigBio
- Licence
- CC0
- Commercial use
- the licence allows it
No 3D scan of Perissolax 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 itFicidae through timeFormations of the PaleoceneThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Gabb 1861