Periploma
Periglypta is a genus of bivalves in the family Periplomatidae.

Manuel CABALLER · CC BY 4.0 · 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
- PeriplomatidaePBDB
- Diet
- suspension feederPBDB
- Life habit
- infaunalPBDB
- Motility
- facultatively mobilePBDB
- Vision
- blindPBDB, for Bivalvia
Time the record covers
At least 113 million years on record.
The record covers at least 113.2 Mya to 11.7 ka. No occurrence read is dated outside 121.4 Mya to 0 Mya.
303 occurrences of Periploma 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
303 occurrences- Early Cretaceousunder 1%
- Late Cretaceous8%
- Paleocene9%
- Eocene32%
- Oligocene15%
- Miocene26%
- Pliocene4%
- Pleistocene4%
- Holocene2%
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
127 formations
- La Meseta Formation18
- Moodys Branch Formation · Jackson Group12
- Cook Mountain Formation · Claiborne Group12
- Submeseta Formation11
- Shoal River Formation · Alum Bluff Group9
- Narrow Cape Formation7
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The named rock units Periploma has been recovered from, largest first. Drawn where the rock is now, not where it formed. 103 further formations hold fewer occurrences each and are not listed. 27 occurrences have no formation on record, which is common for older literature.
Periploma and its relatives
EoceneWhere Periploma and its relatives were recorded in the Eocene.
Found in the same rock
3,897 taxa- Nuculana41 sites
- Turritella35 sites
- Nucula26 sites
- Pitar26 sites
- Anomia22 sites
- Yoldia22 sites
- Dentalium20 sites
- Tellina20 sites
- Cadulus19 sites
- Eurhomalea newtoni19 sites
- Ostrea19 sites
- Polinices19 sites
- Polinices (Polinices) subtenuis18 sites
- Corbula17 sites
- Cyclocardia17 sites
- Macoma17 sites
- Crassatella16 sites
- Architectonica15 sites
- Latirus15 sites
- Natica15 sites
- Panopea15 sites
- Pyramidella15 sites
- Saxolucina sharmani15 sites
- Venericardia15 sites
The Paleobiology Database records 182 sites for Periploma, and this reads all of them. Of that, one read hit the database's own return limit, so every count below is a floor rather than a total. 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
90 references- Neogene and Paleogene Molluscan (Bivalvia) Cenozones of the Russian Northeast.35
- Molluscan Systematics and Biostratigraphy29
- Neogene and Paleogene Molluscan (Bivalvia) Cenozones of Sakhalin and Kurile Islands23
- Catalogue of the Paleocene and Eocene mollusca of the southern and eastern United States. Part 1. Pelecypoda, Amphineura, Pteropoda, Scaphopoda and Cephalopoda19
- Resilience of marine invertebrate communities during the early Cenozoic hyperthermals16
- Fossil assemblages of a marine transgressive sand, Moody''s Branch Formation (Upper Eocene), Louisiana and Mississippi11
- A late Oligocene or earliest Miocene molluscan fauna from Sitkinak Island, Alaska9
- Paleogene molluscan faunas from the Kushiro Coal Field, Eastern Hokkaido8
- El genero Cancellaria en el Mioceno de Chile con descripcion de cuatro especies nuevas (Gaastropoda: Cancellariidae)8
- Impact of lithification on the diversity, size distribution, and recovery dynamics of marine invertebrate assemblages7
- Unpublished data on Cretaceous-Paleocene molluscan assemblages7
- The Molluscan Fauna of the Alum Bluff Group of Florida6
Each of the 303 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. 78 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 Periploma
- Source
- Wikipedia/Commons
- Credit
- Manuel CABALLER
- Licence
- CC BY 4.0
- 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
- Periploma margaritaceum · USNM:IZ:USNM 608799
The description on this site
- Source
- Wikipedia, “Periploma”
- 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 itPeriplomatidae through timeFormations of the EoceneThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Schumacher 1816