Nemocardium
Nemocardium is a genus of bivalves belonging to the family Cardiidae.

User:Nikkimaria · 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
- LaevicardiinaePBDB
- Diet
- suspension feederPBDB, for Cardiidae
- Life habit
- infaunalPBDB, for Cardiidae
- Motility
- facultatively mobilePBDB, for Cardiidae
- Vision
- blindPBDB, for Bivalvia
Time the record covers
At least 119 million years on record.
The record covers at least 119.57 Mya to 129 ka. No occurrence read is dated outside 121.4 Mya to 11.7 ka.
515 occurrences of Nemocardium 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
515 occurrences- Early Cretaceous3%
- Late Cretaceous5%
- Paleocene15%
- Eocene49%
- Oligocene18%
- Miocene8%
- Pliocene1%
- Pleistoceneunder 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
144 formations
- Byram Formation · Vicksburg Group34
- Cook Mountain Formation · Claiborne Group22
- Moodys Branch Formation · Jackson Group17
- Martinez Formation16
- Santa Susana Formation16
- Llajas Formation14
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The named rock units Nemocardium has been recovered from, largest first. Drawn where the rock is now, not where it formed. 120 further formations hold fewer occurrences each and are not listed. 43 occurrences have no formation on record, which is common for older literature.
Nemocardium and its relatives
EoceneWhere Nemocardium and its relatives were recorded in the Eocene.
Found in the same rock
3,366 taxa- Turritella46 sites
- Dentalium45 sites
- Pitar43 sites
- Corbula40 sites
- Venericardia36 sites
- Ostrea34 sites
- Cadulus31 sites
- Tellina29 sites
- Calyptraea (Trochita) aperta28 sites
- Natica26 sites
- Acteon25 sites
- Glycymeris24 sites
- Barbatia22 sites
- Verticordia22 sites
- Clavilithes21 sites
- Corbula engonata21 sites
- Nuculana21 sites
- Odostomia21 sites
- Turricula21 sites
- Crassatella20 sites
- Nucula20 sites
- Nucula vicksburgensis20 sites
- Calyptraea diegoana19 sites
- Limopsis18 sites
The Paleobiology Database records 354 sites for Nemocardium, and this reads 240 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
133 references- Catalogue of the Paleocene and Eocene mollusca of the southern and eastern United States. Part 1. Pelecypoda, Amphineura, Pteropoda, Scaphopoda and Cephalopoda38
- Resilience of marine invertebrate communities during the early Cenozoic hyperthermals30
- Testing for patterns of faunal persistence in the early Oligocene Byram Formation of Mississippi29
- Stratigraphy and Mollusca of the Eocene of western Oregon29
- Lower Oligocene Bivalvia of the Vicksburg Group in Mississippi17
- Fauna of the Martinez Eocene of California15
- Megapaleontology of the Eocene Llajas Formation, Simi Valley, California12
- Stratigraphy and fossil bivalve assemblages of the mid-Cretaceous Goshoura Group, southwest Japan11
- A contribution to the paleontology of the Martinez Eocene of California11
- Neogene and Paleogene Molluscan (Bivalvia) Cenozones of the Russian Northeast.10
- Neogene and Paleogene Molluscan (Bivalvia) Cenozones of Sakhalin and Kurile Islands10
- Unpublished data on Cretaceous-Paleocene molluscan assemblages8
Each of the 515 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. 121 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 Nemocardium
- Source
- Wikipedia/Commons
- Credit
- User:Nikkimaria
- Licence
- CC BY-SA 3.0
- Commercial use
- the licence allows it
CT scan
- Source
- MorphoSource
- Licence
- In Copyright
- Commercial use
- cannot be read from the licence given — check the record
- Specimen
- Nemocardium probatum · fmnh:invertebrate zoology:325858
The description on this site
- Source
- Wikipedia, “Nemocardium”
- 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 itLaevicardiinae through timeFormations of the EoceneThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. (Meek 1876)