Trachycardium
Trachycardium is a genus of molluscs in the family Cardiidae.

Hectonichus · 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
- TrachycardiinaePBDB
- Diet
- suspension feederPBDB
- Life habit
- infaunalPBDB
- Motility
- facultatively mobilePBDB
- Vision
- blindPBDB, for Bivalvia
Time the record covers
At least 106 million years on record.
The record covers at least 106.3 Mya to 11.7 ka. No occurrence read is dated outside 113.2 Mya to 0 Mya.
709 occurrences of Trachycardium on record, most of them in the Late Cretaceous. 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
709 occurrences- Early Cretaceous6%
- Late Cretaceous33%
- Paleoceneunder 1%
- Eocene4%
- Oligocene3%
- Miocene28%
- Pliocene7%
- Pleistocene17%
- 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
132 formations
- Providence Formation66
- Escondido Formation60
- Gatun Formation38
- Kiowa Formation35
- Corsicana Marl Formation24
- Cercado Formation23
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The named rock units Trachycardium has been recovered from, largest first. Drawn where the rock is now, not where it formed. 108 further formations hold fewer occurrences each and are not listed. 79 occurrences have no formation on record, which is common for older literature.
Trachycardium and its relatives
Late CretaceousWhere Trachycardium and its relatives were recorded in the Late Cretaceous.
Found in the same rock
752 taxa- Cymbophora115 sites
- Anomia argentaria107 sites
- Striarca104 sites
- Syncyclonema93 sites
- Nuculana92 sites
- Cyprimeria90 sites
- Corbula85 sites
- Turritella84 sites
- Cubitostrea tecticosta81 sites
- Turritella trilira79 sites
- Crassatella vadosa78 sites
- Crenella serica76 sites
- Serpula74 sites
- Camptonectes bubonis73 sites
- Ostrea71 sites
- Granocardium70 sites
- Vertebrata70 sites
- Anomia ornata69 sites
- Bryozoa67 sites
- Turritella bilira67 sites
- Euspira rectilabrum64 sites
- Gabbigonia eufaulensis64 sites
- Veniella conradi64 sites
- Hamulus onyx62 sites
The Paleobiology Database records 489 sites for Trachycardium, 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
159 references- Upper Cretaceous (Maestrichtian) larger invertebrate Fossils from the Haustator bilira Assemblage Zone in the west gulf Coastal Plain86
- Upper Cretaceous (Maestrichtian) larger invertebrates from the Haustator bilira Assemblage Zone in the Atlantic Coastal Plain with further data for the East Gulf71
- Upper Cretaceous (Maestrichtian) Mollusca from the Haustator bilira Assemblage Zone in the East Gulf Coastal Plain41
- Paleoecology and Paleontology of the Lower Cretaceous Kiowa Formation, Kansas35
- Geology and paleontology of canal zone and adjoing parts of Panama: Description of Tertiary mollusks (Pelecypods: Propeamussiidae to Cuspidariidae).28
- The Molluscan Fauna of the Alum Bluff Group of Florida28
- Unpublished census data from Atlantic coastal plain and circum-Caribbean Neogene assemblages and taxonomic opinions26
- Neogene Paleontology in the Northern Dominican Republic 9. The Family Cardiidae (Mollusca: Bivalvia)25
- A paleobiotic survey of Caribbean faunas from the Neogene of the Isthmus of Panama12
- Late Pleistocene molluscan assemblages from the coral reefs of the Kenya coast10
- Lower Oligocene Bivalvia of the Vicksburg Group in Mississippi10
- Unpublished notes on Caribbean collection of Jack and Winifred Gibson-Smith, Naturhistorisches Museum Basel8
Each of the 709 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. 147 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 Trachycardium
- Source
- Wikipedia/Commons
- Credit
- Hectonichus
- 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
- Trachycardium egmontianum · FMNH:Invertebrate Zoology:176760
Smithsonian Open Access was not reached for this taxon, so this list is what the others held rather than everything there is.
The description on this site
- 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 itTrachycardiinae through timeFormations of the Late CretaceousThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. (Mörch 1853)