Brachidontes (Brachidontes) cowlitzensis

via GBIF · CC BY 4.0 · via GBIF. 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
- Brachidontes (Brachidontes)PBDB
- Diet
- suspension feederPBDB, for Brachidontes
- Life habit
- epifaunalPBDB, for Brachidontes
- Motility
- stationary, attachedPBDB, for Brachidontes
- Vision
- blindPBDB, for Bivalvia
- Environment
- lagoonal,coastal,inner shelf,outer shelf,oceanic,brackish,freshwaterPBDB, for Mytilidae
Time the record covers
At least 18 million years on record.
The record covers at least 56 Mya to 37.71 Mya. No occurrence read is dated outside 59.24 Mya to 33.9 Mya.
65 occurrences of Brachidontes (Brachidontes) cowlitzensis 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
65 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
21 formations
- Meganos Formation10
- Llajas Formation9
- Matilija Formation6
- White Tail Ridge Formation · Umpqua Group5
- Mission Valley Formation · Poway Group5
- Santiago Formation4
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The named rock units Brachidontes (Brachidontes) cowlitzensis has been recovered from, largest first. Drawn where the rock is now, not where it formed. 1 occurrence has no formation on record, which is common for older literature.
Brachidontes (Brachidontes) cowlitzensis and its relatives
EoceneWhere Brachidontes (Brachidontes) cowlitzensis and its relatives were recorded in the Eocene.
Found in the same rock
558 taxa- Calyptraea diegoana20 sites
- Scaphander (Mirascapha) costatus18 sites
- Nemocardium (Nemocardium) linteum17 sites
- Pachycrommium clarki17 sites
- Schedocardia brewerii17 sites
- Polinices (Euspira) nuciformis15 sites
- Cylichnina tantilla14 sites
- Microcallista (Costacallista) conradiana13 sites
- Acila (Truncacila) decisa12 sites
- Ficopsis remondii12 sites
- Corbula (Caryocorbula) dickersoni9 sites
- Ectinochilus (Macilentos) macilentus9 sites
- Glycymeris (Glycymerita) sagittata9 sites
- Pseudocardium meganosensis9 sites
- Sinum obliquum9 sites
- Tejonia moragai9 sites
- Turritella buwaldana9 sites
- Eocernina hannibali8 sites
- Gari (Gobraeus) hornii8 sites
- Nuculana (Saccella) gabbii8 sites
- Ostrea8 sites
- Pitaria californiana8 sites
- Polinices hornii8 sites
- Bonellitia (Admetula) paucivaricata7 sites
The Paleobiology Database records 65 sites for Brachidontes (Brachidontes) cowlitzensis, 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
24 references- Geologic Map and Database of the Roseburg 30 x 60' Quadrangle, Douglas and Coos Counties, Oregon10
- The geology and paleontology of the type section of the Meganos Formation (lower Middle Eocene) of California10
- Megapaleontology of the Eocene Llajas Formation, Simi Valley, California9
- Eocene molluscan stages and their correlation, San Diego area, California6
- Geology of the Northern Santa Ana Mountains, California4
- Eocene molluscan paleontology of the Whitaker Peak area, Los Angeles and Ventura counties, California3
- Oligocene biostratigraphy of the Santa Barbara embayment, California: Part II: Mollusca from the Turritella variata zone3
- Geology of the coast ranges immediately north of the San Francisco Bay region, California3
- Macropaleontology of the Eocene Crescent Formation in the Little River Area, Southern Olympic Peninsula, Washington2
- Eocene megapaleontology, stratigraphy, and depositional environments, Elsmere Canyon, Los Angeles County, California1
- Marine fauna of the middle Eocene Tukwila Formation, King County1
- Paleoecological anlaysis of molluscan assemblages from the Middle Eocene Cowlitz Formation, southwestern Washington1
Each of the 65 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. 12 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 Brachidontes (Brachidontes) cowlitzensis
- Source
- GBIF
- Credit
- via GBIF
- Licence
- CC BY 4.0
- 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
- Brachidontes exustus · FMNH:Invertebrate Zoology:188293
This is what the site found, which is not the same as what exists.
Keep going
What may have been alongside itBrachidontes (Brachidontes) through timeFormations of the EoceneThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. (Weaver and Van Winkle Palmer 1922)