Sinum obliquum

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
- SinumPBDB
- Diet
- carnivorePBDB, for Sinum
- Life habit
- semi-infaunalPBDB, for Sinum
- Motility
- actively mobilePBDB, for Sinum
- Vision
- limitedPBDB, for Gastropoda
Time the record covers
At least 22 million years on record.
The record covers at least 56 Mya to 33.9 Mya. No occurrence read is dated outside 66 Mya to 27.3 Mya.
37 occurrences of Sinum obliquum 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
37 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
18 formations
- Eugene Formation8
- Cowlitz Formation4
- Tejon Formation4
- Keasey Formation3
- Llajas Formation3
- Mission Valley Formation · Poway Group3
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The named rock units Sinum obliquum has been recovered from, largest first. Drawn where the rock is now, not where it formed.
Sinum obliquum and its relatives
EoceneWhere Sinum obliquum and its relatives were recorded in the Eocene.
Found in the same rock
536 taxa- Calyptraea diegoana14 sites
- Polinices (Euspira) nuciformis12 sites
- Nuculana (Saccella) washingtonensis11 sites
- Schedocardia brewerii10 sites
- Brachidontes (Brachidontes) cowlitzensis9 sites
- Bruclarkia8 sites
- Dentalium (Fissidentalium) laneensis8 sites
- Ficopsis remondii8 sites
- Glossaulax reclusiana8 sites
- Glycymeris (Glycymerita) sagittata8 sites
- Polinices washingtonensis8 sites
- Tellina8 sites
- Turritella buwaldana8 sites
- Acila (Truncacila) decisa7 sites
- Parvicardium eugenense7 sites
- Solena (Eosolen) eugenensis7 sites
- Spirocrypta pileum7 sites
- Olivella mathewsonii6 sites
- Pachycrommium clarki6 sites
- Priscoficus cowlitzensis6 sites
- Procerapex bentsonae6 sites
- Scaphander (Mirascapha) costatus6 sites
- Solen sicarius6 sites
- Tellina pittsburgensis6 sites
The Paleobiology Database records 36 sites for Sinum obliquum, 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
20 references- The Oligocene marine molluscan fauna of the Eugene Formation in Oregon8
- Paleoecological anlaysis of molluscan assemblages from the Middle Eocene Cowlitz Formation, southwestern Washington3
- Paleogene Marine Gastropods of the Keasey Formation in Oregon3
- Eocene molluscan stages and their correlation, San Diego area, California3
- Stratigraphy and sedimentology of the Eocene Tejon Formation, western Tehachapi and San Emigdio mountains, California2
- Megapaleontology of the Eocene Llajas Formation, Simi Valley, California2
- Megafaunal zones of the Oligocene of northwestern Washington2
- Fauna and stratigraphic relations of the Tejon Eocene at the type locality in Kern County, California2
- Marine fauna of the middle Eocene Tukwila Formation, King County1
- A Middle Eocene marine molluscan assemblage form the usually nonmarine Friars Formation, San Diego County, California1
- Eocene Macropaleontology of Northern Lockwood Valley, Ventura County, California1
- Eocene molluscan paleontology of the Whitaker Peak area, Los Angeles and Ventura counties, California1
Each of the 37 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. 8 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 content1

Picture of Sinum obliquum
- Source
- iDigBio
- Credit
- via iDigBio
- Licence
- CC0
- Commercial use
- the licence allows it
No 3D scan of Sinum obliquum 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 itSinum through timeFormations of the EoceneThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. (Gabb 1864)