Mactromeris ramonensis

Smithe, Warren · CC0 · 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
- MactromerisPBDB
- Diet
- suspension feederPBDB, for Mactridae
- Life habit
- infaunalPBDB, for Mactridae
- Motility
- facultatively mobilePBDB, for Mactridae
- Vision
- blindPBDB, for Bivalvia
Time the record covers
At least 10 million years on record.
The record covers at least 37.71 Mya to 27.3 Mya. No occurrence read is dated outside 56 Mya to 23.04 Mya.
38 occurrences of Mactromeris ramonensis 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
38 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
7 formations
- San Emigdio Formation · San Lorenzo Group21
- Pleito Formation · San Lorenzo Group8
- Temblor Formation2
- Poul Creek Formation2
- Yakataga Formation1
- Pysht Formation1
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The named rock units Mactromeris ramonensis has been recovered from, largest first. Drawn where the rock is now, not where it formed. 2 occurrences have no formation on record, which is common for older literature.
Mactromeris ramonensis and its relatives
EoceneWhere Mactromeris ramonensis and its relatives were recorded in the Eocene.
Found in the same rock
137 taxa- Antigona (Ventricola) undosa19 sites
- Natica recluziana16 sites
- Siphonalia (Kelletia) merriami16 sites
- Yoldia (Portlandia) cooperii15 sites
- Amiantis mathewsoni12 sites
- Bullia (Buccinanops) clarki11 sites
- Cardium10 sites
- Dentalium10 sites
- Solena (Plectosolen) conradi10 sites
- Mytilus (Mytilus) arnoldi9 sites
- Pseudocardium packardi9 sites
- Bruclarkia gravida8 sites
- Acila (Truncacila) shumardi7 sites
- Dosinia (Dosinia) whitneyi7 sites
- Fusinus (Priscofusus) hecoxi6 sites
- Hemifusus lincolnensis6 sites
- Here excavata6 sites
- Mactromeris rushi6 sites
- Molopophorus dalli6 sites
- Olequahia lincolnensis6 sites
- Turritella variata lorenzana6 sites
- Agasoma acuminatum5 sites
- Calyptraea diegoana5 sites
- Epitonium (Boreoscala) condoni5 sites
The Paleobiology Database records 36 sites for Mactromeris ramonensis, 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
6 references- The San Lorenzo Group of the San Emigdio region, California24
- Stratigraphy and sedimentology of the Eocene Tejon Formation, western Tehachapi and San Emigdio mountains, California5
- Fauna of the Poul and Yakataga Formations (Upper Oligocene) of Southern Alaska3
- Oligocene molluscan biostratigraphy and paleontology of the Lower Part of the type Temblor Formation, California2
- Megafaunal zones of the Oligocene of northwestern Washington2
- The San Lorenzo series of Middle California. a stratigraphic and paleontologic study of the San Lorenzo Oligocene series of the general region of Mount Diablo, California2
Each of the 38 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. 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 Mactromeris ramonensis
- Source
- GBIF
- Credit
- Smithe, Warren
- Licence
- CC0
- Commercial use
- the licence allows it
No 3D scan was found. Smithsonian Open Access, MorphoSource and Sketchfab were all searched.
This is what the site found, which is not the same as what exists.
Keep going
What may have been alongside itMactromeris through timeFormations of the EoceneThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. (Packard 1916)