Monotis
Searched as Monotis ochotica ochotica. The Paleobiology Database treats Monotis as the accepted name.

Momotarou2012 · CC BY-SA 3.0 · via Wikidata/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
- MonotidaePBDB
- Diet
- suspension feederPBDB, for Pectinida
- Life habit
- epifaunalPBDB, for Pectinida
- Motility
- stationaryPBDB, for Monotidae
- Vision
- blindPBDB, for Bivalvia
- Environment
- marinePBDB, for Pectinida
Time the record covers
At most 22 million years on record.
Every occurrence read is dated to somewhere between 227.3 Mya and 205.7 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.
3 occurrences of Monotis on record, most of them in the Late Triassic. 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
3 occurrences- Late Triassic100%
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
1 formation
Loading coastlines…
The named rock units Monotis 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.
Monotis and its relatives
Late TriassicWhere Monotis and its relatives were recorded in the Late Triassic.
Found in the same rock
985 taxa- Halobia14 sites
- Oxytoma mojsisovicsi14 sites
- Tosapecten subhiemalis14 sites
- Inoceramus ussuriensis12 sites
- Tosapecten10 sites
- Halobia fallax9 sites
- Chlamys mojsisovicsi8 sites
- Tosapecten suzukii8 sites
- Oxytoma7 sites
- Palaeopharus7 sites
- Entolioides6 sites
- Gryphaea keilhaui6 sites
- Oxytoma zitteli6 sites
- Pleuromya6 sites
- Schafhaeutlia6 sites
- Crinoidea5 sites
- Entolium kolymaense5 sites
- Epigondolella bidentata5 sites
- Heterastridium conglobatum5 sites
- Iranothalamia incrustans5 sites
- Oxytoma czekanowskii5 sites
- Rhacophyllites debilis5 sites
- Amblysiphonella4 sites
- Chlamys4 sites
The Paleobiology Database records 211 sites for Monotis, 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
3 references- The Late Triassic bivalve Monotis in accreted terranes of Alaska1
- [Sections of the Trias from the upper River Kolym and northern Priochotya]1
- [Upper Triassic coastal deposits of Tugursky Bay (Western Priochothye)]1
Each of the 3 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. Each entry links to the Paleobiology Database's own record for the work.
Media and terms
Media content1

Picture of Monotis
- Source
- Wikidata/Commons
- Credit
- Momotarou2012
- Licence
- CC BY-SA 3.0
- Commercial use
- the licence allows it
No 3D scan of Monotis was found in Sketchfab.
Smithsonian Open Access and MorphoSource were 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 itMonotidae through timeFormations of the Late TriassicThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Bronn 1830