Mosasaurus missouriensis

Uncredited · 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
- MosasaurusPBDB
- Diet
- carnivorePBDB, for Mosasauridae
- Life habit
- aquaticPBDB, for Mosasauridae
- Motility
- actively mobilePBDB, for Osteichthyes
- Vision
- well-developedPBDB, for Mosasauridae
- Environment
- terrestrialPBDB, for Amniota
Time the record covers
At most 12 million years on record.
Every occurrence read is dated to somewhere between 83.6 Mya and 72.2 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.
6 occurrences of Mosasaurus missouriensis on record, most of them in the Late Cretaceous. 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
6 occurrences- Late Cretaceous100%
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
4 formations
- Pierre Shale Formation · Montana Group3
- Wolfe City Formation · Taylor Group1
- Bearpaw Shale Formation · Montana Group1
- Bearpaw Shale Formation1
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The named rock units Mosasaurus missouriensis has been recovered from, largest first. Drawn where the rock is now, not where it formed.
Mosasaurus missouriensis and its relatives
Late CretaceousWhere Mosasaurus missouriensis and its relatives were recorded in the Late Cretaceous.
Found in the same rock
12 taxa- Baculites compressus1 site
- Cephalopoda1 site
- Elopidae1 site
- Lamniformes1 site
- Nephropidae1 site
- Nichollsemys baieri1 site
- Osteichthyes1 site
- Plioplatecarpus primaevus1 site
- Prognathodon overtoni1 site
- Squalicorax1 site
- Ursichthys longiparietalis1 site
- Xampylodon dentatus1 site
The Paleobiology Database records 6 sites for Mosasaurus missouriensis, and this reads all of them. The number is how many of those sites it was catalogued from too.
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
4 references- The Skull of American Mosasaurs3
- A small, exquisitely preserved specimen of Mosasaurus missouriensis (Squamata, Mosasauridae) from the upper Campanian of the Bearpaw Formation, western Canada, and the first stomach contents for the genus1
- The mosasaur collections of the Museum National d'Histoire Naturelle of Paris1
- Notes on mosasaurs from Texas1
Each of the 6 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 content2

Picture of Mosasaurus missouriensis
- Source
- Wikidata/Commons
- Credit
- nobody named on the record
- Licence
- not stated by the source
- Commercial use
- cannot be read from the licence given — check the record
Laser scan
- Source
- MorphoSource
- Licence
- In Copyright
- Commercial use
- cannot be read from the licence given — check the record
- Specimen
- Mosasaurus missouriensis · ku:kuvp:1034
This is what the site found, which is not the same as what exists.
Keep going
What may have been alongside itMosasaurus through timeFormations of the Late CretaceousThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. (Harlan 1834)