Mosasaurus conodon

Ryan Somma · CC BY 2.0 · 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
- 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 18 million years on record.
Every occurrence read is dated to somewhere between 83.6 Mya and 66 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.
9 occurrences of Mosasaurus conodon 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
9 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
5 formations
- Navesink Formation · Monmouth Group4
- Pierre Shale Formation2
- Severn Formation1
- Bearpaw Shale Formation1
- Bearpaw Shale Formation1
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The named rock units Mosasaurus conodon has been recovered from, largest first. Drawn where the rock is now, not where it formed.
Mosasaurus conodon and its relatives
Late CretaceousWhere Mosasaurus conodon and its relatives were recorded in the Late Cretaceous.
Found in the same rock
89 taxa- Osteopygis emarginatus3 sites
- Peritresius ornatus3 sites
- Archaeolamna kopingensis2 sites
- Cimoliasaurus magnus2 sites
- Hadrosauridae2 sites
- Halisaurus platyspondylus2 sites
- Ischyrhiza mira2 sites
- Mosasauridae2 sites
- Mosasaurus hoffmannii2 sites
- Squalicorax kaupi2 sites
- Squalicorax pristodontus2 sites
- Squatina (Cretascyllium) hassei2 sites
- Anomoeodus1 site
- Anomoeodus latidens1 site
- Batoidea1 site
- Belemnitella americana1 site
- Bernaya (Bernaya) burlingtonensis1 site
- Bivalvia1 site
- Borealosuchus1 site
- Brachyrhizodus wichitaensis1 site
- Callianassa mortoni1 site
- Cantioscyllium decipiens1 site
- Carcharias samhammeri1 site
- Cardium1 site
The Paleobiology Database records 9 sites for Mosasaurus conodon, 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
7 references- Osteology and taxonomy of Mosasaurus conodon Cope 1881 from the Late Cretaceous of North America3
- Vertebrate Paleontology and Stratigraphy of the Late Cretaceous Holmdel Park Site, Monmouth County, New Jersey1
- Recent mosasaur discoveries from New Jersey and Delaware, USA: stratigraphy, taphonomy and implications for mosasaur extinction1
- Pliopletecarpus primaevus (Mosasauridae) from the Bearpaw Formation (Campanian, Upper Cretaceous) of the North American Western Interior Seaway1
- Upper Cretaceous reptiles from the Severn Formation of Maryland1
- Rare marine reptiles from the Cretaceous of New Jersey1
- A new Clidastes from New Jersey1
Each of the 9 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 conodon
- Source
- Wikidata/Commons
- Credit
- Ryan Somma
- Licence
- CC BY 2.0
- 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
- Mosasaurus conodon · SMU:76348
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. (Cope 1881)