Mosasaurinae
The Mosasaurinae are a subfamily of mosasaurs, a diverse group of Late Cretaceous marine squamates. Members of the subfamily are informally and collectively known as "mosasaurines" and their fossils have been recovered from every continent.

Uncredited · via Wikipedia/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
- MosasauridaePBDB
- 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 least 21 million years on record.
The record covers at least 93.9 Mya to 72.2 Mya. No occurrence read is dated outside 143.1 Mya to 61.66 Mya.
393 occurrences of Mosasaurinae 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
393 occurrences- Early Cretaceousunder 1%
- Late Cretaceous99%
- Paleoceneunder 1%
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
105 formations
- Pierre Shale Formation · Montana Group16
- Navesink Formation · Monmouth Group13
- Gramame Formation10
- Moreno Formation · Great Valley Group9
- Severn Formation9
- Couche III Formation9
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The named rock units Mosasaurinae has been recovered from, largest first. Drawn where the rock is now, not where it formed. 81 further formations hold fewer occurrences each and are not listed. 112 occurrences have no formation on record, which is common for older literature.
Mosasaurinae and its relatives
Late CretaceousWhere Mosasaurinae and its relatives were recorded in the Late Cretaceous.
Found in the same rock
1,538 taxa- Prognathodon41 sites
- Mosasaurus hoffmannii37 sites
- Squalicorax pristodontus36 sites
- Mosasaurus35 sites
- Elasmosauridae31 sites
- Mosasauridae27 sites
- Squalicorax kaupi22 sites
- Cretalamna appendiculata21 sites
- Chelonioidea16 sites
- Plesiosauria16 sites
- Plioplatecarpinae16 sites
- Hadrosauridae15 sites
- Stephanodus15 sites
- Teleostei15 sites
- Clidastes14 sites
- Clidastes propython14 sites
- Rhinobatos14 sites
- Enchodus elegans13 sites
- Ischyrhiza mira13 sites
- Leiodon anceps13 sites
- Stratodus apicalis12 sites
- Cretalamna maroccana11 sites
- Enchodus11 sites
- Globidens11 sites
The Paleobiology Database records 263 sites for Mosasaurinae, and this reads 240 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
173 references- The marine vertebrate faunas from the Late Cretaceous phosphates of Syria23
- The mosasaur collections of the Museum National d'Histoire Naturelle of Paris19
- The Skull of American Mosasaurs13
- Marine vertebrate faunas from the Maastrichtian phosphates of Benguérir (Ganntour Basin, Morocco): Biostratigraphy, palaeobiogeography and palaeoecology11
- A ocorrência de lagartos marinhos (Mosasauridae - Lepidosauria) e sua associação faunística no cretáceo da Bacia Pernambuco Paraíba, nordeste do Brasil11
- Durophagous Mosasauridae (Squamata) from the Upper Cretaceous phosphates of Morocco, with description of a new species of Globidens10
- Latest Cretaceous mosasaurs and lamniform sharks from Labirinta cave, Vratsa district (northwest Bulgaria): a preliminary note7
- The vertebrate fauna of the Selma Formation of Alabamam: Part VII The Mosasaurs7
- Mosasaur remains from the Upper Cretaceous Izumi Group of southwest Japan6
- Campanian and Maastrichtian mosasaurid reptiles from central Poland6
- New mosasaurs (Reptilia; Family Mosasauridae) from the Upper Cretaceous of North Island, New Zealand6
- Upper Cretaceous reptiles from the Severn Formation of Maryland6
Each of the 393 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. 161 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 content2
Picture of Mosasaurinae
- Source
- Wikipedia/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
3D model
- Source
- Sketchfab
- Licence
- CC Attribution-NonCommercial-ShareAlike
- Commercial use
- the licence does not allow it
Smithsonian Open Access and MorphoSource were not reached for this taxon, so this list is what the others held rather than everything there is.
The description on this site
- Licence
- CC BY-SA 4.0
This is what the site found, which is not the same as what exists.
Keep going
What may have been alongside itMosasauridae through timeFormations of the Late CretaceousThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Gervais 1853