Thalattosuchia
Searched as Mesosauria. The Paleobiology Database treats Thalattosuchia as the accepted name.

Nobu Tamura ( http://spinops.blogspot.com ) · CC BY 2.5 · 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
- CrocodylomorphaPBDB
- Diet
- carnivorePBDB
- Life habit
- nektonicPBDB
- Motility
- actively mobilePBDB
- Environment
- marinePBDB
Time the record covers
At least 199 million years on record.
The record covers at least 283.3 Mya to 83.6 Mya. No occurrence read is dated outside 290.1 Mya to 66 Mya.
526 occurrences of Thalattosuchia on record, most of them in the Late Jurassic. The Paleobiology Database records this as a living group, and the chart stops with its fossils rather than at the present. 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
526 occurrences- Permian12%
- Early Jurassic14%
- Middle Jurassic27%
- Late Jurassic40%
- Early Cretaceous8%
- Late Cretaceousunder 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
114 formations
- Irati Formation · Passa Dois Group41
- Oxford Clay Formation · Ancholme Group33
- Kimmeridge Clay Formation · Ancholme Group30
- Posidonia Shale Formation19
- Vaca Muerta Formation16
- El Mers Formation11
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The named rock units Thalattosuchia has been recovered from, largest first. Drawn where the rock is now, not where it formed. 90 further formations hold fewer occurrences each and are not listed. 137 occurrences have no formation on record, which is common for older literature.
Thalattosuchia and its relatives
Late JurassicWhere Thalattosuchia and its relatives were recorded in the Late Jurassic.
Found in the same rock
932 taxa- Steneosaurus46 sites
- Macrospondylus bollensis19 sites
- Metriorhynchidae18 sites
- Machimosaurus hugii17 sites
- Theropoda16 sites
- Ichthyosauria15 sites
- Lepidotes15 sites
- Plesiosauria14 sites
- Machimosaurus13 sites
- Sauropoda13 sites
- Dakosaurus12 sites
- Dakosaurus maximus12 sites
- Pterosauria11 sites
- Pliosauridae10 sites
- Teleosauridae10 sites
- Teleosaurus10 sites
- Hybodus9 sites
- Caturus8 sites
- Geosaurus8 sites
- Goniopholis8 sites
- Metriorhynchus8 sites
- Megalosaurus7 sites
- Osteichthyes7 sites
- Pliosaurus7 sites
The Paleobiology Database records 323 sites for Thalattosuchia, 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
201 references- Die Krokodilier des Deutschen und Englischen Oberen Lias [The crocodiles of the German and English Upper Lias]28
- Revision of the Late Jurassic teleosaurid genus Machimosaurus (Crocodylomorpha, Thalattosuchia)17
- Note sur le Squelette et la Restauration du Teleosaurus cadomensis [Note on the skeleton and restoration of Teleosaurus cadomensis]15
- The mystery of Mystriosaurus: Redescribing the poorly known Early Jurassic teleosauroid thalattosuchians Mystriosaurus laurillardi and Steneosaurus brevior14
- Mémoire sur les dinosauriens et les crocodiliens des terrains jurassiques de Boulogne-sur-Mer [Memoir on the dinosaurs and crocodilians of the Jurassic deposits of Boulogne-sur-mer]12
- A new species of Cricosaurus (Thalattosuchia: Crocodylomorpha) from southern Germany: the first three-dimensionally preserved Cricosaurus skull from the Solnhofen Archipelago11
- Das Mesosaurier-Material in der Bayerischen Staatssammlung für Paläontologie und Historische Geologie: Übersicht und neue Erkenntnisse11
- Kimmeridgian metriorhynchid crocodiles from England11
- Étude paléontologique des vertébrés du Jurassique d'El Mers (Moyen Atlas) [Paleontological study of the Jurassic veretebrates from El Mers (Middle Atlas)]11
- Andrews, 191311
- The cranial osteology and feeding ecology of the metriorhynchid crocodylomorph genera Dakosaurus and Plesiosuchus from the Late Jurassic of Europe10
- A catalogue of teleosauroids (Crocodylomorpha: Thalattosuchia) from the Toarcian and Bajocian (Jurassic) of southern Luxembourg9
Each of the 526 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. 189 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 content1

Picture of Thalattosuchia
- Source
- Wikidata/Commons
- Credit
- Nobu Tamura ( http://spinops.blogspot.com )
- Licence
- CC BY 2.5
- Commercial use
- the licence allows it
No 3D scan of Thalattosuchia 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 itCrocodylomorpha through timeFormations of the Late JurassicThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Giebel 1847