Tuarangisaurus
Tuarangisaurus is an extinct genus of elasmosaurid known from New Zealand and Argentina. The type and only known species is Tuarangisaurus keyesi, named by "Pont" Wiffen, Joan Wiffen and Bill Moisley in 1986. The specific name honours Ian W. Keyes of the New Zealand Geological Survey.

FunkMonk · CC BY 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
- WeddellonectiaPBDB
- Diet
- carnivorePBDB, for Plesiosauria
- Life habit
- aquatic, depth=surfacePBDB, for Plesiosauria
- Motility
- actively mobilePBDB, for Plesiosauria
- Environment
- marinePBDB, for Plesiosauria
- Length
- 8 mWikidata
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.
7 occurrences of Tuarangisaurus 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
7 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
- Tahora Formation · Mata Group4
- Mocuio Formation1
- Conway Formation1
- Lefipán Formation1
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The named rock units Tuarangisaurus has been recovered from, largest first. Drawn where the rock is now, not where it formed.
Tuarangisaurus and its relatives
Late CretaceousWhere Tuarangisaurus and its relatives were recorded in the Late Cretaceous.
Found in the same rock
41 taxa- Elasmosauridae4 sites
- Dinosauria2 sites
- Pterodactyloidea2 sites
- Pterosauria2 sites
- Australopristis wiffeni1 site
- Calcarichelys1 site
- Carinodens belgicus1 site
- Ceratosauria1 site
- Chondrichthyes1 site
- Dryosauridae1 site
- Elasmobranchii1 site
- Epapatelo otyikokolo1 site
- Euclastes1 site
- Gigantocapulus problematicus1 site
- Globidens phosphaticus1 site
- Hadrosauroidea1 site
- Halisaurus1 site
- Homolodromia novaezelandica1 site
- Isselicrinus mangahouangaensis1 site
- Mollusca1 site
- Mosasauridae1 site
- Nodosauridae1 site
- Osteichthyes1 site
- Ostrea1 site
The Paleobiology Database records 6 sites for Tuarangisaurus, 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
5 references- Late Cretaceous reptiles (families Elasmosauridae and Pliosauridae) from the Mangahouanga Stream, North Island, New Zealand3
- The first record of Tuarangisaurus (Sauropterygia, Plesiosauria) from the Maastrichtian of the Lefipán Formation, Chubut, Argentina1
- A juvenile Tuarangisaurus keyesi Wiffen and Moisley 1986 (Plesiosauria, Elasmosauridae) from the Upper Cretaceous of New Zealand, with remarks on its skull ontogeny1
- A reappraisal of the Late Cretaceous Weddellian plesiosaur genus Mauisaurus Hector, 18741
- Cretaceous amniotes from Angola: dinosaurs, pterosaurs, mosasaurs, plesiosaurs, turtles1
Each of the 7 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 content1

Picture of Tuarangisaurus
- Source
- Wikidata/Commons
- Credit
- FunkMonk
- Licence
- CC BY 3.0
- Commercial use
- the licence allows it
No 3D scan of Tuarangisaurus was found in MorphoSource and Sketchfab.
Smithsonian Open Access was 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 itWeddellonectia through timeFormations of the Late CretaceousThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Wiffen and Moisley 1986