Pantosaurus striatus

Pantosaurus is an extinct genus of plesiosaur from the Late Jurassic (Oxfordian) of what is now Wyoming. It lived in what used to be the Sundance Sea. It was originally named Parasaurus by Othniel Charles Marsh in reference to Plesiosaurus, but that name was preoccupied, and Marsh changed it. The species Muraenosaurus reedii is in fact a junior synonym of Pantosaurus. The holotype YPM 543 is a partial articulated skeleton, partially prepared to yield a distal humerus, four articulated carpals, a fragment of the coracoid, and several isolated cervical vertebrae from the Upper Member of the Sundance Formation. Other material includes USNM 536963, USNM 536965, UW 3, UW 5544 and UW 15938.

Pantosaurus striatus

Connor Ashbridge · CC BY-SA 4.0 · 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
PantosaurusPBDB
Diet
carnivorePBDB, for Plesiosauria
Life habit
aquatic, depth=surfacePBDB, for Plesiosauria
Motility
actively mobilePBDB, for Plesiosauria
Environment
marinePBDB, for Plesiosauria

Time the record covers

At most 6.7 million years on record.

Every occurrence read is dated to somewhere between 161.5 Mya and 154.8 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Middle Jurassic — about 0 of 6 occurrencesLate Jurassic — about 6 of 6 occurrencesLate Jurassic162–161 Mya — about 0.0 occurrences161–161 Mya — about 0.3 occurrences161–161 Mya — about 0.3 occurrences161–161 Mya — about 0.3 occurrences161–160 Mya — about 0.3 occurrences160–160 Mya — about 0.3 occurrences160–160 Mya — about 0.3 occurrences160–160 Mya — about 0.3 occurrences160–159 Mya — about 0.3 occurrences159–159 Mya — about 0.3 occurrences159–159 Mya — about 0.3 occurrences159–159 Mya — about 0.2 occurrences159–158 Mya — about 0.2 occurrences158–158 Mya — about 0.2 occurrences158–158 Mya — about 0.2 occurrences158–158 Mya — about 0.2 occurrences158–157 Mya — about 0.2 occurrences157–157 Mya — about 0.2 occurrences157–157 Mya — about 0.2 occurrences157–157 Mya — about 0.2 occurrences157–156 Mya — about 0.2 occurrences156–156 Mya — about 0.2 occurrences156–156 Mya — about 0.2 occurrences156–156 Mya — about 0.2 occurrences156–155 Mya — about 0.2 occurrences155–155 Mya — about 0.2 occurrences155–155 Mya — about 0.2 occurrences155–155 Mya — about 0.0 occurrences162 Mya154.3 Mya

6 occurrences of Pantosaurus striatus on record, most of them in the Late Jurassic. 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

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

1 formation

Sundance — 44.57°N, 108.05°WSundance — 44.60°N, 107.76°WSundance — 43.41°N, 106.75°WSundance — 44.84°N, 111.73°WSundance — 43.55°N, 107.77°W

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The named rock units Pantosaurus striatus has been recovered from, largest first. Drawn where the rock is now, not where it formed.

Pantosaurus striatus and its relatives

Late Jurassic

Where Pantosaurus striatus and its relatives were recorded in the Late Jurassic.

Found in the same rock

5 taxa

The Paleobiology Database records 5 sites for Pantosaurus striatus, 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

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 Pantosaurus striatus

Credit
Connor Ashbridge
Licence
CC BY-SA 4.0
Commercial use
the licence allows it

3D model

Source
Sketchfab
Licence
CC Attribution-NonCommercial
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 itPantosaurus through timeFormations of the Late JurassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Marsh 1891)