Angistorhinus

Angistorhinus is an extinct genus of phytosaur known from the Late Triassic period of Texas and Wyoming, United States. It was first named by Mehl in 1913 and the type species is Angistorhinus grandis. Other species from Texas and Wyoming, A. alticephalus, A. gracilis and A. maximus, are cospecific with the type species. Angistorhinus is known from the holotype UC 631, partial skull and lower jaws recovered from the Popo Agie Formation, Chugwater Group, Wyoming and from the associated paratype UM 531, a partial skull, TMM 31098-1, skull and lower jaws and ROM 7977, partial skull and lower jaws, recovered from the 'Pre-Tecovas Horizon' in the Dockum Group, Texas. A possible second species, A. talainti is known from the Triassic of Morocco. In 1995, Long and Murry created the new combination, Angistorhinus megalodon by synonymy for Brachysuchus. Hungerbühler and Sues (2001) hypothesised that Angistorhinus is a junior synonym of Rutiodon. However, in 2010 Michelle R. Stocker retained the validity of Brachysuchus and of A. grandis.

Angistorhinus

HoopoeBaijiKite · Public Domain · 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
MystriosuchinaePBDB
Diet
carnivorePBDB
Motility
actively mobilePBDB, for Osteichthyes
Environment
terrestrialPBDB, for Diapsida

Time the record covers

At most 32 million years on record.

Every occurrence read is dated to somewhere between 237 Mya and 205.7 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Middle Triassic — about 0 of 12 occurrencesLate Triassic — about 12 of 12 occurrencesLate Triassic238–237 Mya — about 0.4 occurrences237–235 Mya — about 1.0 occurrences235–234 Mya — about 1.0 occurrences234–233 Mya — about 1.0 occurrences233–232 Mya — about 1.0 occurrences232–231 Mya — about 1.0 occurrences231–230 Mya — about 1.0 occurrences230–229 Mya — about 1.0 occurrences229–228 Mya — about 1.0 occurrences228–227 Mya — about 0.6 occurrences227–226 Mya — about 0.2 occurrences226–225 Mya — about 0.2 occurrences225–224 Mya — about 0.2 occurrences224–222 Mya — about 0.2 occurrences222–221 Mya — about 0.2 occurrences221–220 Mya — about 0.2 occurrences220–219 Mya — about 0.2 occurrences219–218 Mya — about 0.2 occurrences218–217 Mya — about 0.2 occurrences217–216 Mya — about 0.2 occurrences216–215 Mya — about 0.2 occurrences215–214 Mya — about 0.2 occurrences214–213 Mya — about 0.2 occurrences213–212 Mya — about 0.2 occurrences212–210 Mya — about 0.2 occurrences210–209 Mya — about 0.2 occurrences209–208 Mya — about 0.2 occurrences208–207 Mya — about 0.2 occurrences207–206 Mya — about 0.2 occurrences206–205 Mya — about 0.1 occurrences237.6 Mya205.1 Mya

12 occurrences of Angistorhinus on record, most of them in the Late Triassic. 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

12 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

5 formations

Popo Agie — 43.10°N, 109.15°WPopo Agie — 42.70°N, 108.67°WPopo Agie — 42.80°N, 108.82°WPopo Agie — 43.17°N, 109.18°WColorado City — 32.17°N, 101.25°WColorado City — 32.00°N, 101.17°WChinle — 35.87°N, 111.35°WSanta Rosa — 35.47°N, 105.85°WTimezgadiouine — 31.20°N, 9.00°W

Loading coastlines…

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

Angistorhinus and its relatives

Late Triassic

Where Angistorhinus and its relatives were recorded in the Late Triassic.

Found in the same rock

6 taxa

The Paleobiology Database records 10 sites for Angistorhinus, 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

9 references

Each of the 12 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 Angistorhinus

Credit
HoopoeBaijiKite
Licence
Public Domain
Commercial use
the licence allows it

No 3D scan of Angistorhinus 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.

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 itMystriosuchinae through timeFormations of the Late TriassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Mehl 1913