Semionotus

Semionotus is an extinct genus of ray-finned fish found throughout Northern Pangaea during the late Triassic, becoming extinct in the Early Jurassic.

Semionotus

Ghedoghedo · CC BY-SA 3.0 · 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
SemionotidaePBDB
Diet
durophage, carnivorePBDB, for Semionotiformes
Life habit
nektonicPBDB, for Semionotiformes
Motility
actively mobilePBDB, for Semionotiformes

Time the record covers

At least 111 million years on record.

The record covers at least 248.6 Mya to 137.05 Mya. No occurrence read is dated outside 250.8 Mya to 132.6 Mya.

Permian — about 0 of 67 occurrencesEarly Triassic — about 2 of 67 occurrencesMiddle Triassic — about 9 of 67 occurrencesLate Triassic — about 29 of 67 occurrencesLate TriassicEarly Jurassic — about 26 of 67 occurrencesEarly JurassicMiddle Jurassic — about 0 of 67 occurrencesLate Jurassic — about 0 of 67 occurrencesEarly Cretaceous — about 1 of 67 occurrencesEarly Cretaceous253–249 Mya — about 0.8 occurrences249–245 Mya — about 2 occurrences245–241 Mya — about 2 occurrences241–237 Mya — about 6 occurrences237–233 Mya — about 0.4 occurrences233–229 Mya — about 0.9 occurrences229–224 Mya — about 3 occurrences224–220 Mya — about 4 occurrences220–216 Mya — about 4 occurrences216–212 Mya — about 4 occurrences212–208 Mya — about 4 occurrences208–204 Mya — about 4 occurrences204–200 Mya — about 14 occurrences200–196 Mya — about 9 occurrences196–192 Mya — about 5 occurrences192–188 Mya — about 0.5 occurrences188–184 Mya — about 0.4 occurrences138–134 Mya — about 0.6 occurrences134–130 Mya — about 0.4 occurrences248.6 Mya137.05 Mya253 Mya130 Mya

67 occurrences of Semionotus 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

67 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

25 formations

Boonton — 40.90°N, 74.40°WChinle — 35.84°N, 111.25°WChinle — 36.09°N, 111.36°WChinle — 35.65°N, 111.12°WChinle — 38.13°N, 109.18°WChinle — 38.17°N, 109.23°WChinle — 38.28°N, 108.90°WLockatong — 40.77°N, 74.02°WLockatong — 40.20°N, 75.27°WMuschelkalk — 41.27°N, 1.12°ETowaco — 41.02°N, 74.26°WTowaco — 40.82°N, 74.33°WEast Berlin — 41.34°N, 72.77°WEast Berlin — 41.45°N, 72.74°WEast Berlin — 41.60°N, 72.71°WRedonda — 35.00°N, 103.67°WAshfield Shale — 33.91°S, 151.19°ETerrigal — 33.43°S, 151.34°ELöwenstein — 49.03°N, 8.97°EStockton — 40.86°N, 73.96°WStockton — 40.33°N, 74.65°WMoenave — 37.10°N, 113.54°WBull Run — 38.83°N, 77.70°WShuttle Meadow — 41.42°N, 72.72°WShuttle Meadow — 41.40°N, 72.77°WPortland — 41.50°N, 72.70°WPortland — 42.21°N, 72.60°WMoon-Airel — 49.22°N, 1.08°EMcCoy Brook — 45.40°N, 64.22°WTrujillo — 34.96°N, 101.70°WLithofacies Association II — 35.87°N, 78.90°WCow Branch — 36.54°N, 79.67°WCedar Mountain — 38.83°N, 109.57°WArden Sandstone — 52.30°N, 1.69°WClarens — 28.86°S, 27.88°EMidland — 38.62°N, 77.74°W

Loading coastlines…

The named rock units Semionotus has been recovered from, largest first. Drawn where the rock is now, not where it formed. One further formation holds fewer occurrences and is not listed. 3 occurrences have no formation on record, which is common for older literature.

Semionotus and its relatives

Late Triassic

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

Found in the same rock

287 taxa

The Paleobiology Database records 52 sites for Semionotus, 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

30 references

Each of the 67 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. 18 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 Semionotus

Credit
Ghedoghedo
Licence
CC BY-SA 3.0
Commercial use
the licence allows it

No 3D scan of Semionotus 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 itSemionotidae through timeFormations of the Late TriassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Agassiz 1832