Parasemionotidae

Parasemionotiformes is an extinct order of neopterygian ray-finned fish that existed globally during the Triassic period. It comprises the families Parasemionotidae and Promecosominidae. Many of the included genera are monotypic and most species lived during the Early Triassic epoch.

Parasemionotidae

Bloopityboop · CC BY-SA 4.0 · 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
ParasemionotiformesPBDB
Diet
grazer, detritivorePBDB
Motility
actively mobilePBDB, for Osteichthyes

Time the record covers

At least 14 million years on record.

The record covers at least 251.1 Mya to 237 Mya. No occurrence read is dated outside 251.902 Mya to 233.6 Mya.

Permian — about 0 of 51 occurrencesEarly Triassic — about 46 of 51 occurrencesEarly TriassicMiddle Triassic — about 4 of 51 occurrencesMiddle TriassicLate Triassic — about 1 of 51 occurrencesLate Triassic252–252 Mya — about 0.6 occurrences252–251 Mya — about 3 occurrences251–250 Mya — about 32 occurrences250–250 Mya — about 4 occurrences250–249 Mya — about 4 occurrences249–249 Mya — about 3 occurrences249–248 Mya — about 0.3 occurrences248–247 Mya — about 0.3 occurrences247–247 Mya — about 0.1 occurrences241–241 Mya — about 0.3 occurrences241–240 Mya — about 0.3 occurrences240–240 Mya — about 0.3 occurrences240–239 Mya — about 0.8 occurrences239–238 Mya — about 0.8 occurrences238–238 Mya — about 0.8 occurrences238–237 Mya — about 0.8 occurrences237–236 Mya — about 0.2 occurrences236–236 Mya — about 0.2 occurrences236–235 Mya — about 0.2 occurrences235–234 Mya — about 0.2 occurrences234–234 Mya — about 0.2 occurrences234–233 Mya — about 0.0 occurrences251.1 Mya237 Mya252.4 Mya233.1 Mya

51 occurrences of Parasemionotidae on record, most of them in the Early 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

51 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

14 formations

Middle Sakamena — 13.05°S, 48.87°EMiddle Sakamena — 13.51°S, 49.07°EMiddle Sakamena — 21.71°S, 45.18°EQinglong — 32.06°N, 119.34°EMuschelkalk — 41.27°N, 1.12°EHelongshan — 31.62°N, 117.82°ESulphur Mountain — 54.53°N, 120.74°WWordie Creek — 72.06°N, 23.87°WReingrabener Schiefer — 47.88°N, 15.07°ESpray River — 51.22°N, 115.80°WLipovskaya — 49.26°N, 43.67°EMontney — 54.63°N, 119.94°WMikin — 32.01°N, 78.08°ECandelaria — 38.13°N, 118.03°WDaye — 26.61°N, 107.26°ESulphur Mountain Formation — 54.57°N, 120.78°W

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The named rock units Parasemionotidae has been recovered from, largest first. Drawn where the rock is now, not where it formed. 22 occurrences have no formation on record, which is common for older literature.

Parasemionotidae and its relatives

Early Triassic

Where Parasemionotidae and its relatives were recorded in the Early Triassic.

Found in the same rock

196 taxa

The Paleobiology Database records 24 sites for Parasemionotidae, 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

23 references

Each of the 51 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. 11 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 content2

Picture of Parasemionotidae

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

CT scan

Licence
not stated by the source
Commercial use
cannot be read from the licence given — check the record
Specimen
Parasemionotidae indet. · NHMD:VP:74424A

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 itParasemionotiformes through timeFormations of the Early TriassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Stensiö 1932