Perleidus

Perleidus is an extinct genus of ray-finned fish from the Triassic period. Fossils have been found in the Middle Triassic of Italy, Switzerland, and China. The inclusion of Early Triassic species in the genus Perleidus was questioned.

Perleidus

C. Lombardo. 2001 · 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
PerleididaePBDB
Diet
grazer, detritivorePBDB, for Perleididae
Motility
actively mobilePBDB, for Osteichthyes

Time the record covers

At least 35 million years on record.

The record covers at least 250.8 Mya to 215.38 Mya. No occurrence read is dated outside 251.1 Mya to 211.18 Mya.

Early Triassic — about 4 of 21 occurrencesEarly TriassicMiddle Triassic — about 15 of 21 occurrencesMiddle TriassicLate Triassic — about 2 of 21 occurrencesLate Triassic252–251 Mya — about 2 occurrences251–249 Mya — about 1.0 occurrences249–248 Mya — about 0.6 occurrences248–246 Mya — about 0.2 occurrences245–244 Mya — about 0.8 occurrences244–242 Mya — about 0.2 occurrences242–241 Mya — about 0.7 occurrences241–239 Mya — about 2 occurrences239–238 Mya — about 7 occurrences238–237 Mya — about 5 occurrences237–235 Mya — about 0.1 occurrences235–234 Mya — about 0.1 occurrences234–233 Mya — about 0.1 occurrences233–231 Mya — about 0.1 occurrences231–230 Mya — about 0.1 occurrences230–228 Mya — about 0.1 occurrences228–227 Mya — about 0.1 occurrences216–215 Mya — about 0.2 occurrences215–213 Mya — about 0.3 occurrences213–212 Mya — about 0.3 occurrences212–210 Mya — about 0.1 occurrences250.8 Mya215.38 Mya251.9 Mya210.4 Mya

21 occurrences of Perleidus on record, most of them in the Middle 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

21 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

9 formations

Perledo-Varenna — 46.02°N, 9.30°EMeride — 45.89°N, 8.95°ESulphur Mountain — 54.53°N, 120.74°WTimezgadiouine — 31.07°N, 8.93°WGuanling — 24.78°N, 104.33°ETarasci — 37.40°N, 31.85°EMeride — 45.88°N, 8.90°EHongyanjing — 41.95°N, 96.53°EMuschelkalk — 41.26°N, 1.14°E

Loading coastlines…

The named rock units Perleidus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 7 occurrences have no formation on record, which is common for older literature.

Perleidus and its relatives

Middle Triassic

Where Perleidus and its relatives were recorded in the Middle Triassic.

Found in the same rock

139 taxa

The Paleobiology Database records 20 sites for Perleidus, 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

14 references

Each of the 21 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. 2 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 Perleidus

Credit
C. Lombardo. 2001
Licence
CC BY-SA 4.0
Commercial use
the licence allows it

CT scan

Licence
In Copyright
Commercial use
cannot be read from the licence given — check the record
Specimen
Perleidus sp. · nhmuk:pal:PV P 26456

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 itPerleididae through timeFormations of the Middle TriassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. de Alessandri 1910