Isadia

Isadia is an extinct genus of prehistoric freshwater ray-finned fish from the order Eurynotoidiformes. It is known from the Permian of European Russia. The genus Amblypterina is partially considered a junior synonym of both Isadia and Kichkassia.

No picture of Isadia was found. Wikipedia, Wikidata and iDigBio were searched and had none. Smithsonian Open Access did not answer, so this is what the others held rather than everything there is. GBIF was asked, and what came back is not recorded: nothing, or a picture this site could not tie to Isadia, or no answer at all. This entry cannot say which.

On record

Recorded, not inferred
Sits inside
EurynotoidiidaePBDB
Motility
actively mobilePBDB, for Osteichthyes

Time the record covers

At most 13 million years on record.

Every occurrence read is dated to somewhere between 266.9 Mya and 254.14 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Permian — about 28 of 28 occurrencesPermian267–266 Mya — about 0.1 occurrences266–266 Mya — about 0.1 occurrences266–266 Mya — about 0.1 occurrences266–265 Mya — about 0.1 occurrences265–265 Mya — about 0.1 occurrences265–264 Mya — about 0.5 occurrences264–264 Mya — about 2 occurrences264–263 Mya — about 2 occurrences263–263 Mya — about 2 occurrences263–262 Mya — about 2 occurrences262–262 Mya — about 2 occurrences262–261 Mya — about 2 occurrences261–261 Mya — about 2 occurrences261–261 Mya — about 2 occurrences261–260 Mya — about 2 occurrences260–260 Mya — about 1 occurrence260–259 Mya — about 1 occurrence259–259 Mya — about 1 occurrence259–258 Mya — about 1 occurrence258–258 Mya — about 1 occurrence258–257 Mya — about 1 occurrence257–257 Mya — about 1 occurrence257–256 Mya — about 0.4 occurrences256–256 Mya — about 0.3 occurrences256–255 Mya — about 0.3 occurrences255–255 Mya — about 0.3 occurrences255–255 Mya — about 0.3 occurrences255–254 Mya — about 0.3 occurrences267.4 Mya253.6 Mya

28 occurrences of Isadia on record, most of them in the Permian. 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

28 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

8 formations

Poldarsa — 60.61°N, 45.62°EPoldarsa — 60.58°N, 45.43°EMalokinelskaya — 51.47°N, 55.14°EMalokinelskaya — 53.47°N, 52.14°EMalokinelskaya — 52.86°N, 53.54°EKulchumovskaya — 51.66°N, 55.93°EKulchumovskaya — 51.29°N, 55.66°EKutulukskaya — 53.29°N, 53.01°EKutulukskaya — 53.31°N, 52.31°EKutuluk — 51.34°N, 55.76°EKutuluk — 52.07°N, 54.23°EVyazovskaya — 51.86°N, 56.34°EPoldarsky — 60.40°N, 44.10°ESalarevskaya — 60.97°N, 46.47°E

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The named rock units Isadia 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.

Isadia and its relatives

Permian

Where Isadia and its relatives were recorded in the Permian.

Found in the same rock

257 taxa

The Paleobiology Database records 21 sites for Isadia, 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

6 references

Each of the 28 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 content0

No picture of Isadia was found. Wikipedia, Wikidata and iDigBio were searched and had none.

Smithsonian Open Access did not answer, so this is what the others held rather than everything there is.

GBIF was asked, and what came back is not recorded: nothing, or a picture this site could not tie to Isadia, or no answer at all. This entry cannot say which.

No 3D scan of Isadia was found in MorphoSource and Sketchfab.

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 itEurynotoidiidae through timeFormations of the PermianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Minikh 1986