Bystrowiana

Bystrowiana is an extinct genus of bystrowianid chroniosuchian from upper Permian deposits of Vladimir Region, Russia and Jiyuan, China. Chroniosuchians are often thought to be reptiliomorphs, but some recent phylogenetic analyses suggest instead that they are stem-tetrapods. The genus is named in honour of the Russian paleontologist Alexey Bystrow. It was first described by Vyushkov in 1957 and the type species is Bystrowiana permira. Two species—B. permira and B. sinica—are known.

Bystrowiana

Dmitry Bogdanov · 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
BystrowianinaePBDB
Motility
actively mobilePBDB, for Osteichthyes
Environment
brackish,freshwater,terrestrialPBDB, for Tetrapoda

Time the record covers

At least 8.2 million years on record.

The record covers at least 256.8 Mya to 248.6 Mya. No occurrence read is dated outside 259.857 Mya to 247 Mya.

Permian — about 3 of 4 occurrencesPermianEarly Triassic — about 1 of 4 occurrencesEarly TriassicMiddle Triassic — about 0 of 4 occurrences260–259 Mya — about 0.4 occurrences259–259 Mya — about 0.4 occurrences259–259 Mya — about 0.4 occurrences259–258 Mya — about 0.4 occurrences258–258 Mya — about 0.4 occurrences258–257 Mya — about 0.4 occurrences257–257 Mya — about 0.3 occurrences257–256 Mya — about 0.1 occurrences256–256 Mya — about 0.1 occurrences256–255 Mya — about 0.1 occurrences255–255 Mya — about 0.1 occurrences255–254 Mya — about 0.1 occurrences254–254 Mya — about 0.0 occurrences249–248 Mya — about 0.2 occurrences248–248 Mya — about 0.3 occurrences248–247 Mya — about 0.3 occurrences247–247 Mya — about 0.3 occurrences256.8 Mya248.6 Mya260.4 Mya246.5 Mya

4 occurrences of Bystrowiana 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

4 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

2 formations

Shangshihezi — 34.94°N, 112.40°EPetropavlovskaya — 51.28°N, 55.89°E

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The named rock units Bystrowiana has been recovered from, largest first. Drawn where the rock is now, not where it formed. 2 occurrences have no formation on record, which is common for older literature.

Bystrowiana and its relatives

Permian

Where Bystrowiana and its relatives were recorded in the Permian.

Found in the same rock

47 taxa

The Paleobiology Database records 4 sites for Bystrowiana, 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

4 references

Each of the 4 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 Bystrowiana

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

No 3D scan of Bystrowiana 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 itBystrowianinae through timeFormations of the PermianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Vjuschkov 1957