Alexarasniidae

Alexarasniidae

Andrej V Gorochov · CC BY 3.0 · via Wikidata/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
AlexarasnioideaPBDB
Motility
actively mobilePBDB, for Arthropoda
Environment
terrestrialPBDB, for Insecta

Time the record covers

At least 12 million years on record.

The record covers at least 254.14 Mya to 241.464 Mya. No occurrence read is dated outside 259.857 Mya to 237 Mya.

Permian — about 3 of 10 occurrencesPermianEarly Triassic — about 1 of 10 occurrencesEarly TriassicMiddle Triassic — about 6 of 10 occurrencesMiddle TriassicLate Triassic — about 0 of 10 occurrences260–260 Mya — about 0.2 occurrences260–259 Mya — about 0.4 occurrences259–258 Mya — about 0.4 occurrences258–257 Mya — about 0.4 occurrences257–256 Mya — about 0.4 occurrences256–256 Mya — about 0.4 occurrences256–255 Mya — about 0.4 occurrences255–254 Mya — about 0.3 occurrences252–252 Mya — about 0.4 occurrences252–251 Mya — about 0.6 occurrences248–247 Mya — about 0.1 occurrences247–246 Mya — about 0.4 occurrences246–245 Mya — about 0.4 occurrences245–244 Mya — about 0.0 occurrences242–241 Mya — about 0.2 occurrences241–240 Mya — about 0.9 occurrences240–240 Mya — about 0.9 occurrences240–239 Mya — about 0.9 occurrences239–238 Mya — about 0.9 occurrences238–237 Mya — about 0.9 occurrences237–237 Mya — about 0.3 occurrences254.14 Mya241.464 Mya260.4 Mya236.5 Mya

10 occurrences of Alexarasniidae 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

10 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

4 formations

Madygen — 40.05°N, 70.21°EPoldarsa — 60.61°N, 45.62°EGrès à Voltzia — 48.71°N, 7.36°EMaltsevo — 54.40°N, 87.54°E

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The named rock units Alexarasniidae has been recovered from, largest first. Drawn where the rock is now, not where it formed.

Alexarasniidae and its relatives

Middle Triassic

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

Found in the same rock

553 taxa

The Paleobiology Database records 6 sites for Alexarasniidae, 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 10 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. Each entry links to doi.org. Relayed as the Paleobiology Database holds them, not checked against what they resolve to.

Media and terms

Media content1

Picture of Alexarasniidae

Credit
Andrej V Gorochov
Licence
CC BY 3.0
Commercial use
the licence allows it

No 3D scan of Alexarasniidae 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.

This is what the site found, which is not the same as what exists.

Keep going

What may have been alongside itAlexarasnioidea through timeFormations of the Middle TriassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Gorochov 2011