Alexenia

No picture of Alexenia 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 Alexenia, or no answer at all. This entry cannot say which.

On record

Recorded, not inferred
Sits inside
SpyridiophoriniPBDB
Diet
suspension feederPBDB, for Productidina
Life habit
low-level epifaunalPBDB, for Productidina
Motility
stationaryPBDB, for Productidina
Vision
blindPBDB, for Strophomenata
Environment
marinePBDB, for Lophophorata

Time the record covers

At least 32 million years on record.

The record covers at least 298.9 Mya to 266.9 Mya. No occurrence read is dated outside 303.7 Mya to 264.28 Mya.

Carboniferous — about 2 of 34 occurrencesCarboniferousPermian — about 32 of 34 occurrencesPermian304–303 Mya — about 0.2 occurrences303–302 Mya — about 0.6 occurrences302–300 Mya — about 0.6 occurrences300–299 Mya — about 0.6 occurrences299–298 Mya — about 1.0 occurrences298–296 Mya — about 1 occurrence296–295 Mya — about 1 occurrence295–294 Mya — about 1 occurrence294–292 Mya — about 1 occurrence292–291 Mya — about 1 occurrence291–289 Mya — about 0.8 occurrences289–288 Mya — about 0.4 occurrences288–287 Mya — about 0.4 occurrences287–285 Mya — about 0.5 occurrences285–284 Mya — about 0.6 occurrences284–283 Mya — about 2 occurrences283–281 Mya — about 3 occurrences281–280 Mya — about 3 occurrences280–279 Mya — about 3 occurrences279–277 Mya — about 3 occurrences277–276 Mya — about 3 occurrences276–274 Mya — about 3 occurrences274–273 Mya — about 0.2 occurrences273–272 Mya — about 0.1 occurrences272–270 Mya — about 0.1 occurrences270–269 Mya — about 0.1 occurrences269–268 Mya — about 0.1 occurrences268–266 Mya — about 0.9 occurrences266–265 Mya — about 2 occurrences265–263 Mya — about 0.7 occurrences298.9 Mya266.9 Mya304.5 Mya263.5 Mya

34 occurrences of Alexenia 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

34 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

Coyote Butte — 43.95°N, 119.76°WCoyote Butte — 43.92°N, 119.88°WCoyote Butte — 44.06°N, 119.68°WCoyote Butte — 43.94°N, 119.79°WCoyote Butte — 44.00°N, 119.73°WLongyin — 26.04°N, 105.01°ELongyin — 24.70°N, 105.22°EMaping — 24.70°N, 105.22°EShazitang — 26.04°N, 105.01°EBayinhe — 35.10°N, 98.80°EBaomoshan — 26.04°N, 105.01°EShaksgam — 35.89°N, 76.75°EZweikofel — 46.56°N, 13.23°E

Loading coastlines…

The named rock units Alexenia has been recovered from, largest first. Drawn where the rock is now, not where it formed. 3 occurrences have no formation on record, which is common for older literature.

Alexenia and its relatives

Permian

Where Alexenia and its relatives were recorded in the Permian.

Found in the same rock

317 taxa

The Paleobiology Database records 33 sites for Alexenia, 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

7 references

Each of the 34 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 the Paleobiology Database's own record for the work.

Media and terms

Media content1

3D model

Source
Sketchfab
Licence
CC Attribution-NonCommercial-ShareAlike
Commercial use
the licence does not allow it

No picture of Alexenia 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 Alexenia, or no answer at all. This entry cannot say which.

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 itSpyridiophorini through timeFormations of the PermianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0.