Xenusia

Lobopodians are members of the informal group Lobopodia, or the formally erected phylum Lobopoda Cavalier-Smith (1998). They are panarthropods with stubby legs called lobopods, a term which may also be used as a common name of this group as well. While the definition of lobopodians may differ between literatures, it usually refers to a group of soft-bodied, marine worm-like fossil panarthropods such as Aysheaia and Hallucigenia. However, other genera like Kerygmachela and Pambdelurion are often referred to as "gilled lobopodians".

Xenusia

Uncredited · 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
PanarthropodaPBDB

Time the record covers

At least 1.5 million years on record.

The record covers at least 516 Mya to 514.5 Mya. No occurrence read is dated outside 521 Mya to 506.5 Mya.

Cambrian — about 11 of 11 occurrencesCambrian522–521 Mya — about 0.0 occurrences521–520 Mya — about 0.8 occurrences520–520 Mya — about 0.8 occurrences520–519 Mya — about 0.8 occurrences519–519 Mya — about 0.8 occurrences519–518 Mya — about 0.8 occurrences518–518 Mya — about 0.8 occurrences518–517 Mya — about 0.8 occurrences517–517 Mya — about 0.8 occurrences517–516 Mya — about 0.8 occurrences516–516 Mya — about 0.7 occurrences516–515 Mya — about 0.6 occurrences515–515 Mya — about 0.6 occurrences515–514 Mya — about 0.4 occurrences514–514 Mya — about 0.2 occurrences514–513 Mya — about 0.2 occurrences513–513 Mya — about 0.2 occurrences513–512 Mya — about 0.2 occurrences512–512 Mya — about 0.1 occurrences512–511 Mya — about 0.1 occurrences511–511 Mya — about 0.1 occurrences511–510 Mya — about 0.1 occurrences510–510 Mya — about 0.1 occurrences510–509 Mya — about 0.1 occurrences509–509 Mya — about 0.1 occurrences509–508 Mya — about 0.1 occurrences508–508 Mya — about 0.1 occurrences508–507 Mya — about 0.1 occurrences507–507 Mya — about 0.1 occurrences507–506 Mya — about 0.0 occurrences516 Mya – 514.5 Mya521.5 Mya506 Mya

11 occurrences of Xenusia on record, most of them in the Cambrian. 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

11 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

Yu'anshan — 24.77°N, 102.58°EYuanshan — 24.84°N, 102.41°EYuanshan — 24.80°N, 102.58°ESinsk — 61.08°N, 126.58°EBalang — 28.42°N, 109.42°E

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

Xenusia and its relatives

Cambrian

Where Xenusia and its relatives were recorded in the Cambrian.

Found in the same rock

326 taxa

The Paleobiology Database records 9 sites for Xenusia, 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 11 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 Xenusia

Credit
nobody named on the record
Licence
not stated by the source
Commercial use
cannot be read from the licence given — check the record

No 3D scan of Xenusia 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 itPanarthropoda through timeFormations of the CambrianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Dzik and Krumbiegel 1989