Yohoia

Yohoia is an extinct genus of fossil megacheiran arthropod from the Cambrian period. The type species, Yohoia tenuis, has been found in the Burgess Shale formation of British Columbia. 711 specimens of Yohoia are known from the Greater Phyllopod bed, where they comprise 1.35% of the community. In 2015, Conway Morris et al. reported another species, Y. utahana, from the Marjum Formation, Utah.

Yohoia

Junnn11 · CC BY-SA 4.0 · 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
YohoiidaePBDB
Diet
carnivorePBDB
Life habit
nektobenthicPBDB
Motility
actively mobilePBDB

Time the record covers

At most 4.4 million years on record.

Every occurrence read is dated to somewhere between 509.7 Mya and 505.3 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Cambrian — about 25 of 25 occurrencesCambrian510–510 Mya — about 0.2 occurrences510–509 Mya — about 1 occurrence509–509 Mya — about 1 occurrence509–509 Mya — about 1 occurrence509–509 Mya — about 1 occurrence509–509 Mya — about 1 occurrence509–509 Mya — about 1 occurrence509–508 Mya — about 1 occurrence508–508 Mya — about 1 occurrence508–508 Mya — about 1 occurrence508–508 Mya — about 1 occurrence508–508 Mya — about 1 occurrence508–508 Mya — about 1 occurrence508–507 Mya — about 1 occurrence507–507 Mya — about 1 occurrence507–507 Mya — about 1 occurrence507–507 Mya — about 1 occurrence507–507 Mya — about 1 occurrence507–506 Mya — about 1 occurrence506–506 Mya — about 1 occurrence506–506 Mya — about 1 occurrence506–506 Mya — about 1 occurrence506–506 Mya — about 1 occurrence506–506 Mya — about 1 occurrence506–505 Mya — about 1 occurrence505–505 Mya — about 0.2 occurrences510.2 Mya504.8 Mya

25 occurrences of Yohoia 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

25 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

1 formation

Burgess Shale — 51.44°N, 116.47°WBurgess Shale — 51.38°N, 116.43°W

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

Yohoia and its relatives

Cambrian

Where Yohoia and its relatives were recorded in the Cambrian.

Found in the same rock

137 taxa

The Paleobiology Database records 24 sites for Yohoia, 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

2 references

Each of the 25 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 Yohoia

Credit
Junnn11
Licence
CC BY-SA 4.0
Commercial use
the licence allows it

No 3D scan of Yohoia 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 itYohoiidae through timeFormations of the CambrianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0.