Yochelcionella

Yochelcionella is an extinct genus of basal molluscs which lived during the Tommotian epoch, the first epoch of the Cambrian period. This genus is often reconstructed to resemble snails.

Yochelcionella

Hariadhi · 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
YochelcionellidaePBDB
Diet
grazerPBDB, for Yochelcionellidae
Life habit
low-level epifaunalPBDB, for Yochelcionellidae
Motility
slow-movingPBDB, for Yochelcionellidae
Vision
blindPBDB, for Yochelcionellidae
Environment
marinePBDB, for Helcionelloida

Time the record covers

At least 18 million years on record.

The record covers at least 521 Mya to 503 Mya. No occurrence read is dated outside 538.8 Mya to 497 Mya.

Cambrian — about 69 of 69 occurrencesCambrian540–538 Mya — about 0.0 occurrences538–537 Mya — about 0.0 occurrences537–535 Mya — about 0.0 occurrences535–534 Mya — about 0.0 occurrences534–532 Mya — about 0.0 occurrences532–531 Mya — about 0.0 occurrences531–529 Mya — about 0.0 occurrences529–528 Mya — about 0.0 occurrences528–527 Mya — about 0.0 occurrences527–525 Mya — about 0.1 occurrences525–524 Mya — about 0.4 occurrences524–522 Mya — about 0.4 occurrences522–521 Mya — about 0.7 occurrences521–519 Mya — about 2 occurrences519–518 Mya — about 2 occurrences518–516 Mya — about 2 occurrences516–515 Mya — about 5 occurrences515–514 Mya — about 10 occurrences514–512 Mya — about 10 occurrences512–511 Mya — about 7 occurrences511–509 Mya — about 6 occurrences509–508 Mya — about 3 occurrences508–506 Mya — about 4 occurrences506–505 Mya — about 5 occurrences505–503 Mya — about 4 occurrences503–502 Mya — about 2 occurrences502–501 Mya — about 2 occurrences501–499 Mya — about 0.5 occurrences499–498 Mya — about 0.3 occurrences498–496 Mya — about 0.1 occurrences521 Mya503 Mya539.6 Mya496.2 Mya

69 occurrences of Yochelcionella 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

69 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

28 formations

Henson Gletscher — 82.00°N, 42.00°WHenson Gletscher — 82.50°N, 36.33°WHenson Gletscher — 82.20°N, 30.08°WHenson Gletscher — 82.25°N, 29.75°WHenson Gletscher — 82.15°N, 42.42°WHenson Gletscher — 82.16°N, 42.45°WKuonamka — 70.74°N, 112.98°EKuonamka — 70.75°N, 116.75°EKuonamka — 70.22°N, 113.70°EBystraya — 52.00°N, 119.00°EForteau — 49.60°N, 57.83°WForteau — 49.52°N, 57.71°WAftenstjernesø — 81.50°N, 42.00°WAftenstjernesø — 82.25°N, 37.00°WAftenstjernesø — 81.59°N, 42.23°WCoonigan — 31.31°S, 142.18°EGowers — 19.54°S, 138.90°EKinzers — 39.92°N, 76.85°WShackleton Limestone — 82.22°S, 160.31°EParalleldal — 82.63°N, 32.50°WParalleldal — 82.25°N, 31.33°WXinji — 33.27°N, 112.98°EXinji — 34.90°N, 106.85°EPestrotsvet — 60.70°N, 124.72°EPestrotsvet — 61.13°N, 126.80°EVintage — 39.93°N, 76.85°WPerekhodnaya — 61.09°N, 126.68°ECape Melville — 62.03°S, 57.60°WMurrawong Creek — 31.30°S, 151.10°ESekwi — 63.88°N, 127.75°WLáncara — 42.58°N, 5.42°WAndrarum Limestone — 55.02°N, 14.92°EBastion — 74.10°N, 23.00°WAnse Maranda — 46.83°N, 71.09°WBrowns Pond — 42.22°N, 73.73°WLower Comley — 52.56°N, 2.76°WDengying — 33.00°N, 107.92°E

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The named rock units Yochelcionella has been recovered from, largest first. Drawn where the rock is now, not where it formed. 4 further formations hold fewer occurrences each and are not listed.

Yochelcionella and its relatives

Cambrian

Where Yochelcionella and its relatives were recorded in the Cambrian.

Found in the same rock

338 taxa

The Paleobiology Database records 58 sites for Yochelcionella, 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

30 references

Each of the 69 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. 18 further references are not listed. 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 Yochelcionella

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

No 3D scan of Yochelcionella 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 itYochelcionellidae through timeFormations of the CambrianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Runnegar and Pojeta 1974