Helcionella

Helcionella is a genus of helcionellid, a fossil marine invertebrate animal that is considered to be a mollusk and may possibly be a gastropod. The shells of these animals are about a centimetre in size. The tip of the shell extends beyond the rear extremity of the shell's aperture, and the shell is "endogastric" in shape.

No picture of Helcionella was found. Wikipedia, Wikidata, iDigBio and Smithsonian Open Access were searched and had none. GBIF was asked, and what came back is not recorded: nothing, or a picture this site could not tie to Helcionella, or no answer at all. This entry cannot say which.

On record

Recorded, not inferred
Sits inside
HelcionellidaePBDB
Diet
detritivorePBDB, for Helcionellidae
Life habit
low-level epifaunalPBDB, for Helcionellidae
Motility
slow-movingPBDB, for Helcionellidae
Vision
limitedPBDB, for Helcionelloida
Environment
marinePBDB, for Helcionelloida

Time the record covers

At least 33 million years on record.

The record covers at least 530.7 Mya to 497 Mya. No occurrence read is dated outside 538.8 Mya to 486.85 Mya.

Cambrian — about 93 of 93 occurrencesCambrianOrdovician — about 0 of 93 occurrences540–538 Mya — about 1 occurrence538–536 Mya — about 2 occurrences536–534 Mya — about 2 occurrences534–533 Mya — about 2 occurrences533–531 Mya — about 2 occurrences531–529 Mya — about 3 occurrences529–527 Mya — about 3 occurrences527–525 Mya — about 3 occurrences525–524 Mya — about 7 occurrences524–522 Mya — about 7 occurrences522–520 Mya — about 4 occurrences520–518 Mya — about 2 occurrences518–516 Mya — about 2 occurrences516–515 Mya — about 4 occurrences515–513 Mya — about 6 occurrences513–511 Mya — about 6 occurrences511–509 Mya — about 6 occurrences509–507 Mya — about 6 occurrences507–506 Mya — about 7 occurrences506–504 Mya — about 5 occurrences504–502 Mya — about 3 occurrences502–500 Mya — about 4 occurrences500–498 Mya — about 2 occurrences498–497 Mya — about 0.8 occurrences497–495 Mya — about 0.4 occurrences495–493 Mya — about 0.4 occurrences493–491 Mya — about 0.4 occurrences491–489 Mya — about 0.4 occurrences489–488 Mya — about 0.4 occurrences488–486 Mya — about 0.1 occurrences530.7 Mya497 Mya540 Mya486 Mya

93 occurrences of Helcionella 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

93 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

49 formations

Zhujiaqing — 25.64°N, 103.07°EZhujiaqing — 26.38°N, 103.07°EZhujiaqing — 24.73°N, 102.57°EZhujiaqing — 25.52°N, 103.07°EZhujiaqing — 26.28°N, 103.22°EYanjiahe — 30.73°N, 111.08°EYanjiahe — 30.78°N, 111.35°EShady — 36.85°N, 80.91°WShady — 36.85°N, 80.90°WShady — 36.87°N, 80.98°WChapel Island — 47.00°N, 56.00°WChapel Island — 47.07°N, 55.87°WKinzers — 40.04°N, 76.31°WKinzers — 40.12°N, 76.33°WKinzers — 40.07°N, 76.37°WUst-Yudoma — 57.35°N, 131.20°EUst-Yudoma — 57.67°N, 131.83°EJbel Wawrmast — 30.67°N, 8.17°WJbel Wawrmast — 31.09°N, 8.13°WTannenknock — 50.20°N, 11.56°EMt. Whyte — 51.50°N, 116.50°WMt. Whyte — 50.90°N, 115.62°WMt. Whyte — 51.42°N, 116.40°WRingstrand — 60.90°N, 10.73°ERingstrand — 60.95°N, 10.78°EPestrotsvet — 57.67°N, 131.83°EPestrotsvet — 57.40°N, 132.73°ELáncara — 42.58°N, 5.42°WHuangshandong — 30.70°N, 111.28°EJince — 49.78°N, 13.97°EJince — 49.96°N, 13.74°EMernmerna — 31.19°S, 138.87°EDelitzsch — 51.62°N, 13.35°EMedvezhya — 71.33°N, 99.50°EManykay — 70.67°N, 103.00°EManykay — 70.72°N, 112.76°ESchodack — 42.53°N, 73.69°WLangston — 42.19°N, 112.25°WRanken Limestone — 19.63°S, 136.92°ESt. Albans Shale — 44.48°N, 73.21°WHatch Hill — 42.31°N, 73.77°WSkeels Corner Slate — 44.78°N, 73.11°W

Loading coastlines…

The named rock units Helcionella has been recovered from, largest first. Drawn where the rock is now, not where it formed. 25 further formations hold fewer occurrences each and are not listed. 1 occurrence has no formation on record, which is common for older literature.

Helcionella and its relatives

Cambrian

Where Helcionella and its relatives were recorded in the Cambrian.

Found in the same rock

654 taxa

The Paleobiology Database records 79 sites for Helcionella, 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

51 references

Each of the 93 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. 39 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 content0

No picture of Helcionella was found. Wikipedia, Wikidata, iDigBio and Smithsonian Open Access were searched and had none.

GBIF was asked, and what came back is not recorded: nothing, or a picture this site could not tie to Helcionella, or no answer at all. This entry cannot say which.

No 3D scan was found. Smithsonian Open Access, MorphoSource and Sketchfab were all searched.

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 itHelcionellidae through timeFormations of the CambrianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Grabau and Shimer 1909