Helicotoma

Helicotoma

via iDigBio · CC0 · via iDigBio. 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
HelicotomidaePBDB
Diet
suspension feederPBDB
Life habit
epifaunalPBDB
Motility
stationaryPBDB
Vision
limitedPBDB, for Gastropoda

Time the record covers

At least 26 million years on record.

The record covers at least 471.3 Mya to 445.2 Mya. No occurrence read is dated outside 483.4 Mya to 443.1 Mya.

Ordovician — about 105 of 105 occurrencesOrdovicianSilurian — about 0 of 105 occurrences484–483 Mya — about 0.0 occurrences483–481 Mya — about 0.1 occurrences481–480 Mya — about 0.3 occurrences480–479 Mya — about 0.3 occurrences479–477 Mya — about 0.3 occurrences477–476 Mya — about 0.8 occurrences476–474 Mya — about 0.9 occurrences474–473 Mya — about 0.9 occurrences473–472 Mya — about 0.9 occurrences472–470 Mya — about 3 occurrences470–469 Mya — about 2 occurrences469–467 Mya — about 2 occurrences467–466 Mya — about 2 occurrences466–465 Mya — about 2 occurrences465–463 Mya — about 2 occurrences463–462 Mya — about 2 occurrences462–460 Mya — about 2 occurrences460–459 Mya — about 3 occurrences459–458 Mya — about 3 occurrences458–456 Mya — about 11 occurrences456–455 Mya — about 14 occurrences455–453 Mya — about 13 occurrences453–452 Mya — about 10 occurrences452–451 Mya — about 10 occurrences451–449 Mya — about 9 occurrences449–448 Mya — about 4 occurrences448–446 Mya — about 3 occurrences446–445 Mya — about 3 occurrences445–444 Mya — about 1 occurrence444–442 Mya — about 0.5 occurrences471.3 Mya445.2 Mya484.2 Mya442.3 Mya

105 occurrences of Helicotoma on record, most of them in the Ordovician. 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

105 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

44 formations

Cliffield — 37.09°N, 81.34°WCliffield — 37.15°N, 81.49°WCliffield — 37.08°N, 81.71°WCliffield — 37.13°N, 81.41°WCliffield — 37.17°N, 81.48°WWitten Limestone — 37.20°N, 81.36°WWitten Limestone — 37.11°N, 81.52°WWitten Limestone — 37.02°N, 81.63°WWitten Limestone — 37.00°N, 81.00°WWitten Limestone — 37.03°N, 81.79°WWitten Limestone — 37.10°N, 81.62°WChaumont — 45.45°N, 76.69°WChaumont — 45.88°N, 76.93°WChaumont — 45.41°N, 75.73°WChaumont — 45.43°N, 75.53°WChaumont — 45.47°N, 74.81°WCape Weber — 73.78°N, 24.63°WCape Weber — 73.69°N, 24.63°WCape Weber — 73.53°N, 24.71°WBobcaygeon — 44.67°N, 78.80°WBobcaygeon — 44.53°N, 78.55°WBobcaygeon — 45.88°N, 76.93°WKangaroo Creek — 41.36°N, 122.68°WMurfreesboro Limestone — 35.50°N, 86.50°WVerulam — 44.45°N, 78.70°WVerulam — 44.43°N, 78.78°WPort Clarence Limestone — 65.50°N, 165.92°WNora — 23.05°S, 139.23°ECarters Limestone — 35.50°N, 86.50°WGrand Detour — 42.00°N, 90.50°WGrand Detour — 42.55°N, 89.23°WQuimbys Mill — 42.00°N, 90.50°WQuimbys Mill — 41.85°N, 89.48°WGull River — 44.67°N, 78.80°WStonington — 45.67°N, 86.97°WTyrone Limestone — 37.82°N, 84.72°WTyrone Limestone — 37.83°N, 84.55°WLowville — 45.42°N, 75.70°WLowville — 45.45°N, 75.59°WMcGregor — 42.51°N, 89.03°WMcGregor — 42.00°N, 89.39°WGeorgian Bay — 45.90°N, 82.26°WDecorah — 39.12°N, 90.97°WLaval — 45.58°N, 74.00°WWhitewater — 39.00°N, 84.00°WElnes — 60.00°N, 11.00°ESarka — 50.00°N, 14.00°E

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The named rock units Helicotoma has been recovered from, largest first. Drawn where the rock is now, not where it formed. 20 further formations hold fewer occurrences each and are not listed. 6 occurrences have no formation on record, which is common for older literature.

Helicotoma and its relatives

Ordovician

Where Helicotoma and its relatives were recorded in the Ordovician.

Found in the same rock

994 taxa

The Paleobiology Database records 93 sites for Helicotoma, 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

36 references

Each of the 105 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. 24 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 Helicotoma

Source
iDigBio
Credit
via iDigBio
Licence
CC0
Commercial use
the licence allows it

No 3D scan of Helicotoma was found in MorphoSource and Sketchfab.

Smithsonian Open Access was 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 itHelicotomidae through timeFormations of the OrdovicianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Salter 1859