Trocholites

Trocholites is a tarphycerid genus in the family Trocholitidae from the Middle and Late Ordovician with a gradually expanding, weakly ribbed shell; whorls in contact, dorsum slightly impressed; cross section depressed, venter and sides rounded; siphuncle close to but not at the dorsal margin.

Trocholites

American Museum of Natural History.; Whitfield, R. P. · Public Domain · 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
TrocholitidaePBDB
Diet
carnivorePBDB, for Cephalopoda
Life habit
nektobenthicPBDB, for Tarphycerida
Motility
fast-movingPBDB, for Cephalopoda
Vision
well-developedPBDB, for Cephalopoda
Environment
marinePBDB, for Cephalopoda

Time the record covers

At least 22 million years on record.

The record covers at least 471.3 Mya to 448.8 Mya. No occurrence read is dated outside 483.4 Mya to 443.1 Mya.

Ordovician — about 52 of 52 occurrencesOrdovicianSilurian — about 0 of 52 occurrences484–483 Mya — about 0.0 occurrences483–481 Mya — about 0.1 occurrences481–480 Mya — about 0.1 occurrences480–479 Mya — about 0.1 occurrences479–477 Mya — about 0.1 occurrences477–476 Mya — about 0.2 occurrences476–474 Mya — about 0.2 occurrences474–473 Mya — about 0.2 occurrences473–472 Mya — about 0.2 occurrences472–470 Mya — about 0.8 occurrences470–469 Mya — about 0.9 occurrences469–467 Mya — about 0.8 occurrences467–466 Mya — about 1.0 occurrences466–465 Mya — about 1.0 occurrences465–463 Mya — about 2 occurrences463–462 Mya — about 3 occurrences462–460 Mya — about 6 occurrences460–459 Mya — about 7 occurrences459–458 Mya — about 3 occurrences458–456 Mya — about 2 occurrences456–455 Mya — about 2 occurrences455–453 Mya — about 2 occurrences453–452 Mya — about 3 occurrences452–451 Mya — about 6 occurrences451–449 Mya — about 7 occurrences449–448 Mya — about 1 occurrence448–446 Mya — about 1 occurrence446–445 Mya — about 1.0 occurrences445–444 Mya — about 0.2 occurrences444–442 Mya — about 0.1 occurrences471.3 Mya448.8 Mya484.2 Mya442.3 Mya

52 occurrences of Trocholites 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

52 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

33 formations

Denley Limestone — 43.21°N, 75.46°WDenley Limestone — 44.00°N, 75.00°WDenley Limestone — 43.28°N, 75.14°WKope — 38.87°N, 84.46°WKope — 39.00°N, 84.00°WKope — 39.03°N, 84.54°WDobrotiva — 49.71°N, 13.51°EDobrotiva — 50.18°N, 14.68°EElnes — 59.90°N, 10.67°EElnes — 59.90°N, 10.63°EElnes — 60.70°N, 10.35°EElnes — 60.00°N, 11.17°ESeby Limestone — 57.00°N, 17.00°ESeby Limestone — 60.91°N, 15.02°ESeby Limestone — 62.97°N, 14.48°EFossil Hill Limestone — 34.00°S, 148.00°EFossil Hill Limestone — 33.59°S, 148.89°EFolkeslunda — 57.00°N, 17.00°EFolkeslunda — 60.91°N, 15.02°EValcour — 44.87°N, 73.41°WShihtien — 24.77°N, 99.15°ECaesar Canyon Limestone — 39.09°N, 116.85°WCorryville — 39.00°N, 84.00°WMount Auburn — 39.00°N, 84.00°WDaylesford Limestone — 33.32°S, 148.82°EGullhogen Mudstone — 58.00°N, 14.00°ERyd Limestone — 58.00°N, 14.00°EBaota — 29.00°N, 109.00°ELengshuigou — 23.00°N, 104.00°EDachao — 27.00°N, 100.00°EMaJiaGou — 42.00°N, 126.00°EXia MaJiaGou — 42.00°N, 126.00°EKanKing — 41.00°N, 79.00°EAmadjuak — 66.00°N, 69.83°WLindsay — 45.50°N, 81.00°WFort Cassin — 44.21°N, 73.25°W

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The named rock units Trocholites has been recovered from, largest first. Drawn where the rock is now, not where it formed. 9 further formations hold fewer occurrences each and are not listed. 1 occurrence has no formation on record, which is common for older literature.

Trocholites and its relatives

Ordovician

Where Trocholites and its relatives were recorded in the Ordovician.

Found in the same rock

644 taxa

The Paleobiology Database records 50 sites for Trocholites, 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

29 references

Each of the 52 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. 17 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 Trocholites

Credit
American Museum of Natural History.; Whitfield, R. P.
Licence
Public Domain
Commercial use
the licence allows it

No 3D scan of Trocholites 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.

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 itTrocholitidae through timeFormations of the OrdovicianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Conrad 1838