Hardmanoceras

Hardmanoceras is a tarphycerid genus belonging to the Trocholitidae from the upper Lower Ordovician to possibly the lower Middle Ordovician, found in Western Australia. Hardmanoceras is like Discoceras but prominently ribbed and with a depressed whorl section. The body, or living, chamber is long, 1 1/8 volutions long. The ultimate portion is slightly divergent, not an uncommon characteristic of tarphycerids.

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

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 18 million years on record.

The record covers at least 477.1 Mya to 458.2 Mya. No occurrence read is dated outside 488.9 Mya to 457.2 Mya.

Cambrian — about 0 of 6 occurrencesOrdovician — about 6 of 6 occurrencesOrdovician490–488 Mya — about 0.0 occurrences488–487 Mya — about 0.0 occurrences487–486 Mya — about 0.1 occurrences486–485 Mya — about 0.2 occurrences485–484 Mya — about 0.2 occurrences484–483 Mya — about 0.2 occurrences483–482 Mya — about 0.2 occurrences482–481 Mya — about 0.2 occurrences481–480 Mya — about 0.2 occurrences480–479 Mya — about 0.2 occurrences479–477 Mya — about 0.2 occurrences477–476 Mya — about 0.4 occurrences476–475 Mya — about 0.5 occurrences475–474 Mya — about 0.5 occurrences474–473 Mya — about 0.5 occurrences473–472 Mya — about 0.5 occurrences472–471 Mya — about 0.3 occurrences471–470 Mya — about 0.0 occurrences470–469 Mya — about 0.0 occurrences469–468 Mya — about 0.0 occurrences468–466 Mya — about 0.0 occurrences466–465 Mya — about 0.0 occurrences465–464 Mya — about 0.0 occurrences464–463 Mya — about 0.0 occurrences463–462 Mya — about 0.0 occurrences462–461 Mya — about 0.0 occurrences461–460 Mya — about 0.0 occurrences460–459 Mya — about 0.0 occurrences459–458 Mya — about 0.6 occurrences458–457 Mya — about 0.5 occurrences477.1 Mya458.2 Mya489.5 Mya456.6 Mya

6 occurrences of Hardmanoceras 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

6 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

5 formations

Lower Setul — 6.42°N, 99.90°EDaylesford Limestone — 33.00°S, 149.00°EEmanuel — 18.22°S, 125.56°EThung Song — 6.71°N, 99.65°ELiangjiashan — 43.58°N, 125.17°E

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

Hardmanoceras and its relatives

Ordovician

Where Hardmanoceras and its relatives were recorded in the Ordovician.

Found in the same rock

18 taxa

The Paleobiology Database records 5 sites for Hardmanoceras, and this reads all of them. The number is how many of those sites it was catalogued from too.

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

5 references

Each of the 6 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. 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 Hardmanoceras was found. Wikipedia, Wikidata and iDigBio were searched and had none.

Smithsonian Open Access did not answer, so this is what the others held rather than everything there is.

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

No 3D scan of Hardmanoceras 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 itTrocholitidae through timeFormations of the OrdovicianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Teichert and Glenister 1952