Alaskadiscus subacutus

Alaskadiscus subacutus (Ulrich & Scofield, 1897), a relative of Alaskadiscus subacutus — not Alaskadiscus subacutus itself

Not Alaskadiscus subacutus. This is Alaskadiscus subacutus (Ulrich & Scofield, 1897), a relative — both are Tropidodiscidae.

via GBIF · CC0 · via GBIF. 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
AlaskodiscusPBDB
Diet
detritivorePBDB, for Bellerophontoidea
Life habit
low-level epifaunalPBDB, for Bellerophontoidea
Motility
slow-movingPBDB, for Bellerophontoidea
Vision
limitedPBDB, for Gastropoda
Environment
marinePBDB, for Bellerophontida

Time the record covers

At least 6.3 million years on record.

The record covers at least 457.3 Mya to 451 Mya. No occurrence read is dated outside 471.3 Mya to 449.6 Mya.

Ordovician — about 30 of 30 occurrencesOrdovician472–471 Mya — about 0.0 occurrences471–470 Mya — about 0.1 occurrences470–470 Mya — about 0.1 occurrences470–469 Mya — about 0.1 occurrences469–468 Mya — about 0.1 occurrences468–467 Mya — about 0.1 occurrences467–467 Mya — about 0.1 occurrences467–466 Mya — about 0.1 occurrences466–465 Mya — about 0.1 occurrences465–464 Mya — about 0.1 occurrences464–463 Mya — about 0.1 occurrences463–463 Mya — about 0.1 occurrences463–462 Mya — about 0.1 occurrences462–461 Mya — about 0.1 occurrences461–460 Mya — about 0.1 occurrences460–460 Mya — about 0.1 occurrences460–459 Mya — about 0.1 occurrences459–458 Mya — about 0.1 occurrences458–457 Mya — about 0.1 occurrences457–457 Mya — about 2 occurrences457–456 Mya — about 2 occurrences456–455 Mya — about 2 occurrences455–454 Mya — about 2 occurrences454–454 Mya — about 3 occurrences454–453 Mya — about 3 occurrences453–452 Mya — about 3 occurrences452–451 Mya — about 3 occurrences451–451 Mya — about 4 occurrences451–450 Mya — about 3 occurrences450–449 Mya — about 0.7 occurrences457.3 Mya451 Mya471.8 Mya449.1 Mya

30 occurrences of Alaskadiscus subacutus 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

30 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

17 formations

Lexington Limestone — 37.99°N, 84.45°WLexington Limestone — 38.07°N, 84.52°WLexington Limestone — 38.17°N, 84.84°WLexington Limestone — 37.64°N, 84.66°WLexington Limestone — 37.67°N, 84.94°WLexington Limestone — 37.77°N, 84.61°WDunleith — 42.00°N, 90.50°WLexington — 37.79°N, 84.50°WLexington — 37.65°N, 84.77°WBigby-Cannon Limestone — 35.50°N, 86.50°WPlatteville — 46.00°N, 94.00°WCummingsville — 46.00°N, 94.00°WProsser Limestone — 46.00°N, 94.00°WStewartville — 46.00°N, 94.00°WPecatonica — 42.00°N, 90.50°WMifflin — 42.00°N, 90.50°WGrand Detour — 42.00°N, 90.50°WNachusa — 42.00°N, 90.50°WQuimbys Mill — 42.00°N, 90.50°WSpechts Ferry — 42.00°N, 90.50°WWise Lake — 42.00°N, 90.50°WLittle Oak — 33.31°N, 86.78°WTyrone Limestone — 37.83°N, 84.63°W

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

Alaskadiscus subacutus and its relatives

Ordovician

Where Alaskadiscus subacutus and its relatives were recorded in the Ordovician.

Found in the same rock

226 taxa

The Paleobiology Database records 30 sites for Alaskadiscus subacutus, 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

5 references

Each of the 30 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 content1

Picture of Alaskadiscus subacutus (Ulrich & Scofield, 1897)

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

No 3D scan of Alaskadiscus subacutus 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 itAlaskodiscus through timeFormations of the OrdovicianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Ulrich and Scofield 1897)