Barnesoceras

Barnesoceras is a genus of moderately large, Lower Ordovician ellesmoerceratids with a simple, but strongly cyrtoconic shell that expands in the vertical dimension more rapidly than in the horizontal, resulting in its being laterally compressed. The aperture is simple, unconstricted, and straight sided from in front. Growth lines show a broad crest on either side that swings forward above the ventral hyponomic sinus. Septa are close spaced and have a shallow curvature. The body, or living, chamber takes up much of the shell. The siphuncle is ventral, close to the longitudinally concave side.

No picture of Barnesoceras 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 Barnesoceras, or no answer at all. This entry cannot say which.

On record

Recorded, not inferred
Sits inside
EllesmeroceratidaePBDB
Diet
carnivorePBDB, for Cephalopoda
Life habit
nektobenthic, solitaryPBDB, for Ellesmerocerida
Motility
actively mobilePBDB, for Ellesmerocerida
Vision
well-developedPBDB, for Cephalopoda
Environment
marinePBDB, for Ellesmerocerida

Time the record covers

At most 9.8 million years on record.

Every occurrence read is dated to somewhere between 486.85 Mya and 477.1 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Cambrian — about 0 of 9 occurrencesOrdovician — about 9 of 9 occurrencesOrdovician487–487 Mya — about 0.2 occurrences487–486 Mya — about 0.3 occurrences486–486 Mya — about 0.3 occurrences486–486 Mya — about 0.3 occurrences486–485 Mya — about 0.3 occurrences485–485 Mya — about 0.3 occurrences485–484 Mya — about 0.3 occurrences484–484 Mya — about 0.3 occurrences484–484 Mya — about 0.3 occurrences484–483 Mya — about 0.3 occurrences483–483 Mya — about 0.3 occurrences483–483 Mya — about 0.3 occurrences483–482 Mya — about 0.3 occurrences482–482 Mya — about 0.3 occurrences482–482 Mya — about 0.3 occurrences482–481 Mya — about 0.3 occurrences481–481 Mya — about 0.3 occurrences481–481 Mya — about 0.3 occurrences481–480 Mya — about 0.3 occurrences480–480 Mya — about 0.3 occurrences480–479 Mya — about 0.3 occurrences479–479 Mya — about 0.3 occurrences479–479 Mya — about 0.3 occurrences479–478 Mya — about 0.3 occurrences478–478 Mya — about 0.3 occurrences478–478 Mya — about 0.3 occurrences478–477 Mya — about 0.3 occurrences477–477 Mya — about 0.2 occurrences487.4 Mya476.6 Mya

9 occurrences of Barnesoceras 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

9 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

2 formations

Tanyard — 30.46°N, 99.13°WYeli — 39.00°N, 115.00°E

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

Barnesoceras and its relatives

Ordovician

Where Barnesoceras and its relatives were recorded in the Ordovician.

Found in the same rock

29 taxa

The Paleobiology Database records 2 sites for Barnesoceras, 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

2 references

Each of the 9 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. Each entry links to the Paleobiology Database's own record for the work.

Media and terms

Media content0

No picture of Barnesoceras 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 Barnesoceras, or no answer at all. This entry cannot say which.

No 3D scan of Barnesoceras 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 itEllesmeroceratidae through timeFormations of the OrdovicianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Flower 1964