Eremoceras

Eremoceras is a genus in the Ellesmeroceratidae which lived during the Early Ordovician, characterized by an orthoconic adult stage, similar to Ellesmeroceras, but with the dorsal side of the adult living chamber somewhat convex, and a juvenile portion that is more gradually expanding and ventrally concave. The siphuncle is ventral, partitioned by diaphragms as typical for the family. Siphuncle segments have short septal necks and thick connecting rings.

No picture of Eremoceras 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 Eremoceras, 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 18 million years on record.

Every occurrence read is dated to somewhere between 488.9 Mya and 471.3 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Cambrian — about 0 of 21 occurrencesCambrianOrdovician — about 21 of 21 occurrencesOrdovician489–489 Mya — about 0.0 occurrences489–488 Mya — about 0.1 occurrences488–488 Mya — about 0.1 occurrences488–487 Mya — about 0.1 occurrences487–486 Mya — about 1 occurrence486–486 Mya — about 2 occurrences486–485 Mya — about 2 occurrences485–484 Mya — about 2 occurrences484–484 Mya — about 2 occurrences484–483 Mya — about 1 occurrence483–483 Mya — about 1 occurrence483–482 Mya — about 1 occurrence482–481 Mya — about 1 occurrence481–481 Mya — about 1 occurrence481–480 Mya — about 1 occurrence480–479 Mya — about 1 occurrence479–479 Mya — about 1 occurrence479–478 Mya — about 1 occurrence478–478 Mya — about 1 occurrence478–477 Mya — about 1.0 occurrences477–476 Mya — about 0.1 occurrences476–476 Mya — about 0.1 occurrences476–475 Mya — about 0.1 occurrences475–475 Mya — about 0.1 occurrences475–474 Mya — about 0.1 occurrences474–473 Mya — about 0.1 occurrences473–473 Mya — about 0.1 occurrences473–472 Mya — about 0.1 occurrences472–471 Mya — about 0.1 occurrences471–471 Mya — about 0.0 occurrences489.4 Mya470.8 Mya

21 occurrences of Eremoceras 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

21 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

6 formations

Oneota Dolomite — 43.02°N, 91.18°WOneota Dolomite — 43.54°N, 91.18°WOneota Dolomite — 44.40°N, 92.08°WGreat Meadows — 43.91°N, 73.42°WGreat Meadows — 43.42°N, 73.48°WGasconade — 37.13°N, 91.35°WGasconade — 38.97°N, 91.21°WGasconade Dolomite — 37.19°N, 91.18°WGasconade Dolomite — 37.95°N, 91.38°WTribes Hill — 43.47°N, 73.41°WChepultepec — 39.64°N, 77.72°W

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The named rock units Eremoceras has been recovered from, largest first. Drawn where the rock is now, not where it formed. 2 occurrences have no formation on record, which is common for older literature.

Eremoceras and its relatives

Ordovician

Where Eremoceras and its relatives were recorded in the Ordovician.

Found in the same rock

89 taxa

The Paleobiology Database records 14 sites for Eremoceras, 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

4 references

Each of the 21 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 Eremoceras 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 Eremoceras, or no answer at all. This entry cannot say which.

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

Occurrence data from the Paleobiology Database, CC BY 4.0. Hyatt 1884