Ermoceras

Ermoceras is a genus of ammonite belonging to the family Stephanoceratidae of the Middle Jurassic found in deposites of central Arabia, Sinai, and Algeria with strong primary and secondary ribs and a single row of lateral tubercles; described as having a deep ventral groove

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

On record

Recorded, not inferred
Sits inside
StephanoceratidaePBDB
Diet
carnivorePBDB, for Ammonoidea
Life habit
nektonicPBDB, for Ammonoidea
Motility
fast-movingPBDB, for Ammonoidea
Vision
well-developedPBDB, for Cephalopoda
Environment
marinePBDB, for Cephalopoda

Time the record covers

At most 5.6 million years on record.

Every occurrence read is dated to somewhere between 170.9 Mya and 165.3 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Middle Jurassic — about 31 of 31 occurrencesMiddle Jurassic171–171 Mya — about 1 occurrence171–171 Mya — about 2 occurrences171–170 Mya — about 2 occurrences170–170 Mya — about 2 occurrences170–170 Mya — about 2 occurrences170–170 Mya — about 2 occurrences170–169 Mya — about 2 occurrences169–169 Mya — about 2 occurrences169–169 Mya — about 2 occurrences169–169 Mya — about 2 occurrences169–169 Mya — about 3 occurrences169–168 Mya — about 5 occurrences168–168 Mya — about 3 occurrences168–168 Mya — about 0.2 occurrences168–168 Mya — about 0.2 occurrences168–167 Mya — about 0.2 occurrences167–167 Mya — about 0.2 occurrences167–167 Mya — about 0.2 occurrences167–167 Mya — about 0.2 occurrences167–167 Mya — about 0.2 occurrences167–166 Mya — about 0.2 occurrences166–166 Mya — about 0.2 occurrences166–166 Mya — about 0.2 occurrences166–166 Mya — about 0.2 occurrences166–165 Mya — about 0.2 occurrences165–165 Mya — about 0.1 occurrences171.4 Mya164.8 Mya

31 occurrences of Ermoceras on record, most of them in the Middle Jurassic. 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

31 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

1 formation

Dhruma — 24.23°N, 46.58°EDhruma — 23.97°N, 45.17°EDhruma — 23.80°N, 46.17°EDhruma — 23.67°N, 46.17°EDhruma — 23.30°N, 46.33°EDhruma — 23.20°N, 46.33°EDhruma — 22.62°N, 46.00°EDhruma — 22.53°N, 46.17°EDhruma — 22.45°N, 46.00°EDhruma — 25.33°N, 45.50°EDhruma — 25.50°N, 45.00°EDhruma — 24.08°N, 45.50°EDhruma — 25.52°N, 45.19°EDhruma — 25.38°N, 45.35°EDhruma — 24.55°N, 46.13°E

Loading coastlines…

The named rock units Ermoceras has been recovered from, largest first. Drawn where the rock is now, not where it formed. 4 occurrences have no formation on record, which is common for older literature.

Ermoceras and its relatives

Middle Jurassic

Where Ermoceras and its relatives were recorded in the Middle Jurassic.

Found in the same rock

98 taxa

The Paleobiology Database records 25 sites for Ermoceras, 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

3 references

Each of the 31 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 Ermoceras was found. Wikipedia, Wikidata, iDigBio and Smithsonian Open Access were searched and had none.

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

No 3D scan was found. Smithsonian Open Access, MorphoSource and Sketchfab were all searched.

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 itStephanoceratidae through timeFormations of the Middle JurassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Douvillé 1916