Adnatoceras

Adnatoceras is a genus of mid Devonian to Pennsylvanian orthoconic nautiloid cephalopods included in the pseudorthocerid family Spyroceratidae, characterized by tubular, straight-sided, siphuncle segments that expand abruptly at the septal foremen. In some species the siphuncle segments become more ovoid in the later grow stages. The name Adnatoceas comes from the wide area of contact, or adnation, between the connecting ring and flared out brim of the septal neck.

Adnatoceras

via iDigBio · CC0 · via iDigBio. 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
SpyroceratidaePBDB
Diet
carnivorePBDB, for Cephalopoda
Life habit
nektonicPBDB, for Cephalopoda
Motility
fast-movingPBDB, for Cephalopoda
Vision
well-developedPBDB, for Cephalopoda
Environment
marinePBDB, for Cephalopoda

Time the record covers

At least 6.9 million years on record.

The record covers at least 330.3 Mya to 323.4 Mya. No occurrence read is dated outside 335.9 Mya to 315.2 Mya.

Carboniferous — about 2 of 2 occurrencesCarboniferous336–336 Mya — about 0.0 occurrences336–335 Mya — about 0.1 occurrences335–334 Mya — about 0.1 occurrences334–334 Mya — about 0.1 occurrences334–333 Mya — about 0.1 occurrences333–332 Mya — about 0.1 occurrences332–331 Mya — about 0.1 occurrences331–331 Mya — about 0.1 occurrences331–330 Mya — about 0.1 occurrences324–323 Mya — about 0.0 occurrences323–323 Mya — about 0.1 occurrences323–322 Mya — about 0.1 occurrences322–321 Mya — about 0.1 occurrences321–320 Mya — about 0.1 occurrences320–320 Mya — about 0.1 occurrences320–319 Mya — about 0.1 occurrences319–318 Mya — about 0.1 occurrences318–318 Mya — about 0.1 occurrences318–317 Mya — about 0.1 occurrences317–316 Mya — about 0.1 occurrences316–315 Mya — about 0.1 occurrences315–315 Mya — about 0.0 occurrences330.3 Mya323.4 Mya336.4 Mya314.7 Mya

2 occurrences of Adnatoceras on record, most of them in the Carboniferous. 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

2 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

Solonchan — 62.00°N, 129.67°EMoorefield — 35.76°N, 91.58°W

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

Adnatoceras and its relatives

Carboniferous

Where Adnatoceras and its relatives were recorded in the Carboniferous.

Found in the same rock

9 taxa

The Paleobiology Database records 2 sites for Adnatoceras, 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

2 references

Each of the 2 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 Adnatoceras

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

No 3D scan of Adnatoceras 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 itSpyroceratidae through timeFormations of the CarboniferousThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Flower 1939