Asymptoceras

Asymptoceras is a genus of aipoceratids (Nautiloidea) similar to Aipoceras but tightly coiled and with only part of the body chamber divergent from the previous whorl. Shell evolute, expanding fairly rapidly; umbilicus open, perforate; whorl section ovoid to subquadrate.

Asymptoceras

Geological Survey of Texas; Dumble, E. T, (Edwin Theodore. 1852-1927 · Public Domain · via Wikipedia/Commons. 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
AipoceratidaePBDB
Diet
carnivorePBDB, for Nautilida
Life habit
nektobenthicPBDB, for Nautilida
Motility
actively mobilePBDB, for Nautilida
Vision
well-developedPBDB, for Cephalopoda
Environment
marinePBDB, for Cephalopoda

Time the record covers

At least 9.6 million years on record.

The record covers at least 339.9 Mya to 330.3 Mya. No occurrence read is dated outside 353.7 Mya to 326.9 Mya.

Carboniferous — about 4 of 4 occurrencesCarboniferous354–353 Mya — about 0.0 occurrences353–352 Mya — about 0.1 occurrences352–351 Mya — about 0.1 occurrences351–351 Mya — about 0.1 occurrences351–350 Mya — about 0.1 occurrences350–349 Mya — about 0.1 occurrences349–348 Mya — about 0.1 occurrences348–347 Mya — about 0.1 occurrences347–346 Mya — about 0.2 occurrences346–345 Mya — about 0.2 occurrences345–344 Mya — about 0.2 occurrences344–343 Mya — about 0.2 occurrences343–342 Mya — about 0.2 occurrences342–341 Mya — about 0.2 occurrences341–340 Mya — about 0.2 occurrences340–339 Mya — about 0.1 occurrences331–330 Mya — about 0.1 occurrences330–329 Mya — about 0.5 occurrences329–328 Mya — about 0.5 occurrences328–327 Mya — about 0.5 occurrences327–326 Mya — about 0.2 occurrences339.9 Mya330.3 Mya354.2 Mya326.4 Mya

4 occurrences of Asymptoceras 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

4 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

Feltrim — 53.43°N, 6.20°W

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The named rock units Asymptoceras has been recovered from, largest first. Drawn where the rock is now, not where it formed. 3 occurrences have no formation on record, which is common for older literature.

Asymptoceras and its relatives

Carboniferous

Where Asymptoceras and its relatives were recorded in the Carboniferous.

Found in the same rock

143 taxa

The Paleobiology Database records 3 sites for Asymptoceras, 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 4 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 content2

Picture of Asymptoceras

Credit
Geological Survey of Texas; Dumble, E. T, (Edwin Theodore. 1852-1927
Licence
Public Domain
Commercial use
the licence allows it

3D model

Source
Sketchfab
Licence
CC Attribution-NonCommercial-ShareAlike
Commercial use
the licence does not allow it

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 itAipoceratidae through timeFormations of the CarboniferousThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Ryckholt 1852