Aulacostephanus

Aulacostephanus is an extinct ammonoid cephalopod genus from the Upper Jurassic Tithonian belonging to the perisphinctoidean family Aulacostephanidae.

Aulacostephanus

Hectonichus · CC BY-SA 3.0 · 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
AulacostephanidaePBDB
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 least 13 million years on record.

The record covers at least 152.21 Mya to 139.1 Mya. No occurrence read is dated outside 161.5 Mya to 137.05 Mya.

Middle Jurassic — about 0 of 88 occurrencesLate Jurassic — about 87 of 88 occurrencesLate JurassicEarly Cretaceous — about 1 of 88 occurrencesEarly Cretaceous162–161 Mya — about 0.1 occurrences161–160 Mya — about 0.3 occurrences160–159 Mya — about 0.3 occurrences159–159 Mya — about 0.3 occurrences159–158 Mya — about 0.3 occurrences158–157 Mya — about 0.3 occurrences157–156 Mya — about 0.3 occurrences156–155 Mya — about 0.3 occurrences155–154 Mya — about 2 occurrences154–154 Mya — about 4 occurrences154–153 Mya — about 4 occurrences153–152 Mya — about 11 occurrences152–151 Mya — about 20 occurrences151–150 Mya — about 20 occurrences150–149 Mya — about 20 occurrences149–148 Mya — about 2 occurrences148–148 Mya — about 0.6 occurrences148–147 Mya — about 0.6 occurrences147–146 Mya — about 0.6 occurrences146–145 Mya — about 0.6 occurrences145–144 Mya — about 0.6 occurrences144–143 Mya — about 0.6 occurrences143–142 Mya — about 0.2 occurrences142–142 Mya — about 0.0 occurrences142–141 Mya — about 0.0 occurrences140–139 Mya — about 0.0 occurrences139–138 Mya — about 0.4 occurrences138–137 Mya — about 0.4 occurrences137–137 Mya — about 0.2 occurrences152.21 Mya139.1 Mya162 Mya136.6 Mya

88 occurrences of Aulacostephanus on record, most of them in the Late 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

88 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

7 formations

Reuchenette — 47.40°N, 7.03°ENovikovo — 56.05°N, 46.47°EMezmayskaya — 44.28°N, 40.15°EMezmayskaya — 44.17°N, 40.82°EGerpigem- Mezmayskaya — 44.23°N, 40.17°EGerpigem- Mezmayskaya — 44.13°N, 40.85°EKimmeridge Clay — 50.72°N, 2.77°WGory Neveb — 44.18°N, 39.20°ERio Tascadero — 30.88°S, 70.53°W

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The named rock units Aulacostephanus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 76 occurrences have no formation on record, which is common for older literature.

Aulacostephanus and its relatives

Late Jurassic

Where Aulacostephanus and its relatives were recorded in the Late Jurassic.

Found in the same rock

123 taxa

The Paleobiology Database records 36 sites for Aulacostephanus, 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

16 references

Each of the 88 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. 4 further references are not listed. 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 content2

Picture of Aulacostephanus

Credit
Hectonichus
Licence
CC BY-SA 3.0
Commercial use
the licence allows it

3D model

Source
Sketchfab
Credit
svtlille
Licence
CC Attribution
Commercial use
cannot be read from the licence given — check the record

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 itAulacostephanidae through timeFormations of the Late JurassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0.