Androgynoceras

Androgynoceras is an extinct genus of cephalopod belonging to the ammonite subclass. The Green Ammonite Beds of the Dorset Coast are named after Androgynoceras lataecosta which has chambers filled with green calcite.

Androgynoceras

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
LiparoceratidaePBDB
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 8.7 million years on record.

Every occurrence read is dated to somewhere between 192.9 Mya and 184.2 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Early Jurassic — about 66 of 66 occurrencesEarly Jurassic193–193 Mya — about 1 occurrence193–192 Mya — about 2 occurrences192–192 Mya — about 2 occurrences192–192 Mya — about 2 occurrences192–191 Mya — about 2 occurrences191–191 Mya — about 2 occurrences191–191 Mya — about 2 occurrences191–190 Mya — about 2 occurrences190–190 Mya — about 2 occurrences190–190 Mya — about 2 occurrences190–190 Mya — about 2 occurrences190–189 Mya — about 2 occurrences189–189 Mya — about 2 occurrences189–189 Mya — about 2 occurrences189–188 Mya — about 2 occurrences188–188 Mya — about 2 occurrences188–188 Mya — about 2 occurrences188–187 Mya — about 2 occurrences187–187 Mya — about 2 occurrences187–187 Mya — about 2 occurrences187–186 Mya — about 2 occurrences186–186 Mya — about 2 occurrences186–186 Mya — about 2 occurrences186–185 Mya — about 2 occurrences185–185 Mya — about 2 occurrences185–185 Mya — about 2 occurrences185–184 Mya — about 2 occurrences184–184 Mya — about 1 occurrence193.4 Mya183.7 Mya

66 occurrences of Androgynoceras on record, most of them in the Early 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

66 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

5 formations

Almonacid de la Cuba — 41.29°N, 0.79°WLower Lias — 51.80°N, 1.88°WAdnet — 47.46°N, 13.56°ECharmouth Mudstone — 50.72°N, 2.83°WScalpa Sandstone — 57.38°N, 6.00°W

Loading coastlines…

The named rock units Androgynoceras has been recovered from, largest first. Drawn where the rock is now, not where it formed. 55 occurrences have no formation on record, which is common for older literature.

Androgynoceras and its relatives

Early Jurassic

Where Androgynoceras and its relatives were recorded in the Early Jurassic.

Found in the same rock

197 taxa

The Paleobiology Database records 54 sites for Androgynoceras, 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

13 references

Each of the 66 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. 1 further reference is 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 content1

Picture of Androgynoceras

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

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 itLiparoceratidae through timeFormations of the Early JurassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Hyatt 1867