Dorsetensia

Searched as Dorsetensia ex gr. romani romani. The Paleobiology Database treats Dorsetensia as the accepted name.

Dorsetensia is a narrowly coiled discoidal ammonite from the early Middle Jurassic, lower Bajocian, belonging to the family Sonniniidae of the superfamily Hildoceratoidea. The inner whorls are ribbed or smooth, outer whorl is smooth. The outer rim (venter) is narrow, with a keel running along the middle. The umbilicus, the opening in the middle of the shell exposing inner whorls, is of moderate size with a sharp, sometimes undercut edge.

Dorsetensia

via iDigBio · CC BY · 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
WitchelliinaePBDB
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 2.3 million years on record.

The one occurrence read is dated to somewhere between 170.9 Mya and 168.6 Mya, which is a dating window rather than a span.

Middle Jurassic — about 1 of 1 occurrenceMiddle Jurassic171–171 Mya — about 0.0 occurrences171–171 Mya — about 0.0 occurrences171–171 Mya — about 0.0 occurrences171–171 Mya — about 0.0 occurrences171–170 Mya — about 0.0 occurrences170–170 Mya — about 0.0 occurrences170–170 Mya — about 0.0 occurrences170–170 Mya — about 0.0 occurrences170–170 Mya — about 0.0 occurrences170–170 Mya — about 0.0 occurrences170–170 Mya — about 0.0 occurrences170–170 Mya — about 0.0 occurrences170–170 Mya — about 0.0 occurrences170–169 Mya — about 0.0 occurrences169–169 Mya — about 0.0 occurrences169–169 Mya — about 0.0 occurrences169–169 Mya — about 0.0 occurrences169–169 Mya — about 0.0 occurrences169–169 Mya — about 0.0 occurrences169–169 Mya — about 0.0 occurrences169–169 Mya — about 0.0 occurrences169–169 Mya — about 0.0 occurrences171.4 Mya168.1 Mya

1 occurrence of Dorsetensia 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

1 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.

Dorsetensia and its relatives

Middle Jurassic

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

Found in the same rock

80 taxa

The Paleobiology Database records 19 sites for Dorsetensia, 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

1 reference

Each of the 1 occurrence 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 content1

Picture of Dorsetensia

Source
iDigBio
Credit
via iDigBio
Licence
CC BY
Commercial use
the licence allows it

No 3D scan of Dorsetensia was found in MorphoSource and Sketchfab.

Smithsonian Open Access was 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 itWitchelliinae through timeFormations of the Middle JurassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0.