Obornella

Obornella is a genus of fossil sea snails, marine gastropod mollusks in the family Pleurotomariidae, the slit snails,.

Obornella

H. Zell · 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
PleurotomariidaePBDB
Diet
carnivorePBDB, for Pleurotomariidae
Life habit
epifaunalPBDB, for Pleurotomariidae
Motility
actively mobilePBDB, for Pleurotomariidae
Vision
limitedPBDB, for Gastropoda

Time the record covers

At least 10 million years on record.

The record covers at least 168.6 Mya to 157.9 Mya. No occurrence read is dated outside 170.9 Mya to 154.8 Mya.

Middle Jurassic — about 13 of 20 occurrencesMiddle JurassicLate Jurassic — about 7 of 20 occurrencesLate Jurassic171–171 Mya — about 0.2 occurrences171–170 Mya — about 2 occurrences170–170 Mya — about 2 occurrences170–169 Mya — about 2 occurrences169–169 Mya — about 2 occurrences169–168 Mya — about 0.8 occurrences168–167 Mya — about 0.8 occurrences167–167 Mya — about 0.8 occurrences167–166 Mya — about 0.8 occurrences166–166 Mya — about 0.8 occurrences166–165 Mya — about 0.6 occurrences165–165 Mya — about 0.1 occurrences165–164 Mya — about 0.1 occurrences164–163 Mya — about 0.1 occurrences163–163 Mya — about 0.1 occurrences163–162 Mya — about 0.1 occurrences162–162 Mya — about 0.1 occurrences162–161 Mya — about 0.4 occurrences161–161 Mya — about 0.6 occurrences161–160 Mya — about 0.6 occurrences160–159 Mya — about 0.6 occurrences159–159 Mya — about 0.5 occurrences159–158 Mya — about 0.3 occurrences158–158 Mya — about 0.5 occurrences158–157 Mya — about 0.7 occurrences157–157 Mya — about 0.7 occurrences157–156 Mya — about 0.7 occurrences156–155 Mya — about 0.7 occurrences155–155 Mya — about 0.7 occurrences155–154 Mya — about 0.1 occurrences168.6 Mya157.9 Mya171.4 Mya154.3 Mya

20 occurrences of Obornella on record, most of them in the Middle Jurassic. The Paleobiology Database records this as a living group, and the chart stops with its fossils rather than at the present. 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

20 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

Trigonia clavellata — 50.80°N, 2.28°WDhruma — 22.62°N, 46.00°EDhruma — 22.53°N, 46.17°ECoral Rag de Trouville — 49.32°N, 0.03°EOsmington Oolite — 50.80°N, 2.28°WLower Calcareous Grit — 54.21°N, 0.29°WPatcham — 23.52°N, 69.00°EChari — 23.67°N, 69.00°E

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The named rock units Obornella has been recovered from, largest first. Drawn where the rock is now, not where it formed. 10 occurrences have no formation on record, which is common for older literature.

Obornella and its relatives

Middle Jurassic

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

Found in the same rock

201 taxa

The Paleobiology Database records 15 sites for Obornella, 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

7 references

Each of the 20 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 Obornella

Credit
H. Zell
Licence
CC BY-SA 3.0
Commercial use
the licence allows it

No 3D scan of Obornella 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 itPleurotomariidae through timeFormations of the Middle JurassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Cox 1959