Basilissa

Basilissa is a genus of extremely small deep water sea snails. They are marine gastropod mollusks in the family Seguenziidae.

Basilissa

G.W. Tryon · 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
SeguenziidaePBDB
Diet
grazerPBDB, for Seguenziidae
Life habit
epifaunalPBDB, for Seguenziidae
Motility
actively mobilePBDB, for Seguenziidae
Vision
limitedPBDB, for Gastropoda

Time the record covers

At least 71 million years on record.

The record covers at least 85.7 Mya to 13.82 Mya. No occurrence read is dated outside 89.8 Mya to 11.63 Mya.

Late Cretaceous — about 1 of 4 occurrencesLate CretaceousPaleocene — about 2 of 4 occurrencesPaleoceneEocene — about 0 of 4 occurrencesOligocene — about 0 of 4 occurrencesMiocene — about 1 of 4 occurrencesMiocene91–89 Mya — about 0.3 occurrences89–86 Mya — about 0.7 occurrences86–83 Mya — about 0.1 occurrences67–64 Mya — about 0.4 occurrences64–62 Mya — about 0.6 occurrences62–59 Mya — about 0.1 occurrences59–56 Mya — about 0.8 occurrences56–53 Mya — about 0.0 occurrences15–13 Mya — about 0.5 occurrences13–10 Mya — about 0.5 occurrences85.7 Mya13.82 Mya91 Mya10 Mya

4 occurrences of Basilissa on record, most of them in the Paleocene. 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

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

4 formations

Agatdal — 70.58°N, 53.10°WBabica Beds — 49.92°N, 21.90°EValiente — 9.21°N, 82.11°WMungo River — 4.44°N, 9.49°E

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The named rock units Basilissa has been recovered from, largest first. Drawn where the rock is now, not where it formed.

Basilissa and its relatives

Paleocene

Where Basilissa and its relatives were recorded in the Paleocene.

Found in the same rock

291 taxa

The Paleobiology Database records 3 sites for Basilissa, 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

4 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. 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 Basilissa

Credit
G.W. Tryon
Licence
Public Domain
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 itSeguenziidae through timeFormations of the PaleoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Watson 1879