Squaliolus

Squaliolus is a genus of deep-sea squaliform sharks in the family Dalatiidae.

Squaliolus

SEFSC Pascagoula Laboratory; Collection of Brandi Noble, NOAA/NMFS/SEFSC · 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
DalatiidaePBDB
Diet
carnivorePBDB, for Squaliformes
Life habit
nektonicPBDB, for Squaliformes
Motility
actively mobilePBDB, for Squaliformes

Time the record covers

At least 27 million years on record.

The record covers at least 41.03 Mya to 13.82 Mya. No occurrence read is dated outside 48.07 Mya to 11.63 Mya.

Eocene — about 11 of 39 occurrencesEoceneOligocene — about 0 of 39 occurrencesMiocene — about 28 of 39 occurrencesMiocene49–48 Mya — about 0.1 occurrences48–46 Mya — about 0.2 occurrences46–45 Mya — about 0.2 occurrences45–44 Mya — about 0.2 occurrences44–42 Mya — about 0.2 occurrences42–41 Mya — about 0.2 occurrences41–40 Mya — about 2 occurrences40–39 Mya — about 2 occurrences39–37 Mya — about 2 occurrences37–36 Mya — about 2 occurrences36–35 Mya — about 2 occurrences35–34 Mya — about 1 occurrence24–22 Mya — about 0.2 occurrences22–21 Mya — about 0.4 occurrences21–20 Mya — about 2 occurrences20–18 Mya — about 3 occurrences18–17 Mya — about 3 occurrences17–16 Mya — about 3 occurrences16–15 Mya — about 9 occurrences15–13 Mya — about 6 occurrences13–12 Mya — about 0.6 occurrences12–11 Mya — about 0.2 occurrences41.03 Mya13.82 Mya48.8 Mya10.9 Mya

39 occurrences of Squaliolus on record, most of them in the Miocene. 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

39 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

9 formations

Laksarska Nova Ves — 48.59°N, 17.38°EMarnes de Miretrain — 43.69°N, 1.13°WSign — 18.48°N, 77.58°WBissex Hill — 13.22°N, 59.55°WMount Hillaby — 13.19°N, 59.47°WBath — 13.18°N, 59.47°WCodrington College — 13.18°N, 59.47°WJoe's River — 13.22°N, 59.55°WMakino — 34.75°N, 136.27°E

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The named rock units Squaliolus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 18 occurrences have no formation on record, which is common for older literature.

Squaliolus and its relatives

Miocene

Where Squaliolus and its relatives were recorded in the Miocene.

Found in the same rock

179 taxa

The Paleobiology Database records 33 sites for Squaliolus, 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

9 references

Each of the 39 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 Squaliolus

Credit
SEFSC Pascagoula Laboratory; Collection of Brandi Noble, NOAA/NMFS/SEFSC
Licence
Public Domain
Commercial use
the licence allows it

No 3D scan of Squaliolus was found in Sketchfab.

Smithsonian Open Access and MorphoSource were 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 itDalatiidae through timeFormations of the MioceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Smith and Radcliffe 1912