Keasius

Keasius is an extinct genus of basking sharks that lived during the Cenozoic. It contains four valid species, which have been found in North America, Europe, and Antarctica.

Keasius

Apokryltaros · CC BY-SA 4.0 · 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
CetorhinidaePBDB
Diet
suspension feeder, carnivorePBDB, for Cetorhinidae
Life habit
nektonicPBDB, for Cetorhinidae
Motility
fast-movingPBDB, for Cetorhinidae

Time the record covers

At least 23 million years on record.

The record covers at least 37.71 Mya to 13.82 Mya. No occurrence read is dated outside 41.03 Mya to 11.63 Mya.

Eocene — about 6 of 103 occurrencesEoceneOligocene — about 59 of 103 occurrencesOligoceneMiocene — about 38 of 103 occurrencesMiocene42–41 Mya — about 0.3 occurrences41–40 Mya — about 0.6 occurrences40–39 Mya — about 0.6 occurrences39–38 Mya — about 0.7 occurrences38–37 Mya — about 1 occurrence37–36 Mya — about 1 occurrence36–34 Mya — about 1 occurrence34–33 Mya — about 4 occurrences33–32 Mya — about 8 occurrences32–31 Mya — about 8 occurrences31–30 Mya — about 8 occurrences30–29 Mya — about 8 occurrences29–28 Mya — about 8 occurrences28–27 Mya — about 8 occurrences27–26 Mya — about 2 occurrences26–25 Mya — about 2 occurrences25–24 Mya — about 2 occurrences24–23 Mya — about 2 occurrences23–22 Mya — about 2 occurrences22–21 Mya — about 2 occurrences21–20 Mya — about 2 occurrences20–19 Mya — about 2 occurrences19–18 Mya — about 2 occurrences18–17 Mya — about 2 occurrences17–16 Mya — about 2 occurrences16–15 Mya — about 7 occurrences15–14 Mya — about 8 occurrences14–13 Mya — about 5 occurrences13–12 Mya — about 3 occurrences12–11 Mya — about 1 occurrence37.71 Mya13.82 Mya41.6 Mya11 Mya

103 occurrences of Keasius on record, most of them in the Oligocene. 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

103 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

28 formations

Boom Clay — 51.19°N, 4.32°EBoom Clay — 51.13°N, 4.26°EBoom Clay — 51.12°N, 4.35°EBoom Clay — 51.16°N, 4.13°EBreda — 51.18°N, 6.44°EBreda — 51.58°N, 6.25°EBreda — 51.81°N, 6.56°EBreda — 51.66°N, 6.45°EBerchem — 51.20°N, 4.44°EBerchem — 51.08°N, 4.73°EBerchem — 51.19°N, 4.47°EAlzey — 49.82°N, 7.82°EAlzey — 49.74°N, 8.09°EAlzey — 49.79°N, 7.91°EAlzey — 49.79°N, 7.98°EKeasey — 45.77°N, 123.24°WKeasey — 46.00°N, 123.26°WKeasey — 45.85°N, 123.19°WMenilite — 49.20°N, 17.20°EMenilite — 49.41°N, 17.75°EBoom — 51.08°N, 4.40°ELower Mica Finesand — 54.15°N, 10.52°ELower Mica Finesand — 53.92°N, 10.83°ELower Mica Finesand — 53.85°N, 10.93°ECalvert — 38.16°N, 76.83°WBodenheim — 49.98°N, 8.27°EBodenheim — 49.96°N, 7.91°EGrafenberg — 51.23°N, 6.47°EGrafenberg — 51.34°N, 6.59°EEbelsberg — 48.24°N, 13.99°ENeuhofen — 48.50°N, 14.28°EChandler Bridge — 33.03°N, 80.27°WLa Meseta — 64.23°S, 56.67°WMenelite — 49.93°N, 22.02°EMenelitic — 49.55°N, 17.67°EKuma — 45.10°N, 34.63°ESternberg — 53.67°N, 11.82°ESables de Fontainbleau — 48.59°N, 1.58°EChatt — 54.36°N, 10.88°ERatzeburg — 53.52°N, 10.56°EWerder — 52.98°N, 9.06°EBreda — 51.97°N, 6.72°E

Loading coastlines…

The named rock units Keasius has been recovered from, largest first. Drawn where the rock is now, not where it formed. 4 further formations hold fewer occurrences each and are not listed. 21 occurrences have no formation on record, which is common for older literature.

Keasius and its relatives

Oligocene

Where Keasius and its relatives were recorded in the Oligocene.

Found in the same rock

1,191 taxa

The Paleobiology Database records 101 sites for Keasius, 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

31 references

Each of the 103 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. 19 further references are 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 Keasius

Credit
Apokryltaros
Licence
CC BY-SA 4.0
Commercial use
the licence allows it

No 3D scan of Keasius 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 itCetorhinidae through timeFormations of the OligoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Welton 2013