Gyrodus

Gyrodus is an extinct genus of marine pycnodontomorph ray-finned fish that lived from the Middle Jurassic (Bajocian) to the Early Cretaceous (Aptian). It is the only member of the family Gyrodontidae.

Gyrodus

Oilshale · 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
GyrodontidaePBDB
Motility
actively mobilePBDB, for Osteichthyes

Time the record covers

At least 107 million years on record.

The record covers at least 201.4 Mya to 93.9 Mya. No occurrence read is dated outside 205.7 Mya to 89.8 Mya.

Late Triassic — about 1 of 30 occurrencesEarly Jurassic — about 0 of 30 occurrencesMiddle Jurassic — about 0 of 30 occurrencesMiddle JurassicLate Jurassic — about 15 of 30 occurrencesLate JurassicEarly Cretaceous — about 8 of 30 occurrencesEarly CretaceousLate Cretaceous — about 6 of 30 occurrencesLate Cretaceous208–204 Mya — about 0.4 occurrences204–200 Mya — about 0.6 occurrences168–164 Mya — about 0.1 occurrences164–160 Mya — about 1 occurrence160–156 Mya — about 3 occurrences156–152 Mya — about 2 occurrences152–148 Mya — about 7 occurrences148–144 Mya — about 0.7 occurrences144–140 Mya — about 0.8 occurrences140–136 Mya — about 0.3 occurrences136–132 Mya — about 0.4 occurrences132–128 Mya — about 0.6 occurrences128–124 Mya — about 0.4 occurrences124–120 Mya — about 2 occurrences120–116 Mya — about 1 occurrence116–112 Mya — about 0.9 occurrences112–108 Mya — about 0.2 occurrences108–104 Mya — about 0.5 occurrences104–100 Mya — about 0.9 occurrences100–96 Mya — about 2 occurrences96–92 Mya — about 3 occurrences92–87 Mya — about 1 occurrence201.4 Mya93.9 Mya208 Mya87 Mya

30 occurrences of Gyrodus on record, most of them in the Late 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

30 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

18 formations

Atherfield Clay — 50.62°N, 1.34°WAtherfield Clay — 50.61°N, 1.36°WTeplice — 50.40°N, 13.94°EAshville — 53.48°N, 102.24°WPainten — 48.92°N, 11.58°EBaharîje — 28.43°N, 28.92°EOxford Clay — 51.75°N, 1.18°WDouiret — 32.87°N, 10.38°EQuehita — 22.01°S, 68.89°WQuebrada — 25.98°S, 69.20°WSot de Chera — 41.12°N, 0.83°WLiegende Bankkalk — 48.12°N, 8.87°EWest Melbury Marly Chalk — 52.04°N, 0.15°WZapata — 51.14°S, 73.28°WHolleywell, New Pit, Lewes — 51.30°N, 0.39°EWoburn Sands — 52.03°N, 0.40°WSandgate — 51.24°N, 0.15°WJagua — 22.62°N, 83.71°WMiddle Chalk — 51.35°N, 0.43°W

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The named rock units Gyrodus 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.

Gyrodus and its relatives

Late Jurassic

Where Gyrodus and its relatives were recorded in the Late Jurassic.

Found in the same rock

599 taxa

The Paleobiology Database records 24 sites for Gyrodus, 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

24 references

Each of the 30 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. 12 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 Gyrodus

Credit
Oilshale
Licence
CC BY-SA 4.0
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 itGyrodontidae through timeFormations of the Late JurassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Agassiz 1833