Tetragonolepis

Tetragonolepis is an extinct genus of bony fish belonging to the family Dapediidae that lived during the Rhaetian–Hettangian ages.

Tetragonolepis

Ghedoghedo · 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
SemionotidaePBDB
Diet
durophage, carnivorePBDB, for Semionotiformes
Life habit
nektonicPBDB, for Semionotiformes
Motility
actively mobilePBDB, for Semionotiformes

Time the record covers

At least 128 million years on record.

The record covers at least 241.464 Mya to 113.2 Mya. No occurrence read is dated outside 243.43 Mya to 110.1 Mya.

Middle Triassic — about 1 of 18 occurrencesLate Triassic — about 2 of 18 occurrencesLate TriassicEarly Jurassic — about 13 of 18 occurrencesEarly JurassicMiddle Jurassic — about 0 of 18 occurrencesMiddle JurassicLate Jurassic — about 0 of 18 occurrencesEarly Cretaceous — about 2 of 18 occurrencesEarly Cretaceous246–241 Mya — about 1.0 occurrences241–237 Mya — about 0.0 occurrences237–232 Mya — about 1.0 occurrences209–204 Mya — about 0.3 occurrences204–200 Mya — about 2 occurrences200–195 Mya — about 0.5 occurrences195–191 Mya — about 0.4 occurrences191–186 Mya — about 0.6 occurrences186–181 Mya — about 6 occurrences181–177 Mya — about 3 occurrences177–172 Mya — about 1 occurrence172–168 Mya — about 0.1 occurrences126–121 Mya — about 1 occurrence117–112 Mya — about 0.4 occurrences112–107 Mya — about 0.6 occurrences241.464 Mya113.2 Mya246 Mya107 Mya

18 occurrences of Tetragonolepis on record, most of them in the Early 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

18 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

6 formations

Marnes de Jamoigne — 49.72°N, 5.22°ECassian — 46.55°N, 11.93°EBesano — 45.89°N, 8.90°ELias — 51.40°N, 2.46°WKota — 18.92°N, 79.97°EPosidonia Shale — 52.31°N, 10.62°E

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The named rock units Tetragonolepis has been recovered from, largest first. Drawn where the rock is now, not where it formed. 12 occurrences have no formation on record, which is common for older literature.

Tetragonolepis and its relatives

Early Jurassic

Where Tetragonolepis and its relatives were recorded in the Early Jurassic.

Found in the same rock

581 taxa

The Paleobiology Database records 16 sites for Tetragonolepis, 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

8 references

Each of the 18 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 Tetragonolepis

Credit
Ghedoghedo
Licence
CC BY-SA 3.0
Commercial use
the licence allows it

No 3D scan of Tetragonolepis 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 itSemionotidae through timeFormations of the Early JurassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Bronn 1830