Dyrosaurus

Dyrosaurus is a genus of extinct crocodylomorph that lived during the Early Eocene. The name Dyrosaurus comes from sauros (σαῦρος) the Greek for lizard or reptile, and Dyr for Djebel Dyr (mountain) close to where the type species was discovered. It was a large reptile with an estimated body length of 6.5 metres (21 ft).

Dyrosaurus

incidencematrix · CC BY 2.0 · 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
HyposaurinaePBDB
Diet
carnivorePBDB, for Pseudosuchia
Motility
actively mobilePBDB, for Osteichthyes
Environment
marinePBDB, for Mesoeucrocodylia

Time the record covers

At least 59 million years on record.

The record covers at least 100.5 Mya to 41.03 Mya. No occurrence read is dated outside 113.2 Mya to 33.9 Mya.

Early Cretaceous — about 1 of 11 occurrencesEarly CretaceousLate Cretaceous — about 0 of 11 occurrencesPaleocene — about 0 of 11 occurrencesEocene — about 10 of 11 occurrencesEoceneOligocene — about 0 of 11 occurrences115–112 Mya — about 0.1 occurrences112–109 Mya — about 0.2 occurrences109–107 Mya — about 0.2 occurrences107–104 Mya — about 0.2 occurrences104–101 Mya — about 0.2 occurrences101–98 Mya — about 0.0 occurrences57–54 Mya — about 2 occurrences54–52 Mya — about 3 occurrences52–49 Mya — about 3 occurrences49–46 Mya — about 0.8 occurrences43–41 Mya — about 0.1 occurrences41–38 Mya — about 0.4 occurrences38–35 Mya — about 0.4 occurrences35–32 Mya — about 0.2 occurrences100.5 Mya41.03 Mya115 Mya32 Mya

11 occurrences of Dyrosaurus on record, most of them in the Eocene. 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

11 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

2 formations

Gafsa Phosphates — 34.33°N, 8.41°EContinental Intercalaire — 29.25°N, 0.25°E

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The named rock units Dyrosaurus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 6 occurrences have no formation on record, which is common for older literature.

Dyrosaurus and its relatives

Eocene

Where Dyrosaurus and its relatives were recorded in the Eocene.

Found in the same rock

28 taxa

The Paleobiology Database records 8 sites for Dyrosaurus, 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

7 references

Each of the 11 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 Dyrosaurus

Credit
incidencematrix
Licence
CC BY 2.0
Commercial use
the licence allows it

No 3D scan of Dyrosaurus was found in MorphoSource and Sketchfab.

Smithsonian Open Access was 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 itHyposaurinae through timeFormations of the EoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Pomel 1894