Uruguaysuchus aznarezi
Uruguaysuchus is an extinct genus of crocodyliforms from the Late Cretaceous Guichón Formation of Uruguay. It was related to Simosuchus and Malawisuchus. It was of small to moderate size reaching an estimated length of 120 centimetres (3.9 ft).

Nobu Tamura ( http://spinops.blogspot.com )] · CC BY 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
- UruguaysuchusPBDB
- Diet
- carnivorePBDB, for Pseudosuchia
- Motility
- actively mobilePBDB, for Osteichthyes
- Environment
- marinePBDB, for Mesoeucrocodylia
Time the record covers
At most 17 million years on record.
Every occurrence read is dated to somewhere between 100.5 Mya and 83.6 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.
2 occurrences of Uruguaysuchus aznarezi on record, most of them in the Late Cretaceous. 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
2 occurrences- Late Cretaceous100%
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
1 formation
- Guichón Formation · Paysandú Group2
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The named rock units Uruguaysuchus aznarezi has been recovered from, largest first. Drawn where the rock is now, not where it formed.
Uruguaysuchus aznarezi and its relatives
Late CretaceousWhere Uruguaysuchus aznarezi and its relatives were recorded in the Late Cretaceous.
Found in the same rock
2 taxa- Iguanodontia1 site
- Theropoda1 site
The Paleobiology Database records 1 site for Uruguaysuchus aznarezi, and this reads all of them. The number is how many of those sites it was catalogued from too.
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
1 referenceEach of the 2 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. Each entry links to the Paleobiology Database's own record for the work.
Media and terms
Media content1
Picture of Uruguaysuchus aznarezi
- Source
- Wikipedia/Commons
- Credit
- Nobu Tamura ( http://spinops.blogspot.com )]
- Licence
- CC BY 3.0
- Commercial use
- the licence allows it
No 3D scan of Uruguaysuchus aznarezi 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 itUruguaysuchus through timeFormations of the Late CretaceousThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Rusconi 1933