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Unaysaurus tolentinoi

Unaysaurus is the first prosauropod dinosaur discovered in Brazil. The holotype (4FSM 11069) of Unaysaurus was found in the Caturrita Formation in Brazil. It was unearthed in Carnian-Norian strata and dates to around 225 million years ago. Unaysaurus had a length of about 2.5 m. (8.2 feet). Its height was 70-80 cm.. (2-3 feet). This dinosaur shows affinities to Plateosaurus and may belong in the family Plateosauridae.


Unaysaurus tolentinoi



Leal, Azevodo, Kellner and da Rosa, 2004.


Meaning of the generic name

"Black Water" in the local Tupi language





Meaning of the specific name


Named after Tolentino Marafiga, who discovered the fossils by the side of a road in 1998




Body Length: 8.2 ft (2.5 m)



Holotype 4FSM 11069: a partial (semi articulated) skeleton with almost complete skull and lower jaw.


Age and Distribution

Horizon: Caturrita Formation, Late Triassic Period (Carnian - Norian)


Locality: Rio Grande do Sul, near the city of Santa Maria, Southern Brazil



Dinosauria Saurischia Sauropodamorpha Prosauropoda ?Plateosauridae



Further Reading


Luciano A. Leal, Sergio A. K. Azevodo, Alexander W. A. Kellner, and Átila A. S. da Rosa. 2004. "A new early dinosaur (Sauropodomorpha) from the Caturrita Formation (Late Triassic), Paraná Basin, Brazil". Zootaxa 690: 1–24.