Discover 12 Dinosaurs That Start With U

While U may not be the most popular letter of the dinosaur alphabet, there are still a good dozen dinosaurs whose names start with the 21st letter. Read on to meet them all!

1. Uberabatitan

Pronunciation: oo-ber-ah-bah-ty-tan
Name means: “Uberaba Titan”

Uberabatitan is a genus of titanosaurian sauropod dinosaur from the Maastrichtian age of the Late Cretaceous period. Researchers named the type species Uberabatitan ribeiroi in 2008 from fossils found in the Marilla Formation in Uberara, Minas Gerais, Brazil. It was a long-necked quadruped herbivore that could grow up to 26 m (85.3 ft) long.

2. Udanoceratops

Pronunciation: oo-dahn-oh-seh-rah-tops
Name means: “Udan horned face”

Udanoceratops is a genus of leptoceratopsid ceratopsian dinosaur from the Campanian age of the Late Cretaceous period. Researchers named the type species Udanoceratops tschizhovi in 1992 from fossils found in the Djadokhta Formation in Mongolia. It was a quadruped herbivore that could grow to nearly 4 m (13.1 ft) long and weigh up to 700 kg (1,543 lbs).

3. Ultrasaurus

Pronunciation: ul-trah-sor-us
Name means: “ultra lizard”

Ultrasaurus is a genus of sauropod dinosaur from the Aptian and Albian ages of the Late Cretaceous period. The type species Ultrasaurus tabriensis was named in 1983 from fossils found in the Gugyedong Formation in South Korea. Despite the name, its actual size has not yet been determined.

4. Ulughbegsaurus

Pronunciation: oo-lugh-beg-sor-us
Name means: “Ulugh Beg’s Lizard”

Ulughbegsaurus is a genus of theropod dinosaur from the Turonian age of the Late Cretaceous period. Researchers named the type species Ulughbegsaurus uzbekistanensis in 2021 from fossils found in the Bissekty Formation in Uzbekistan. It was a bipedal carnivore that could grow up to 7.5 – 8 m (24.6 – 26.2 ft) long and weigh over 1,000 kg (2,205 lbs).

5. Unaysaurus

Pronunciation: oo-nay-sor-us
Name means: “black water lizard”

Unaysaurus is a genus of unaysaurid sauropodomorph dinosaur from the Late Triassic period. Researchers named the type species Unaysaurus tolentinoi in 2004 from fossils found in the Caturrita Formation in Paleorrota Geopark, Brazil in 1998. It was a bipedal herbivore that could grow up to 4.5 m (14.8 ft) long and weigh up to 1000 kg (2205 lbs). It is one of the oldest dinosaurs known.

6. Unenlagia

Pronunciation: oo-nen-lahg-ee-ah
Name means: “half-bird”

Unenlagia is a genus of dromaeosaurid theropod dinosaur from the Turonian to Coniacian ages of the Late Cretaceous period. Researchers named the type species Unenlagia comahuensis in 2004 from fossils found in Sierra del Portezuelo, Comahue, Argentina. It was a feathered bipedal carnivore that may have grown up to between 2.0 – 3.5 m (6.6 – 11.5 ft) long.

7. Unescoceratops

Pronunciation: yoo-ness-koh-seh-rah-tops
Name means: “UNESCO’s ceratopsian”

Unescoceratops is a genus of leptoceratopsid ceratopsian dinosaur from Campanian age of the Late Cretaceous period. Researchers named the type species Unescoceratops koppelhusae in 2012 from fossils found in the ‬Dinosaur Park Formation in Alberta, Canada. It was a quadruped herbivore that grew up to between 1 -2 m (3.3 – 6.6 ft) long.

8. Unquillosaurus

Pronunciation: un-kwil-lo-sor-us
Name means: “Unquillo River lizard”

Unquillosaurus is a genus of maniraptoran theropod dinosaur from the Campanian age of the Late Cretaceous period. Researchers named the type species Unquillosaurus ceibalii in 1979 from fossils found in the Los Blanquitos Formation in Salta Province, Argentina. It was a feathered bipedal carnivore that may have grown to 2 – 3 meters (6.6 – 9.8 ft) long.

9. Urbacodon

Pronunciation: ur-bak-oh-don
Name means: “URBAC tooth”

Urbacodon is a genus of troodontid theropod dinosaur from the Cenomanian to Turonian ages of the Late Cretaceous Period. Researchers named the type species Urbacodon itemirensis in 2007 from fossils found in the Dzharakuduk Formation in Itemir, Uzbekistan. It was a small bipedal carnivore. The URBAC acronym honors the Uzbek, Russian, British, American, and Canadian scientists who contributed to its discovery.

10. Utahceratops

Pronunciation: yoo-tah-seh-rah-tops
Name means: “Utah horned face”

Utahceratops is a genus of ceratopsian dinosaur from the Campanian age of the Late Cretaceous period. Researchers named the type species Utahceratops gettyi in 2010 from fossils found in the Kaiparowits Formation in Utah. Utahceratops was a robust quadrupedal herbivore that could grow up to 4.5 – 5 m (14.8 – 16.4 ft) long and weigh up to 2000 kg (4409 lbs).

11. Utahraptor

Pronunciation: yoo-tah-rap-tor
Name means: “Utah plunderer”

Utahraptor is a genus of large dromaeosaurid theropod dinosaur that lived during the Barremian age of the Early Cretaceous period. Researchers named the type species Utahraptor ostrommaysi in 1993 from fossils found in the Cedar Mountain Formation in Utah. Utahraptor was a feathered bipedal carnivore that may have grown up to 7 m (23.0 ft) long.

12. Uteodon

Pronunciation: yoot-o-don
Name means: “Ute tooth”

Uteodon is a genus of iguanodontian dinosaur from the Tithonian age of the Late Jurassic period. Researchers named the type species Utedon aphanoecetes in 2011 from fossils found in the Morrison Formation in Uintah County, Utah. It was a quadrupedal herbivore that may have grown as long as 6 m (19.7 ft) long and weighed up to 400 kg (882 lbs), although most specimens found have been closer to 2.5 meters (8.2 ft) long.

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