Kartu dino No. 1555 ci 2 027

Riojasaurus

Tur bi mooy: “lizard from La Rioja”1

Lekkoon: GàncaxBaat yu guddTriyaas bu mujj

Riojasaurus was a huge, plant-eating dinosaur with a long neck and a heavy body. It lived during the Late Triassic period in what is now Argentina. It probably walked slowly on all four legs, munching on leaves with its leaf-shaped teeth.1

Dundoon

am na 227 ba 206 milyoŋ at4

Triyaas bu mujj

Fosil yu ñu gis ci

La Rioja Province, Argentina (Los Colorados Formation)1 2

Guddaay

6,6 ba 10 m (22 ba 33 ft)1

Diisaay

800 kg ba 3 toon (1 800 ba 6 600 lb)1

Kawewaay

5 m (16 ft)3

Gaawaay bi gën a kawe

lu tollu ci 26 km/h (16 mph)

Daw, jortu

Kañ la dundoon?

Triyaas

Jurasik

Kretase

Am na 252 milyoŋ at20114566, asteroyid bi

Naka la réyoon?

Naka la guddoon?

Naka la kawewoon?

Naka la diisoon?

diis ni 2 oto

gudd ni 2 oto yu ñu taxawal ci benn rëddgudd ni 56 banaana yu ñu topp-toppalediis ni 150 xajdiis ni 600 xaaldiis ni 4 klaas yu mat yu xale yu lekkooldiis ni 7 uurs yu weexkawe ba mën a xool ci palanteer bu nekk ci eta 2mënoon na daw 100 meetar ci 14 segond (nit ki gën a gaaw dafay soxla 9,6)

Naka la Riojasaurus réyoon, bu ñu ko méngalee ak YAW?

Ay kalkil rekk ci sa navigatëer. Dara du ñu denc, dara du ñu yónne fenn.

Naka la gaawoon?

Nit kuy dox lu tollu ci 5 km/h (3 mph)

Xale bu nekk ci welo lu tollu ci 12 km/h (7 mph)

Riojasaurus lu tollu ci 26 km/h (16 mph)

Fas buy daw bu gaaw lu tollu ci 65 km/h (40 mph)

Segg bu gaaw lu tollu ci 100 km/h (62 mph)

yëf yu neex

Xibaar yu neex

Riojasaurus had very dense and massive leg bones, making it heavy and sturdy for an early sauropodomorph.1

Unlike most early relatives, Riojasaurus had four sacral vertebrae in its hip area instead of three, which helped support its weight.1

Its neck bones were longer than those of other sauropodomorphs found in the same formation, making its neck especially long.1

The first Riojasaurus skeleton found had no skull. A well-preserved skull was later discovered in 1987 and described in 1995.1

Some scientists think Riojasaurus may have been active at short intervals throughout the day and night, based on the shape of its eye bones (scleral rings).1

Riojasaurus is the only known riojasaurid dinosaur from South America, and it may be closely related to Melanorosaurus from southern Africa.1

Its front and hind limbs were nearly the same length, which is a clue that it walked on all fours and could not rear up on its back legs.1

Nataalu Riojasaurus bu ñu def ak IA — Nataal bu IA def la, muy wone ni Riojasaurus mën a meloon, ordinatëer moo ko def ci li boroom xam-xam yi xam. Jortu kese la: rab bi ci dëgg mën na meloon neneen, te kenn xamul ay kulëëram yu dëgg.

yeen a laaj

Laaj yi ñu gën a laaj ci Riojasaurus

?How big was Riojasaurus?

Riojasaurus was about 6.6 metres (21.7 feet) long and weighed around 800 kilograms (1,764 pounds). Some large individuals may have reached 10 metres (32.8 feet) long and weighed 3 metric tons (3.3 short tons).1

?What did Riojasaurus eat?

Riojasaurus was a herbivore that ate plants. Its leaf-shaped, serrated teeth were used for grazing on soft vegetation like gymnosperms, and it may have swallowed stones (gastroliths) to help grind food in its stomach.1 3

?Could Riojasaurus walk on two legs?

No, Riojasaurus probably walked on all four legs. Its front and hind limbs were nearly the same length, and its leg bones were dense and massive, suggesting it moved slowly on all fours and could not rear up on its back legs.1

?When did Riojasaurus live?

Riojasaurus lived during the Late Triassic Period, about 225 to 213 million years ago. Its fossils have been found in the Los Colorados Formation in Argentina.1

?Is Riojasaurus a dinosaur?

Yes, Riojasaurus is a dinosaur. It is a herbivorous sauropodomorph dinosaur from the Late Triassic of Argentina.1

?Did Riojasaurus have feathers?

No, there is no evidence that Riojasaurus had feathers. Its fossils show only scales and bones, and it is not known to have any feather-like structures.1

Ngir ñi xam dino lool

Turu xam-xam: Riojasaurus
Ku ko tudde: Bonaparte 19694
Kurél: Baat yu gudd
Njaboot / klad: Riojasauridae4
Klasifikasiyoŋ: Sauropodomorpha4
Màggaayu doj yi: 227 ba 206 milyoŋ at (Norian)4
Formasiyoŋi doj: Los Colorados4
Réew yi: Arsantin4
Fosil yu ñu gis: 2 ci The Paleobiology Database4
Ñu ngi koy wooye itam: Strenusaurus (tur yu njëkk yi, léegi ñu ngi leen jàppe ni benn rab rekk)4
Gisees: Riojasaurus was named by Argentine paleontologist José Bonaparte in 1969. The first skeleton (holotype PVL 3808) was found in 1966 in the Los Colorados Formation of La Rioja, Argentina. Later, many more skeletons and a skull were discovered.1 4
Ñu ngi koy werante ba tey: Scientists disagree on whether Riojasaurus was completely quadrupedal or could sometimes walk on two legs. The hand and shoulder bones suggest it might have been able to move in different ways.1

Fa xibaar yi jóge

Riojasaurus (en.wikipedia.org)
PBDB Taxon (paleobiodb.org)
Riojasaurus | Zoology | Research Starters | EBSCOhost (ebsco.com)
Riojasaurus in The Paleobiology Database (CC BY 4.0): at, béréb yi, formasiyoŋi doj, klasifikasiyoŋ.

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