biology

Uriash

Uriash is a biology topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Uriash rather than just read about it. In short: Uriash is a genus of titanosaurian sauropod dinosaur from the Late Cretaceous (Maastrichtian) of Romania. The holotype of this genus was originally referred to Magyarosaurus hungaricus, which is now classified in a separate genus, Petrustitan.

Key takeaways

Uriash belongs to biology; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Uriash to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Uriash from memory before moving on to harder problems.

Reference excerpt

Uriash is a genus of titanosaurian sauropod dinosaur from the Late Cretaceous (Maastrichtian) of Romania. The holotype of this genus was originally referred to Magyarosaurus hungaricus, which is now classified in a separate genus, Petrustitan.

Discovery and naming In 1914, the Hungarian geologist Ottokár Kadić in the Pârâul Budurone ravine near Vălioara, discovered a skeleton of a sauropod which was markedly larger than previously found sauropod remains in the area. In 1916, the discovery, consisting of limb bones and eight vertebrae, was reported in the scientific literature. By 12 January 1927 two vertebrae had been sent to Friedrich von Huene at the University of Tübingen. Von Huene described these in 1932, preliminary referring them to a ?Magyarosaurus hungaricus, presently Petrustitan. In 2021 the site was rediscovered and only then it was realised that all the bones had belonged to a single animal, "Individual C". It was concluded that it represented a taxon new to science. In 2025, the type species Uriash kadici was named and described by Verónica Díez Díaz, Philip David Mannion, Zoltán Csiki-Sava and Paul Upchurch. The generic name Uriash references the Romanian word uriaș, the giant in Romanian Folklore, while the specific name kadici references the Hungarian geologist Ottokár Kadić (1876–1957). Individual C is the holotype. It was found in the lower middle member of the Densuş-Ciula Formation probably dating from the early Maastrichtian. It contains the tail vertebrae SZTFH Ob.3090 B, D, G, H (four vertebrae have been lost), the right humerus SZTFH Ob.3104, the thighbones SZTFH Ob.3103 and the left first metatarsal SZTFH Ob.3095.

Description

Uriash has been estimated to be 8.83–11.87 m (29.0–38.9 ft) long and weigh up to 5–8 t (4.9–7.9 long tons; 5.5–8.8 short tons). It was in 2025 the second largest known European Upper Cretaceous titanosaur, after Abditosaurus.

References

Illustrations

Worked examples

Example 1 — a first encounter with Uriash

Start with the simplest possible case. Write down what Uriash claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Uriash before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Uriash ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Uriash

In research: Uriash appears in biology research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Uriash in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Uriash is common in secondary-school and first-year university syllabi. It links to neighbouring topics Dinosaur genera, Dinosaurs of Romania, Fossil taxa described in 2025, so understanding it makes those chapters shorter.
In everyday life: Look for Uriash outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Uriash in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Uriash means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Uriash out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Uriash in simple terms?

Why does Uriash matter?

Because it connects several biology ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Uriash?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Uriash.