biology

Sacisaurus

Sacisaurus 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 Sacisaurus rather than just read about it. In short: Sacisaurus ("Saci lizard") is a silesaurid dinosauriform from the Late Triassic (Norian) Caturrita Formation of southern Brazil. The scientific name, Sacisaurus agudoensis, refers to the city where the species was found, Agudo in the Rio Grande do Sul state, whereas Sacisaurus refers to Saci, a famous one-legged creature from Brazilian mythology, because among the dozens of fossil material unearthed, 35 right femora…

Key takeaways

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

Reference excerpt

Sacisaurus ("Saci lizard") is a silesaurid dinosauriform from the Late Triassic (Norian) Caturrita Formation of southern Brazil. The scientific name, Sacisaurus agudoensis, refers to the city where the species was found, Agudo in the Rio Grande do Sul state, whereas Sacisaurus refers to Saci, a famous one-legged creature from Brazilian mythology, because among the dozens of fossil material unearthed, 35 right femora were collected whereas only 1 left femur was found.

Characteristics

Sacisaurus was approximately 1.1 metres (3.6 ft) long and 35 centimetres (1.15 ft) high, based on the largest femoral specimen. Some elements that were originally mentioned in the description study were reassigned to other taxa afterwards. Its long and strong legs indicate that it was a fast animal. The biggest teeth of the genus were just 3 millimetres (0.12 in) long.

The well-preserved jaw indicates that Sacisaurus was an herbivore, and there is a process at the tip that resembles the ornithischian predentary bone. Further research attempted to define if Sacisaurus was the oldest ornithischian dinosaur. In 2011, a cladistic analysis of some of its morphological particularities found that its closest relative was the silesaurid Diodorus, from Morocco.

History Sacisaurus was discovered in 2001 in the small municipality of Agudo, in the countryside of Rio Grande do Sul state. With 50 bones, scientists led by paleontologist Jorge Ferigolo assembled the skeleton and speculated on how the animal might have lived. The fossil was presented for the first time in the 2nd Latin American Congress of Vertebrate Paleontology in 2005. . After the work of Brazilian scientists, the announcement of the discovery of the new species was made on November 1, 2006 at the University of São Paulo, Ribeirão Preto, where the bones were identified and the paper was published in the British scientific journal Historical Biology: A Journal of Paleobiology on October 30, 2006. The discovery helped scientists to study the feeding habits of dinosaurs and their close relatives, since it is one of the oldest ever found.

References

External links (in Portuguese) Folha online - Brasil "ganha" dinossauro de 220 milhões de anos

Illustrations

Worked examples

Example 1 — a first encounter with Sacisaurus

Start with the simplest possible case. Write down what Sacisaurus 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 Sacisaurus 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 Sacisaurus 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 Sacisaurus

In research: Sacisaurus 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 Sacisaurus 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: Sacisaurus is common in secondary-school and first-year university syllabi. It links to neighbouring topics Fossil taxa described in 2006, Norian reptiles, Reptile genera, so understanding it makes those chapters shorter.
In everyday life: Look for Sacisaurus 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 Sacisaurus in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Sacisaurus 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 Sacisaurus out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Sacisaurus in simple terms?

Why does Sacisaurus 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 Sacisaurus?

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 Sacisaurus.