science

Prosalirus

Prosalirus is a science 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 Prosalirus rather than just read about it. In short: Prosalirus is an extinct genus of primitive frog known from the Early Jurassic of North America. It contains a single species, P. bitis, known from the Kayenta Formation of Arizona.

Key takeaways

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

Reference excerpt

Prosalirus is an extinct genus of primitive frog known from the Early Jurassic of North America. It contains a single species, P. bitis, known from the Kayenta Formation of Arizona.

Description The fossils of P. bitis were discovered in 1981 by Farish Jenkins, who noted their distinctive hind legs for jumping. Only three skeletons were discovered. Jenkins would describe the species in 1995 alongside Neil Shubin. The genus name derives from prosalire, Latin for "leap forward", while bitis derives from the Navajo word for "high above it". The skeleton has primitive features, but has mostly lost the salamander-like traits of its ancestors. It has a skeleton designed to absorb the force of jumping with its hind legs and tail. It also has long hip bones, long hind leg bones, and long ankle bones, all similar to modern frogs, and is as of 2009 the earliest true frog. It is thought to have lived during the Early Jurassic epoch 190 million years ago, well before the first known modern frog, Callobatrachus.

Habitat The Prosalirus is believed to have lived in brackish, freshwater, and terrestrial environments.

References

Illustrations

Worked examples

Example 1 — a first encounter with Prosalirus

Start with the simplest possible case. Write down what Prosalirus claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, 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 Prosalirus 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 Prosalirus 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 Prosalirus

In research: Prosalirus appears in science 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 Prosalirus 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: Prosalirus is common in secondary-school and first-year university syllabi. It links to neighbouring topics Early Jurassic amphibians, Early Jurassic animals of North America, Early Jurassic extinctions, so understanding it makes those chapters shorter.
In everyday life: Look for Prosalirus 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 Prosalirus in 20 minutes

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

Frequently asked questions

What is Prosalirus in simple terms?

Prosalirus is an extinct genus of primitive frog known from the Early Jurassic of North America. It contains a single species, P. bitis, known from the Kayenta Formation of Arizona.

Why does Prosalirus matter?

Because it connects several science 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 Prosalirus?

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 Prosalirus.