biology

Olrog's four-eyed opossum

Olrog's four-eyed opossum 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 Olrog's four-eyed opossum rather than just read about it. In short: Olrog's four-eyed opossum (Philander olrogi) is a South American species of opossum endemic to eastern Bolivia, first described in 2008 based on specimens collected in 1974. It inhabits the lowland Amazon rainforest, with an elevation range of 150 to 250 m.

Key takeaways

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

Reference excerpt

Olrog's four-eyed opossum (Philander olrogi) is a South American species of opossum endemic to eastern Bolivia, first described in 2008 based on specimens collected in 1974. It inhabits the lowland Amazon rainforest, with an elevation range of 150 to 250 m. The species is named after Swedish-Argentine biologist Claes C. Olrog. It is sympatric with P. opossum, which it resembles. The two species differ in several ways, such as ventral fur color and condition of the zygomatic arch. It is considered to be a junior synonym of the common four-eyed opossum by some sources, such as the Mammal Diversity Database.

References

Illustrations

Worked examples

Example 1 — a first encounter with Olrog's four-eyed opossum

Start with the simplest possible case. Write down what Olrog's four-eyed opossum 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 Olrog's four-eyed opossum 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 Olrog's four-eyed opossum 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 Olrog's four-eyed opossum

In research: Olrog's four-eyed opossum 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 Olrog's four-eyed opossum 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: Olrog's four-eyed opossum is common in secondary-school and first-year university syllabi. It links to neighbouring topics Endemic fauna of Bolivia, Fauna of the Amazon, IUCN Red List data deficient species, so understanding it makes those chapters shorter.
In everyday life: Look for Olrog's four-eyed opossum 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 Olrog's four-eyed opossum in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Olrog's four-eyed opossum 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 Olrog's four-eyed opossum out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Olrog's four-eyed opossum in simple terms?

Why does Olrog's four-eyed opossum 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 Olrog's four-eyed opossum?

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 Olrog's four-eyed opossum.