biology

Rondon's marmoset

Rondon's marmoset 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 Rondon's marmoset rather than just read about it. In short: Rondon's marmoset (Mico rondoni), also known as the Rondônia marmoset, is a small species of monkey from the family Callitrichidae found in the south-western Amazon in Brazil. It is endemic to the state of Rondônia, and its range bordered by the Rio Mamoré, Rio Madeira, Rio Ji-Paraná, Serra dos Pacaás Novos and possibly Bolivia.

Key takeaways

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

Reference excerpt

Rondon's marmoset (Mico rondoni), also known as the Rondônia marmoset, is a small species of monkey from the family Callitrichidae found in the south-western Amazon in Brazil. It is endemic to the state of Rondônia, and its range bordered by the Rio Mamoré, Rio Madeira, Rio Ji-Paraná, Serra dos Pacaás Novos and possibly Bolivia. It was only described in 2010, and its name refers to the famous Amazonian explorer Cândido Rondon. Prior to its description, it was included in Emilia's marmoset (Mico emiliae).

Rondon's marmoset is a member of the silvery marmoset (Mico argentatus) group within the genus Mico. Like others in its group, its pelage is generally silvery-gray. It has dark fur on much of its head, forehead and the sides of its face, which contrasts with a whitish patch in the middle of its forehead. The fur on its legs become reddish-brown on its shins and almost black at the ankles. Its tail is mostly black. It averages about 330 grams (12 oz) in weight. Length excluding tail averages about 22 centimetres (8.7 in) and the tail averages about 31 centimetres (12 in). Exudates are an important part of Rondon's marmoset's diet, and like other marmosets its digestive tract is specially adapted for this purpose. Adaptations include chisel-like lower incisors, which can gouge gum-producing trees to begin a flow of exudate, and an enlarged cecum, which helps digest the exudates. Despite being able to tolerate habitat disturbance, Rondon's marmoset may be the most threatened species in the genus Mico. It is considered vulnerable by the IUCN, though it has been suggested that data deficient would be more appropriate. Another callitrichid, Weddell's saddleback tamarin (Leontocebus weddelli) also occurs over much of Rondon's marmoset's range. However, Rondon's marmoset is rare or absent from areas where Weddell's saddleback tamarin is common. Weddell's saddleback tamarin is known to take over Rondon's marmoset's gum feeding sites.

References

Illustrations

Worked examples

Example 1 — a first encounter with Rondon's marmoset

Start with the simplest possible case. Write down what Rondon's marmoset 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 Rondon's marmoset 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 Rondon's marmoset 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 Rondon's marmoset

In research: Rondon's marmoset 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 Rondon's marmoset 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: Rondon's marmoset is common in secondary-school and first-year university syllabi. It links to neighbouring topics Arboreal mammals, Endemic mammals of Brazil, IUCN Red List vulnerable species, so understanding it makes those chapters shorter.
In everyday life: Look for Rondon's marmoset 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 Rondon's marmoset in 20 minutes

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

Frequently asked questions

What is Rondon's marmoset in simple terms?

Why does Rondon's marmoset 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 Rondon's marmoset?

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 Rondon's marmoset.