science

Xenotrichini

Xenotrichini 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 Xenotrichini rather than just read about it. In short: Xenotrichini (the Antilles monkeys) is a tribe of extinct primates, which lived on the Greater Antilles as recently as the last few thousand years. These Caribbean islands no longer contain endemic primates; Xenothrix mcgregori, the species currently documented to have survived the latest, is estimated to have gone extinct around 900 years before present.

Key takeaways

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

Reference excerpt

Xenotrichini (the Antilles monkeys) is a tribe of extinct primates, which lived on the Greater Antilles as recently as the last few thousand years. These Caribbean islands no longer contain endemic primates; Xenothrix mcgregori, the species currently documented to have survived the latest, is estimated to have gone extinct around 900 years before present. The relationship of these species is supported by details in the formation of the skull and the lower jaw, such as a reduction in the number of teeth.

Taxonomy The exact timing and causes of extinction are not well-known and their relationship and placement in the parvorder of the New World monkeys is unsure. Originally they were thought to be closely related to the night monkeys, but more recent research has instead allied them with the titi monkeys. A 2018 DNA study of the Jamaican monkey suggested that it diverged from its closest relative Cheracebus around 11 Ma, during the Late Miocene, which is younger than the 18 Ma Paralouatta from Cuba, meaning that the Jamaican monkey has a separate origin from the rest of the Antillean monkeys, making the group polyphyletic. The Cuban monkeys (Paralouatta varonai and P. marianae) of Cuba were originally thought to be in the tribe, but more recent research shows a closer relationship with Alouatta, the howler monkeys.

Species So far, three species of Xenotrichini are known:

The Jamaican monkey (Xenothrix mcgregori), from Jamaica. The Hispaniola monkey (Antillothrix bernensis), from Hispaniola. Insulacebus toussaintiana, also from Hispaniola.

References

Worked examples

Example 1 — a first encounter with Xenotrichini

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

In research: Xenotrichini 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 Xenotrichini 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: Xenotrichini is common in secondary-school and first-year university syllabi. It links to neighbouring topics Extinct animals of the Caribbean, Extinct primates, Fauna of the Greater Antilles, so understanding it makes those chapters shorter.
In everyday life: Look for Xenotrichini 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 Xenotrichini in 20 minutes

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

Frequently asked questions

What is Xenotrichini in simple terms?

Why does Xenotrichini 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 Xenotrichini?

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 Xenotrichini.