science

Pthirus gorillae

Pthirus gorillae 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 Pthirus gorillae rather than just read about it. In short: Pthirus gorillae or gorilla louse is a species of parasitic sucking louse that afflicts gorillas. It is found in the African continent, specifically in Rwanda and Democratic Republic of the Congo.

Key takeaways

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

Reference excerpt

Pthirus gorillae or gorilla louse is a species of parasitic sucking louse that afflicts gorillas. It is found in the African continent, specifically in Rwanda and Democratic Republic of the Congo. P. gorillae and P. pubis (the crab louse) are the only known species that belong to the genus Pthirus, often incorrectly spelled as Phthirus (the Greek word for louse is phthir). It is suggested that it is transmitted among its hosts by social grooming, shared bedding and sexual contact. All species of sucking lice feed on blood. They live in close association with their hosts and complete their entire life cycle on the host. Pthirus gorillae infests the same parts of the bodies of gorillas as Pthirus pubis does in humans, but since the gorilla is hairier, the lice tend to range over the whole body. The two also resemble each other with the exception that Pthirus gorillae has large eyes that are placed on large lateral protuberances. A short and broad sucking louse, it is about 2.20 mm long with sprawling legs and not more than 20 small abdominal setae. It was first identified from specimens of mountain gorillas in 1927 by Henry Ellsworth Ewing during a game-hunting trip in what is now the Democratic Republic of the Congo. Molecular phylogenetics suggest that P. gorillae jumped from gorillas to early humans 3.3 million years ago and diverged into the present-day pubic louse. Researchers theorize that humans acquired the parasite while butchering or scavenging on gorilla carcasses, or sleeping in the abandoned sleeping nests of gorillas. Several lice of the species were found during a necropsy in the stomach of a female gorilla from Bwindi Impenetrable National Park; she had presumably been grooming before she died. The conservation status of this species is unknown. Since its host species is critically endangered, it is likely that this species is endangered too.

References

External links Apes, lice and prehistory by Robin A Weiss Genetic Analysis of Lice Supports Direct Contact between Modern and Archaic Humans Archived 2014-12-23 at the Wayback Machine by David L. Reed et al.

Illustrations

Worked examples

Example 1 — a first encounter with Pthirus gorillae

Start with the simplest possible case. Write down what Pthirus gorillae 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 Pthirus gorillae 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 Pthirus gorillae 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 Pthirus gorillae

In research: Pthirus gorillae 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 Pthirus gorillae 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: Pthirus gorillae is common in secondary-school and first-year university syllabi. It links to neighbouring topics Insects described in 1927, Insects of Africa, Lice, so understanding it makes those chapters shorter.
In everyday life: Look for Pthirus gorillae 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 Pthirus gorillae in 20 minutes

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

Frequently asked questions

What is Pthirus gorillae in simple terms?

Pthirus gorillae or gorilla louse is a species of parasitic sucking louse that afflicts gorillas. It is found in the African continent, specifically in Rwanda and Democratic Republic of the Congo.

Why does Pthirus gorillae 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 Pthirus gorillae?

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 Pthirus gorillae.