biology

Phrynops williamsi

Phrynops williamsi 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 Phrynops williamsi rather than just read about it. In short: Phrynops williamsi, also known commonly as Williams' side-necked turtle, Williams' South American sideneck turtle, William's [sic] South American side-necked turtle, William's [sic] toadhead turtle, and Williams' toadhead turtle, is a species of turtle in the family Chelidae. The species is endemic to South America.

Key takeaways

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

Reference excerpt

Phrynops williamsi, also known commonly as Williams' side-necked turtle, Williams' South American sideneck turtle, William's [sic] South American side-necked turtle, William's [sic] toadhead turtle, and Williams' toadhead turtle, is a species of turtle in the family Chelidae. The species is endemic to South America.

Etymology The specific name, williamsi, is in honor of American herpetologist Ernest E. Williams.

Geographic range P. williamsi is found in southeastern Brazil, Uruguay, and Argentina.

Habitat The preferred natural habitat of P. williamsi is freshwater wetlands, at altitudes of 80–1,000 m (260–3,280 ft).

References

Further reading Borteiro, Claudio; Kolenc, Francisco; Prigioni, Carlos (2015). "A new noteworthy record of Phrynops williamsi Rhodin & Mittermeier (Testudines, Chelidae) in Uruguay". Cuadernos de Herpetología 29 (1): 95–96. Buskirk, James R. (1989). "Field observations on Phrynops williamsi and other Uruguayan chelonians". Vivarium 1 (4): 8–11. Cabrera, Mario R. (1993). "Phrynops williamsi (Williams' South American Sideneck Turtle). Argentina: Corrientes". Herpetological Review 24 (2): 65–66.

External links Data related to Phrynops williamsi at Wikispecies

Illustrations

Worked examples

Example 1 — a first encounter with Phrynops williamsi

Start with the simplest possible case. Write down what Phrynops williamsi 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 Phrynops williamsi 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 Phrynops williamsi 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 Phrynops williamsi

In research: Phrynops williamsi 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 Phrynops williamsi 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: Phrynops williamsi is common in secondary-school and first-year university syllabi. It links to neighbouring topics IUCN Red List vulnerable species, Phrynops, Reptiles described in 1983, so understanding it makes those chapters shorter.
In everyday life: Look for Phrynops williamsi 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 Phrynops williamsi in 20 minutes

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

Frequently asked questions

What is Phrynops williamsi in simple terms?

Why does Phrynops williamsi 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 Phrynops williamsi?

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 Phrynops williamsi.