biology

Sympetrum dilatatum

Sympetrum dilatatum 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 Sympetrum dilatatum rather than just read about it. In short: Sympetrum dilatatum, the St. Helena darter, was a species of dragonfly in the family Libellulidae.

Key takeaways

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

Reference excerpt

Sympetrum dilatatum, the St. Helena darter, was a species of dragonfly in the family Libellulidae. It was endemic to Saint Helena. In 2021, it was declared extinct by the IUCN. There have been no recorded sightings since 1963 and it is no longer present at the only two locations it was previously found at.

References

Worked examples

Example 1 — a first encounter with Sympetrum dilatatum

Start with the simplest possible case. Write down what Sympetrum dilatatum 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 Sympetrum dilatatum 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 Sympetrum dilatatum 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 Sympetrum dilatatum

In research: Sympetrum dilatatum 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 Sympetrum dilatatum 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: Sympetrum dilatatum is common in secondary-school and first-year university syllabi. It links to neighbouring topics IUCN Red List extinct species, Insects described in 1892, Libellulidae, so understanding it makes those chapters shorter.
In everyday life: Look for Sympetrum dilatatum 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.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “Sympetrum dilatatum” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Sympetrum dilatatum in 20 minutes

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

Frequently asked questions

What is Sympetrum dilatatum in simple terms?

Sympetrum dilatatum, the St. Helena darter, was a species of dragonfly in the family Libellulidae.

Why does Sympetrum dilatatum 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 Sympetrum dilatatum?

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 Sympetrum dilatatum.