biology

Spea

Spea 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 Spea rather than just read about it. In short: Spea is a genus of North American amphibian commonly referred to as the western spadefoot toads. They differ greatly from true toads (those of the family Bufonidae) by having eyes with vertical pupils, no parotoid glands, and relatively smooth skin.

Key takeaways

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

Reference excerpt

Spea is a genus of North American amphibian commonly referred to as the western spadefoot toads. They differ greatly from true toads (those of the family Bufonidae) by having eyes with vertical pupils, no parotoid glands, and relatively smooth skin. Their most distinctive feature is a spade-like projection on their hind feet, from which their common name is derived. This projection enables spadefoot toads to dig in loose soils with ease. Its name is from the Ancient Greek speos (σπέος, ‘cave, cavern’)

Species Spea species were once classified with their European cousins in the family Pelobatidae, but have since been reclassified to their own family, Scaphiopodidae with other North American species. There are four extant species in the genus Spea:

Plains spadefoot toad, Spea bombifrons (Cope, 1863) Western spadefoot toad, Spea hammondii (Baird, 1859) Great Basin spadefoot toad, Spea intermontana (Cope, 1863) New Mexico spadefoot toad, Spea multiplicata (Cope, 1863) †Spea labreae Cruz & Lindsey, 2026

Related species Genus Scaphiopus, southern spadefoot toads

Couch's spadefoot toad, Scaphiopus couchii (Baird, 1854) Eastern spadefoot (toad), Scaphiopus holbrookii (Harlan, 1835) Hurter's spadefoot toad, Scaphiopus hurterii (Strecker, 1910)

References

"Spea". Integrated Taxonomic Information System. Retrieved 1 May 2006.

Illustrations

Worked examples

Example 1 — a first encounter with Spea

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

In research: Spea 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 Spea 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: Spea is common in secondary-school and first-year university syllabi. It links to neighbouring topics Amphibian genera, Frog stubs, Spea, so understanding it makes those chapters shorter.
In everyday life: Look for Spea 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 Spea in 20 minutes

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

Frequently asked questions

What is Spea in simple terms?

Why does Spea 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 Spea?

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 Spea.