biology

Leptochilodiscus

Leptochilodiscus 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 Leptochilodiscus rather than just read about it. In short: Leptochilodiscus [= Kerberodiscus Bassett et al., 1976] is a genus of Lower Cambrian eodiscinid trilobite belonging to the family Weymouthiidae, order Agnostida. It lived during the Botomian stage = late Lower Cambrian Stage 4 (upper of two stages subdividing the unnamed Series 2); the upper Botomian Stage boundary corresponds to base of both the Middle Cambrian Wuliuan stage and Miaolingian Series.

Key takeaways

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

Reference excerpt

Leptochilodiscus [= Kerberodiscus Bassett et al., 1976] is a genus of Lower Cambrian eodiscinid trilobite belonging to the family Weymouthiidae, order Agnostida. It lived during the Botomian stage = late Lower Cambrian Stage 4 (upper of two stages subdividing the unnamed Series 2); the upper Botomian Stage boundary corresponds to base of both the Middle Cambrian Wuliuan stage and Miaolingian Series.

Type species Leptochilodiscus punctulatus Rasetti, 1966, from the Late Lower Cambrian of New York State. Holotype: U.S.N.M. 146009. Paratypes: U.S.N.M. 146010 and 146011.

Distribution Leptochilodiscus punctulatus Rasetti (1966, p. 26, Pl. 1, fig. 5; pl. 11, figures 1 - 7), the title erroneously printed Leptochilodiscus punctulatis [sic.], is part of a trilobite faunule that was collected from limestone beds which form several outcrops in a hillside on Griswold farm, about 1 mile southeast of North Chatham, Columbia County, New York State, USA; the faunule is referred to as the Acimetopus bilobatus faunule after one of the most common and characteristic trilobites. The Acimetopus bilobatus faunule is notable for the number and variety of trilobites of the family Eodiscidae. Leptochilodiscus succinctus (Bassett et al., 1976, p. 632, pl. 2, figs. 11 a - c) was collected from the upper part of the Hells Mouth Formation, 16.5 m below the base of the overlying Trwyn y Fulfran Formation at Trwyn Carreg-y-tir (grid reference SH 2876 2402), Llŷn Peninsula, North West Wales . The fauna is of late lower Cambrian age and falls within the upper part of the protolenid-strenuellid Zone of the Comley Series of British nomenclature. L. succinctus was originally described by Bassett et al., (op. cit.) as Kerberodiscus succinctus gen. et sp. nov.

References

Worked examples

Example 1 — a first encounter with Leptochilodiscus

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

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

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

Frequently asked questions

What is Leptochilodiscus in simple terms?

Why does Leptochilodiscus 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 Leptochilodiscus?

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 Leptochilodiscus.