science

Latouchella

Latouchella 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 Latouchella rather than just read about it. In short: Latouchella is an extinct genus of marine invertebrate animal, that is considered to be a mollusk and which may be a sea snail, a gastropod. It is a helcionellid from the Tommotian epoch of what is now Siberia.

Key takeaways

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

Reference excerpt

Latouchella is an extinct genus of marine invertebrate animal, that is considered to be a mollusk and which may be a sea snail, a gastropod. It is a helcionellid from the Tommotian epoch of what is now Siberia. Its tightly coiled, spiral shell contains a number of low "walls" running up the front surface of the interior; these would have directed water currents within its shell. Between these walls are a series of furrows, parallel to the shell's aperture, giving casts of the internal structure the appearance of a railway line, with sleepers (created by furrows) tying together paired rails that run towards the apex of the shell. It was named by Edgar Sterling Cobbold in 1921 for the Rev. William Martin Digues La Touche of Wistanstow, Shropshire, England, in whose collection it was found.

Description This genus had a curved, segmented shell, and it is often reconstructed as a snail-like creature.

Older taxonomy The taxonomy of the genus Latouchella was originally like this: class Helcionelloida, order Helcionellida, superfamily Helcionelloidea, family Helcionellidae.

2005 taxonomy The taxonomy of the Gastropoda by Bouchet & Rocroi, 2005 categorizes Latouchella in the family Coreospiridae in the superfamily Scenelloidea within the Paleozoic molluscs of uncertain systematic position. Latouchella was a type genus in the family Latouchellidae Golikov & Starobogatov, 1989, however Latouchellidae is a synonym of Coreospiridae.

2006-2007 taxonomy The 2006–2007 taxonomy of the genus Latouchella is like this: class Helcionelloida, subclass Archaeobranchia, order Helcionelliformes, superfamily Helcionelloidea, family Coreospiridae.

Species Species in the genus Latouchella include:

Latouchella costata (type) L. accordionata L. adelocosma L. adunca L. alicae L. arcuata L. arguta L. burlingi L. dimicostata L. holmdalense L. iacobinica L. korobokovi L. merino L. ostenfeldense L. pearylandica L. pocatelloensis L. sonlingpoensis L. taijiangensis ? Latouchella memorabilis Missarzhevsky in Rozanov et al., 1969 ? Latouchella orientalis

Illustrations

Worked examples

Example 1 — a first encounter with Latouchella

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

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

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

Frequently asked questions

What is Latouchella in simple terms?

Why does Latouchella 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 Latouchella?

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 Latouchella.