science

Xenoxylon latiporosum

Xenoxylon latiporosum 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 Xenoxylon latiporosum rather than just read about it. In short: Xenoxylon latiporosum is a fossil conifer, first described as Pinites latiporosus in 1868 by Carl Eduard Cramer, but this wood fossil species was transferred in 1905 to the newly described extinct plant fossil genus, Xenoxylon, by Walther Gothan. It is thought to be a conifer (in the class Pinopsida).

Key takeaways

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

Reference excerpt

Xenoxylon latiporosum is a fossil conifer, first described as Pinites latiporosus in 1868 by Carl Eduard Cramer, but this wood fossil species was transferred in 1905 to the newly described extinct plant fossil genus, Xenoxylon, by Walther Gothan. It is thought to be a conifer (in the class Pinopsida). The Cretaceous fossil wood, Xenoxylon, is known from China, Japan, South Korea, Japan, Manchuria, Siberia, and many other northern hemisphere sites and corresponds to no modern plant. (Gothan says "The structure of this wood among the living and fossil gymnosperm woods is without analogue".) Xenoxylon trees lived in a paleoclimate which was temperate to cool temperate, and in wet environments, and the presence of Xenoxylon is a marker of global climate change in the Mesozoic era. Xenoxylon is distinguished from other conifer-like fossil genera by having "clusters of very flattened pits ... on radial tracheid walls", while Gothan's protologue describes Xenoxylon as "wood distinguished by the large oopores of the medullary rays and the very large areolate pits, which are uniseriate and strongly flattened on both sides because of the dense arrangement". The fossil genera Sciadopityoxylon Schmalhausen, and Trematoxylon Hartig are thought to be probable synonyms. Xenoxylon latiporosum has very flattened radial pits (twice as wide as they are high). Xenoxylon is known from the Mesozoic, and occurs from the Late Triassic to the Late Cretaceous.

References

External links

Worked examples

Example 1 — a first encounter with Xenoxylon latiporosum

Start with the simplest possible case. Write down what Xenoxylon latiporosum 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 Xenoxylon latiporosum 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 Xenoxylon latiporosum 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 Xenoxylon latiporosum

In research: Xenoxylon latiporosum 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 Xenoxylon latiporosum 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: Xenoxylon latiporosum is common in secondary-school and first-year university syllabi. It links to neighbouring topics Carboniferous plants, Cretaceous plants, Plants described in 1868, so understanding it makes those chapters shorter.
In everyday life: Look for Xenoxylon latiporosum 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 Xenoxylon latiporosum in 20 minutes

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

Frequently asked questions

What is Xenoxylon latiporosum in simple terms?

Why does Xenoxylon latiporosum 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 Xenoxylon latiporosum?

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 Xenoxylon latiporosum.