earth science

Haliotis clathrata

Haliotis clathrata is a earth 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 Haliotis clathrata rather than just read about it. In short: Haliotis clathrata, common name the lovely abalone, is a species of sea snail, a marine gastropod mollusc in the family Haliotidae, the abalone. Description The size of the shell varies between 10 mm and 60 mm.

Key takeaways

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

Reference excerpt

Haliotis clathrata, common name the lovely abalone, is a species of sea snail, a marine gastropod mollusc in the family Haliotidae, the abalone.

Description The size of the shell varies between 10 mm and 60 mm. The large, solid but not thick shell has a rounded-oval shape and is much depressed. The distance of the apex measures from the margin one-fifth the length of the shell. The shell is sculptured with fine spiral cords cut by close minute striae of increment and has radiating waves or folds above. A slight angle at the row of perforations, below it is broadly excavated and then carinated. The about six perforations are elevated and circular. The outline is suborbicular and much depressed. The color pattern of the surface is either dark red with few radiating angular white patches, or dull red and green, streaked and mottled. The spiral cords of the outer surface are either nearly equal or have slightly larger ones at wide intervals. They are decussated by close growth-striae. The whorls number a trifle over three. The inner surface is corrugated like the outer surface, silvery, very brilliantly iridescent. The reflections are chiefly sea-green and red. The columellar plate is broad, flat, and obliquely truncated at its base. The cavity of the spire is wide, open, but shallow. This is a variable form, in color varying from dark coral red to dull red streaked with pale green. This species also occurs in a different form: Haliotis clathrata f. tomricei (Patamakanthin, 2002). The shape of the shell forms a logarithmic spiral with an expansion coefficient of 0.25, which is close to the 0.31 coefficient of a golden spiral, although shells exist with a wide range of coefficients and this proximity is of no particular significance.

Distribution This marine species occurs in the western Pacific Ocean, on the coasts of including Australia and the islands and mainland of Southeast Asia, as well as islands in the Indian Ocean such as Madagascar and Mauritius and stretches of the East African coast.

References

Reeve, L.A. 1846. Descriptions of forty species of Haliotis, from the collection of H. Cumming, Esq. Proceedings of the Zoological Society of London 14: 53–59 Adams, A. & Reeve, L. 1850. Mollusca. pp. 45–87 in Adams, A. (ed.). The Zoology of the Voyage of H.M.S. Samarang; under the command of Captain Sir Edward Belcher, C.B.F.R.A.S., F.G.S. during the years 1843-1846. London : Reeve, Benham & Reeve Vol. 3. Ladd, H.S. in Ladd, H.S. & Hoffmeister, J.E. 1945. The Geology of Lau, Fiji. Bulletin of the Bernice P. Bishop Museum 181: 331–370 Geiger, D.L. 2000 [1999]. Distribution and biogeography of the recent Haliotidae (Gastropoda: Vetigastropoda) world-wide. Bollettino Malacologico 35(5–12): 57-120 Geiger D.L. & Poppe G.T. (2000). A Conchological Iconography: The family Haliotidae. Conchbooks, Hackenheim Germany. 135pp 83pls.

External links

"Haliotis (Haliotis) clathrata". Gastropods.com. Retrieved 16 January 2019.

Illustrations

Worked examples

Example 1 — a first encounter with Haliotis clathrata

Start with the simplest possible case. Write down what Haliotis clathrata claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In earth 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 Haliotis clathrata 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 Haliotis clathrata 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 Haliotis clathrata

In research: Haliotis clathrata appears in earth 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 Haliotis clathrata 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: Haliotis clathrata is common in secondary-school and first-year university syllabi. It links to neighbouring topics Abalone, Gastropods described in 1846, IUCN Red List least concern species, so understanding it makes those chapters shorter.
In everyday life: Look for Haliotis clathrata 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 Haliotis clathrata in 20 minutes

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

Frequently asked questions

What is Haliotis clathrata in simple terms?

Haliotis clathrata, common name the lovely abalone, is a species of sea snail, a marine gastropod mollusc in the family Haliotidae, the abalone. Description The size of the shell varies between 10 mm and 60 mm.

Why does Haliotis clathrata matter?

Because it connects several earth 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 Haliotis clathrata?

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 Haliotis clathrata.