earth science

Terebra subulata

Terebra subulata 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 Terebra subulata rather than just read about it. In short: Terebra subulata is a species of sea snail, a marine gastropod mollusk in the family Terebridae, the auger snails. Description Shells of Terebra subulata can reach a length of 115 mm (4.5 in) and a width of 16 mm (0.63 in).

Key takeaways

Terebra subulata 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 Terebra subulata to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Terebra subulata from memory before moving on to harder problems.

Reference excerpt

Terebra subulata is a species of sea snail, a marine gastropod mollusk in the family Terebridae, the auger snails.

Description Shells of Terebra subulata can reach a length of 115 mm (4.5 in) and a width of 16 mm (0.63 in). They have about 25 well-rounded whorls and a pointed spire. The aperture is very small and the outer lip is thin. The columella is twisted and the fasciole small. The anterior canal is truncated and curved. The shell is sculptured with fine axial threads and irregular weak spiral grooves, and the area below the suture raised into a spiral band. The color of the shell is cream with two rows of dark brown square blotches on the early whorls and three rows on the body whorl.

Distribution and habitat This species can be found from the coast of East Africa and Madagascar to Eastern Polynesia, Japan, Hawaii, and Australia, at depth of 0 to 10 m.

Diet Terebra subulata feeds on sand-dwelling Polychaeta and Enteropneusta. The prey is stung with the snail's radula teeth and paralysed by a venom, which is toxic to annelids and nematodes, but harmless to vertebrates.

References

Bratcher T. & Cernohorsky W.O. (1987). Living terebras of the world. A monograph of the recent Terebridae of the world. American Malacologists, Melbourne, Florida & Burlington, Massachusetts. 240 pp. Terryn, Y. (2007). Terebridae: A Collectors Guide. Conchbooks & Natural Art. 59 pp + plates Severns, M. (2011). Shells of the Hawaiian Islands - The Sea Shells. Conchbooks, Hackenheim. 564 pp Liu, J.Y. [Ruiyu] (ed.). (2008). Checklist of marine biota of China seas. China Science Press. 1267 pp. Steyn, D. G.; Lussi, M. (2005). Offshore Shells of Southern Africa: A pictorial guide to more than 750 Gastropods. Published by the authors. pp. i–vi, 1–289.

External links

Linnaeus, C. (1767). Systema naturae per regna tria naturae: secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis. Ed. 12. 1., Regnum Animale. 1 & 2. Holmiae Fedosov, A. E.; Malcolm, G.; Terryn, Y.; Gorson, J.; Modica, M. V.; Holford, M.; Puillandre, N. (2020). Phylogenetic classification of the family Terebridae (Neogastropoda: Conoidea). Journal of Molluscan Studies. 85(4): 359-388

Illustrations

Worked examples

Example 1 — a first encounter with Terebra subulata

Start with the simplest possible case. Write down what Terebra subulata 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 Terebra subulata 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 Terebra subulata 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 Terebra subulata

In research: Terebra subulata 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 Terebra subulata 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: Terebra subulata is common in secondary-school and first-year university syllabi. It links to neighbouring topics Animal taxa named by Carl Linnaeus, Gastropods described in 1758, Molluscs of the Indian Ocean, so understanding it makes those chapters shorter.
In everyday life: Look for Terebra subulata 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 Terebra subulata in 20 minutes

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

Frequently asked questions

What is Terebra subulata in simple terms?

Terebra subulata is a species of sea snail, a marine gastropod mollusk in the family Terebridae, the auger snails. Description Shells of Terebra subulata can reach a length of 115 mm (4.5 in) and a width of 16 mm (0.63 in).

Why does Terebra subulata 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 Terebra subulata?

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 Terebra subulata.