earth science

Hastula cinerea

Hastula cinerea 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 Hastula cinerea rather than just read about it. In short: Hastula cinerea, the grey Atlantic auger, is a species of sea snail, a marine gastropod mollusc in the family Terebridae, the auger snails. Description The length of the shell varies between 16 mm and 68 mm.

Key takeaways

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

Reference excerpt

Hastula cinerea, the grey Atlantic auger, is a species of sea snail, a marine gastropod mollusc in the family Terebridae, the auger snails.

Description The length of the shell varies between 16 mm and 68 mm. Protoconch is a very dark/black sharp tip, and a horny brown operculum is present. No periostracum, shell is glossy overall. They tend to have larger feet because it helps stabilize themselves into the sand due to the species of sea snail living in a more active zone of the ocean.

Distribution This shallow-water species occurs in the Atlantic Ocean off Angola, Cape Verde, Senegal and Brazil; in the Caribbean Sea, the Gulf of Mexico and the Lesser Antilles; in the Indian Ocean off Madagascar. Hastula cinerea are mostly found in intertidal zones, but can also be found in high water-line zones.

References

Dautzenberg, Ph. (1929). Contribution à l'étude de la faune de Madagascar: Mollusca marina testacea. Faune des colonies françaises, III(fasc. 4). Société d'Editions géographiques, maritimes et coloniales: Paris. 321–636, plates IV-VII pp. Bouchet P. (1983 ["1982"]) Les Terebridae (Mollusca, Gastropoda) de l'Atlantique oriental. Bollettino Malacologico 18: 185–216. 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. 240pp. Luiz, R., & Simone. (n.d.). Comparative morphology and systematics of Brazilian Terebridae (Mollusca, Gastropoda, Conoidea), with descriptions of three new species. http://www.moluscos.org/trabalhos/1999/Simone%201999%20Terebridae.pdf Luz, Matos, A. S., Cristina, & Matthews-Cascon, H. (2023). Variation in hypodermic radular teeth of the snail auger Hastula cinerea (Born, 1778) (Gastropoda:Terebridae). Zoology, 158, 126083–126083. https://doi.org/10.1016/j.zool.2023.126083 Terryn Y. (2007). Terebridae: A Collectors Guide. Conchbooks & NaturalArt. 59pp + plates. Vista do On Hastula cinerea. (2024). Revistas.usp.br. https://www.revistas.usp.br/bffclzoologia/article/view/120433/117541

External links Adams, C. B. 1850. Description of supposed new species of marine shells which inhabit Jamaica. Contributions to Conchology, 4: 56-68, 109-123 Rosenberg, G.; Moretzsohn, F.; García, E. F. (2009). Gastropoda (Mollusca) of the Gulf of Mexico, Pp. 579–699 in: Felder, D.L. and D.K. Camp (eds.), Gulf of Mexico–Origins, Waters, and Biota. Texas A&M Press, College Station, Texas Archived 2 February 2017 at the Wayback Machine 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 "Impages cinerea". Gastropods.com. Retrieved 16 January 2019. Media related to Hastula cinerea at Wikimedia Commons

Illustrations

Worked examples

Example 1 — a first encounter with Hastula cinerea

Start with the simplest possible case. Write down what Hastula cinerea 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 Hastula cinerea 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 Hastula cinerea 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 Hastula cinerea

In research: Hastula cinerea 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 Hastula cinerea 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: Hastula cinerea is common in secondary-school and first-year university syllabi. It links to neighbouring topics Gastropods described in 1778, Hastula, Molluscs of the Atlantic Ocean, so understanding it makes those chapters shorter.
In everyday life: Look for Hastula cinerea 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 Hastula cinerea in 20 minutes

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

Frequently asked questions

What is Hastula cinerea in simple terms?

Hastula cinerea, the grey Atlantic auger, is a species of sea snail, a marine gastropod mollusc in the family Terebridae, the auger snails. Description The length of the shell varies between 16 mm and 68 mm.

Why does Hastula cinerea 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 Hastula cinerea?

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 Hastula cinerea.