biology

Vertigo angustior

Vertigo angustior is a biology 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 Vertigo angustior rather than just read about it. In short: Vertigo angustior, the narrow-mouthed whorl snail, is a species of small land snail, a terrestrial pulmonate gastropod mollusk or micromollusk in the family Vertiginidae, the whorl snails. Subspecies † Vertigo angustior intermedia Schlickum & Strauch, 1979 Description The shell measures 1.6 to 2.0 mm (mean: 1.8 mm) in height and 0.9 1.05 mm (mean: 1 mm) in width.

Key takeaways

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

Reference excerpt

Vertigo angustior, the narrow-mouthed whorl snail, is a species of small land snail, a terrestrial pulmonate gastropod mollusk or micromollusk in the family Vertiginidae, the whorl snails.

Subspecies

† Vertigo angustior intermedia Schlickum & Strauch, 1979

Description The shell measures 1.6 to 2.0 mm (mean: 1.8 mm) in height and 0.9 1.05 mm (mean: 1 mm) in width. It is oblong ovoid with 4.5 to 5.35 whorls (mean 5). The aperture is sinistral and relatively small. The aperture edge is bent (indented) and slightly thickened and the aperture is slightly notched, the notch continuing outside as a spiral groove. The aperture bears 5-6 mainly short denticles: 2 parietal; 2 columellar; 1 palatal, the latter relatively long. The shell is brown to yellowish brown or horn coloured and has a fine growth striation.

Distribution IUCN red list - conservation dependent It is mentioned in Annex II of the European Union's Habitats Directive. The species occurs in many countries in Europe and in Asia: Western Europe:

Great Britain in List of endangered species in the British Isles (Ireland, United Kingdom). Endangered in Great Britain. Ireland Conservation status: Vulnerable (VU) Belgium France Liechtenstein Netherlands Switzerland Central Europe:

Austria Czech Republic - vulnerable (VU). Its conservation status in the Czech Republic in 2004-2006 is bad (U2) in pannonian area and favourable (FV) in continental area in report for European Commission in accordance with Habitats Directive. Germany Hungary Poland - endangered Slovakia Slovenia Northern Europe: Denmark, Finland, Norway, Sweden Eastern Europe: Belarus, Estonia, Latvia, Lithuania, Russian Federation, Ukraine Southern Europe: Italy, Romania Asia: Armenia, Azerbaijan, Georgia.

References

Further reading Zofia Książkiewicz. January 2008. The narrow-mouthed whorl snail Vertigo angustior (Pulmonata: Gastropoda: Vertiginidae) - distribution and habitat disturbance in northwestern Poland. Provoost, S.; Bonte, D. (Ed.) (2004). Animated dunes: a view of biodiversity at the Flemish coast [Levende duinen: een overzicht van de biodiversiteit aan de Vlaamse kust]. Mededelingen van het Instituut voor Natuurbehoud, 22. Instituut voor Natuurbehoud: Brussel, Belgium. ISBN 90-403-0205-7. 416, ill., appendices pp. Tentacle 16. 5–6. The narrow-mouthed whorl snail (Vertigo angustior) (1014) Conservation Status Assessment Report. Sysoev, A. V. & Schileyko, A. A. (2009). Land snails and slugs of Russia and adjacent countries. Sofia/Moskva (Pensoft). 312 pp., 142 plates.

External links

Jeffreys, J. G. (1830). A synopsis of the testaceous pneumonobranchous Mollusca of Great Britain. Transactions of the Linnean Society of London. 16: 323-392 Müller, A. (1838). Ueber einige vaterländische Landschnecken. Archiv für Naturgeschichte. 4, 1: 209-211, pl. 4. Berlin Michaud, A.-L.-G. (1831). Complément de l'Histoire des mollusques terrestres et fluviatiles de la France, de J.P.R. Draparnaud. i-xvi, 1-116, Errata (1 p.), 1-12, pls 14-16. (December). Verdun: Lippmann Schileyko, A. A. & Rymzhanov, T. S. (2013). Fauna of land mollusks (Gastropoda, Pulmonata Terrestria) of Kazakhstan and adjacent territories. Moscow-Almaty: KMK Scientific Press. 389 pp Vertigo angustior at Animalbase taxonomy, short description, distribution, biology, status (threats), images photo of Vertigo angustior https://web.archive.org/web/20081108053410/http://www.staff.amu.edu.pl/~polmal/smp/v115.htm MNHN, Paris: specimen

Illustrations

Worked examples

Example 1 — a first encounter with Vertigo angustior

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

In research: Vertigo angustior appears in biology 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 Vertigo angustior 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: Vertigo angustior is common in secondary-school and first-year university syllabi. It links to neighbouring topics Gastropods described in 1830, Habitats Directive species, IUCN Red List near threatened species, so understanding it makes those chapters shorter.
In everyday life: Look for Vertigo angustior 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 Vertigo angustior in 20 minutes

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

Frequently asked questions

What is Vertigo angustior in simple terms?

Vertigo angustior, the narrow-mouthed whorl snail, is a species of small land snail, a terrestrial pulmonate gastropod mollusk or micromollusk in the family Vertiginidae, the whorl snails. Subspecies † Vertigo angustior intermedia Schlickum & Strauch, 1979 Description The shell measures 1.6 to 2.0…

Why does Vertigo angustior matter?

Because it connects several biology 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 Vertigo angustior?

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 Vertigo angustior.