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List of vulnerable molluscs

List of vulnerable molluscs 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 List of vulnerable molluscs rather than just read about it. In short: In September 2016, the International Union for Conservation of Nature (IUCN) listed 879 vulnerable mollusc species. Of all evaluated mollusc species, 12% are listed as vulnerable.

List of vulnerable molluscs — main illustration
List of vulnerable molluscs — illustration

Key takeaways

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

Reference excerpt

In September 2016, the International Union for Conservation of Nature (IUCN) listed 879 vulnerable mollusc species. Of all evaluated mollusc species, 12% are listed as vulnerable. The IUCN also lists 18 mollusc subspecies as vulnerable. No subpopulations of molluscs have been evaluated by the IUCN. For a species to be assessed as vulnerable to extinction the best available evidence must meet quantitative criteria set by the IUCN designed to reflect "a high risk of extinction in the wild". Endangered and critically endangered species also meet the quantitative criteria of vulnerable species, and are listed separately. See: List of endangered molluscs, List of critically endangered molluscs. Vulnerable, endangered and critically endangered species are collectively referred to as threatened species by the IUCN. Additionally 1988 mollusc species (27% of those evaluated) are listed as data deficient, meaning there is insufficient information for a full assessment of conservation status. As these species typically have small distributions and/or populations, they are intrinsically likely to be threatened, according to the IUCN. While the category of data deficient indicates that no assessment of extinction risk has been made for the taxa, the IUCN notes that it may be appropriate to give them "the same degree of attention as threatened taxa, at least until their status can be assessed". This is a complete list of vulnerable mollusc species and subspecies evaluated by the IUCN.

Gastropods There are 828 species and 16 subspecies of gastropod assessed as vulnerable.

Stylommatophora Stylommatophora includes the majority of land snails and slugs. There are 339 species and six subspecies in the order Stylommatophora assessed as vulnerable.

Charopids

Helicarionids

Orthalicids

Euconulids

Streptaxids

Ferussaciids

Helminthoglyptids

Oxychilids

Camaenids

Lauriids

Vertiginids Species

Subspecies

Anauchen informis informis Anauchen informis parcedentata

Trissexodontids

Helicids Species

Subspecies

Hemicycla glyceia silensis

Hygromiids Species

Subspecies

Leptaxis simia portosancti

Vitrinids

Chondrinids

Enids

Other Stylommatophora Species

Subspecies

Chlorilis hungerfordiana rufopila Spelaeodiscus triarius tatricus

Littorinimorpha There are 324 species and seven subspecies in the order Littorinimorpha assessed as vulnerable.

Hydrobiids Species

Subspecies

Cochliopids

Bithyniids

Moitessieriids

Assimineids

Pomatiopsids

Amnicolids

Other Littorinimorpha species

Sorbeoconcha There are 55 species in the order Sorbeoconcha assessed as vulnerable.

Pleurocerids

Melanopsids Esperiana sangarica Melanopsis subgraellsiana

Thiarids

Pachychilids

Paludomids

Architaenioglossa Species

Subspecies

Renea moutonii moutonii Renea moutonii singularis

Lower Heterobranchia species

Cycloneritimorpha

Hygrophila Species

Subspecies

Gyraulus connollyi exilis

Neogastropoda

Conids

Eupulmonata Zospeum biscaiense Zospeum exiguum

Bivalvia There are 49 species and two subspecies in the class Bivalvia assessed as vulnerable.

Unionida There are 37 species and two subspecies in the order Unionoida assessed as vulnerable.

Margaritiferids Middendorff's freshwater pearl mussel (Margaritifera middendorffi)

Unionids Species

Subspecies

Lampsilis reeviana reeviana

Hyriids

Iridinids Species

Subspecies

Chambardia wahlbergi guillaini

Mycetopodids Diplodontites olssoni

Cardiida

Arcida Scaphula nagarjunai

Venerida

Cephalopods Opisthoteuthis calypso Opisthoteuthis massyae

See also Lists of IUCN Red List vulnerable species List of least concern molluscs List of near threatened molluscs List of endangered molluscs List of critically endangered molluscs List of recently extinct molluscs List of data deficient molluscs

References

Illustrations

List of vulnerable molluscs: Vulnerable (VU) species are considered to be facing a high risk of extinction in the wild.
Vulnerable (VU) species are considered to be facing a high risk of extinction in the wild.

Worked examples

Example 1 — a first encounter with List of vulnerable molluscs

Start with the simplest possible case. Write down what List of vulnerable molluscs 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 List of vulnerable molluscs 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 List of vulnerable molluscs 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 List of vulnerable molluscs

In research
List of vulnerable molluscs 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 List of vulnerable molluscs 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
List of vulnerable molluscs is common in secondary-school and first-year university syllabi. It links to neighbouring topics IUCN Red List vulnerable species, Lists of animals by conservation status, Lists of molluscs, so understanding it makes those chapters shorter.
In everyday life
Look for List of vulnerable molluscs 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 List of vulnerable molluscs in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what List of vulnerable molluscs means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain List of vulnerable molluscs out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is List of vulnerable molluscs in simple terms?

In September 2016, the International Union for Conservation of Nature (IUCN) listed 879 vulnerable mollusc species. Of all evaluated mollusc species, 12% are listed as vulnerable.

Why does List of vulnerable molluscs 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 List of vulnerable molluscs?

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 List of vulnerable molluscs.

Tags

  • IUCN Red List vulnerable species
  • Lists of animals by conservation status
  • Lists of molluscs

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