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List of endangered molluscs

List of endangered 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 endangered molluscs rather than just read about it. In short: In September 2016, the International Union for Conservation of Nature (IUCN) listed 507 endangered mollusc species. Of all evaluated mollusc species, 7.0% are listed as endangered.

List of endangered molluscs — main illustration
List of endangered molluscs — illustration

Key takeaways

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

Reference excerpt

In September 2016, the International Union for Conservation of Nature (IUCN) listed 507 endangered mollusc species. Of all evaluated mollusc species, 7.0% are listed as endangered. The IUCN also lists nine mollusc subspecies as endangered. No subpopulations of molluscs have been evaluated by the IUCN. For a species to be considered endangered by the IUCN it must meet certain quantitative criteria which are designed to classify taxa facing "a very high risk of extinction". An even higher risk is faced by critically endangered species, which meet the quantitative criteria for endangered species. Critically endangered molluscs are listed separately. There are 1088 mollusc species which are endangered or critically endangered. 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 endangered mollusc species and subspecies evaluated by the IUCN.

Gastropods There are 448 species and seven subspecies of gastropod assessed as endangered.

Stylommatophora Stylommatophora is a very diverse group that includes the majority of land snails and slugs. There are 187 species and two subspecies in the order Stylommatophora assessed as endangered.

Partulids

Achatinellids

Cerastids

Endodontids

Charopids

Helicarionids

Orthalicids Species

Subspecies

Orthalicus reses reses (Stock Island tree snail)

Euconulids

Streptaxids Species

Subspecies

Tayloria urguessensis subangulata

Camaenids

Helicids

Hygromiids

Other stylommatophoran species

Littorinimorpha There are 147 littorinimorph species and three subspecies assessed as endangered.

Hydrobiids

Bithyniids Species

Subspecies

Assimineids

Pomatiopsids

Other Littorinimorpha species

Sorbeoconcha

Architaenioglossa Species

Subspecies

Bellamya unicolor abyssinicus Maizania hildebrandti thikensis

Cycloneritimorpha

Hygrophila species There are 22 Hygrophila species assessed as endangered.

Planorbids

Lymnaeids

Neogastropoda

Other gastropod species

Bivalvia There are 57 species and two subspecies in the class Bivalvia assessed as endangered.

Unionida There are 54 species and two subspecies in the order Unionoida assessed as endangered.

Margaritiferids

Unionids Species

Subspecies

Catspaw (Epioblasma obliquata obliquata) Rough rabbitsfoot (Quadrula cylindrica strigillata)

Other Unionida species

Venerida

Cephalopods Cirroctopus hochbergi Opisthoteuthis mero

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

References

Illustrations

List of endangered molluscs: Endangered (EN) species are considered to be facing a very high risk of extinction in the wild.
Endangered (EN) species are considered to be facing a very high risk of extinction in the wild.
List of endangered molluscs: A shell of Eua zebrina
A shell of Eua zebrina
List of endangered molluscs: A live specimen of Samoa diaphana
A live specimen of Samoa diaphana
List of endangered molluscs: A live specimen of Newcombia cumingi
A live specimen of Newcombia cumingi
List of endangered molluscs: A shell of Partulina variabilis
A shell of Partulina variabilis

Worked examples

Example 1 — a first encounter with List of endangered molluscs

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

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

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what List of endangered 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 endangered molluscs out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is List of endangered molluscs in simple terms?

In September 2016, the International Union for Conservation of Nature (IUCN) listed 507 endangered mollusc species. Of all evaluated mollusc species, 7.0% are listed as endangered.

Why does List of endangered 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 endangered 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 endangered molluscs.

Tags

  • IUCN Red List endangered species
  • Lists of animals by conservation status

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