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List of critically endangered invertebrates

List of critically endangered invertebrates 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 critically endangered invertebrates rather than just read about it. In short: As of July 2016, the International Union for Conservation of Nature (IUCN) listed 987 critically endangered invertebrate species, including 206 which are tagged as possibly extinct. Of all evaluated invertebrate species, 5.5% are listed as critically endangered.

List of critically endangered invertebrates — main illustration
List of critically endangered invertebrates — illustration

Key takeaways

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

Reference excerpt

As of July 2016, the International Union for Conservation of Nature (IUCN) listed 987 critically endangered invertebrate species, including 206 which are tagged as possibly extinct. Of all evaluated invertebrate species, 5.5% are listed as critically endangered. The IUCN also lists 14 invertebrate subspecies as critically endangered. No subpopulations of invertebrates have been evaluated by the IUCN. Additionally 5278 invertebrate species (29% 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 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 critically endangered invertebrate species and subspecies as evaluated by the IUCN. Species considered possibly extinct by the IUCN are marked as such.

Nemertea Prosadenoporus agricola (possibly extinct)

Annelids Mesonerilla prospera

Onychophora

Molluscs

There are 581 mollusc species and 11 mollusc subspecies assessed as critically endangered.

Gastropods There are 511 gastropod species and six gastropod subspecies assessed as critically endangered.

Stylommatophora Stylommatophora includes the majority of land snails and slugs. There are 233 species and five subspecies in the order Stylommatophora assessed as critically endangered.

Amastrids

Partulids

Achatinellids

Endodontids Species

Subspecies

Charopids

Helicarionids

Orthalicids

Rhytidids

Streptaxids

Lauriids

Helicids

Hygromiids

Enids

Other Stylommatophora species

Littorinimorpha There are 181 species in the order Littorinimorpha assessed as critically endangered.

Hydrobiids

Cochliopids

Bithyniids

Moitessieriids Henrigirardia wienini (possibly extinct) Spiralix corsica (possibly extinct)

Assimineids

Pomatiopsids

Sorbeoconcha

Architaenioglossa There are 48 species in the order Architaenioglossa assessed as critically endangered.

Cyclophorids

Diplommatinids

Viviparids

Other Architaenioglossa species

Cycloneritimorpha

Hygrophila Species

Subspecies

Bulinus tropicus torensis

Neogastropoda

Other gastropod species

Bivalvia There are 69 species and five subspecies in the class Bivalvia assessed as critically endangered.

Unionida There are 66 species and five subspecies in the order Unionoida assessed as critically endangered.

Margaritiferids Species

Subspecies

Margaritifera margaritifera durrovensis

Etheriids Acostaea rivolii

Unionids Species

Subspecies

Hyriids Glenelg freshwater mussel (Hyridella glenelgensis)

Venerida

Sphaeriida Euglesa maasseni

Cephalopods Roughy umbrella octopus (Opisthoteuthis chathamensis)

Cnidaria

Anthozoa

Hydrozoa

Arthropods

There are 394 arthropod species and three arthropod subspecies assessed as critically endangered.

Centipedes

Seed shrimps Kapcypridopsis barnardi Spelaeoecia bermudensis

Arachnids There are 47 arachnid species assessed as critically endangered.

Harvestmen

Spiders

Other arachnid species

Branchiopoda

Millipedes

Entognatha Ceratophysella sp. nov. 'HC' (possibly extinct) Delamarephorura tami (possibly extinct)

Maxillopoda Includes barnacles, copepods and a number of related animals.

Malacostracans Malacostraca includes crabs, lobsters, crayfish, shrimp, krill, woodlice, and many others. There are 125 malacostracan species and one malacostracan subspecies assessed as critically endangered.

Mysida Bermudamysis speluncola Sterrer's cave mysid (Platyops sterreri)

Mictaceans Mictocaris halope

Isopods

Amphipods

Decapods There are 106 decapod species and one decapod subspecies assessed as critically endangered.

Parastacids

Gecarcinucids

Atyids

Cambarids Species

Subspecies

Procambarus rogersi expletus

Palaemonids

Other decapod species

Insects

There are 195 insect species and two insect subspecies assessed as critically endangered.

Blattodea

Orthoptera There are 72 species in the order Orthoptera assessed as critically endangered.

Euschmidtiids

Crickets

Acridids

Tettigoniids

Other Orthoptera species

Hymenoptera

Lepidoptera Moths and butterflies

Beetles

Odonata Includes dragonflies and damselflies. Species

Subspecies

Chlorogomphus brunneus keramensis Delphi cordulegaster (Cordulegaster helladica kastalia)

Other insect species

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

References

Illustrations

List of critically endangered invertebrates: Critically endangered (CR) species face an extremely high risk of extinction in the wild.
Critically endangered (CR) species face an extremely high risk of extinction in the wild.

Worked examples

Example 1 — a first encounter with List of critically endangered invertebrates

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

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

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

Frequently asked questions

What is List of critically endangered invertebrates in simple terms?

As of July 2016, the International Union for Conservation of Nature (IUCN) listed 987 critically endangered invertebrate species, including 206 which are tagged as possibly extinct. Of all evaluated invertebrate species, 5.5% are listed as critically endangered.

Why does List of critically endangered invertebrates 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 critically endangered invertebrates?

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 critically endangered invertebrates.

Tags

  • Critically endangered animals
  • IUCN Red List critically endangered species
  • Lists of invertebrates

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