science

Gastropod classification

Gastropod classification is a 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 Gastropod classification rather than just read about it. In short: This overview lists proposed changes in the taxonomy of gastropods at the family level and above. There have been many changes in the way various groups of snails and slugs are classified.

Key takeaways

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

Reference excerpt

This overview lists proposed changes in the taxonomy of gastropods at the family level and above. There have been many changes in the way various groups of snails and slugs are classified. Changes in subfamilies are outlined in the respective articles about each particular family. Unchanged taxa are not listed here. In one of the largest recent changes (affecting the most species of gastropods), Klussmann-Kolb et al. (2008) showed that the traditional classification of the Euthyneura needed to be reconsidered. The change was subsequently made by Jörger et al. (2010), who redefined the major groups within the Heterobranchia. A great number of major changes have been made within the classification of the Conoidea since 2011.

Significant taxonomies Systems of classification are primarily of value to malacologists (people who study mollusks) and other biologists. Biological classification schemes are not merely a convenience, they are an attempt to show the actual phylogeny (the evolutionary relatedness) within a group of organisms. Thus, a taxonomy can be seen as an attempt to elucidate part of the tree of life, a phylogenetic tree. Gastropods are a taxonomic class of animals which consists of snails and slugs of every kind, from the land, from freshwater, and from saltwater.

Ponder & Lindberg, 1997 Towards a phylogeny of gastropod molluscs: an analysis using morphological characters. was published by Winston Ponder and David R. Lindberg in 1997. This taxonomy assigns the various Gastropods into ranked categories, such as sub-orders and families, but does not address the classification of genera or individual species. This classification scheme is based on the molluscs' internal and external shapes and forms, but did not take into account any analysis of their DNA or RNA. Ponder & Lindberg (1997) used only four families to analyze the Euthyneura. Further work by Dayrat & Tillier (2002) provided a great deal of detail about the relationships between within the Euthyneura. Ponder & Lindberg (1997) did not use Linnean taxonomical ranks in their work, but the results of their paper were widely adapted and used with Linnean taxonomical ranks by other authors. Class Gastropoda Cuvier, 1797 Incertæ sedis

Order Bellerophontinaka (fossil) Order Mimospirina (fossil) Subclass Eogastropoda Ponder & David R. Lindberg, 1996 (earlier: Prosobranchia)

Order Euomphalida de Koninck 1881 (fossil) Superfamily Macluritoidea Superfamily Euomphaloidea Superfamily Platyceratoidea

Order Patellogastropoda Lindberg, 1986 (true limpets) Suborder Patellina Van Ihering, 1876 Superfamily Patelloidea Rafinesque, 1815 Suborder Nacellina David R. Lindberg, 1988 Superfamily Acmaeoidea Carpenter, 1857 Superfamily Nacelloidea Thiele, 1891 Suborder Lepetopsina McLean, 1990 Superfamily Lepetopsoidea McLean, 1990 Subclass Orthogastropoda Ponder & David R. Lindberg, 1996 (earlier Prosobranchia, Opisthobranchia) Incertæ sedis

Order Murchisoniina Cox & Knight, 1960 (fossil) Superfamily Murchisonioidea Koken, 1889 Superfamily Loxonematoidea Koken, 1889 Superfamily Lophospiroidea Wenz, 1938 Superfamily Straparollinoidea Grade Subulitoidea Lindström, 1884 Superorder Cocculiniformia Haszprunar, 1987

Superfamily Cocculinoidea Dall, 1882 Superfamily Lepetelloidea Dall, 1882 (deep sea limpets) Superorder "Hot Vent Taxa" Ponder & David R. Lindberg, 1997

Order Neomphaloida Sitnikova & Starobogatov, 1983 Superfamily Neomphaloidea McLean, 1981 (hydrothermal vents limpets) Superfamily Peltospiroidea McLean, 1989 Superorder Vetigastropoda Salvini-Plawen, 1989 (limpets)

Superfamily Fissurelloidea Fleming, 1822 (keyhole limpets) Superfamily Haliotoidea Rafinesque, 1815 (abalones) Superfamily Lepetodriloidea McLean, 1988 (hydrothermal vent limpets) Superfamily Pleurotomarioidea Swainson, 1840 (slit shells) Superfamily Seguenzioidea Verrill, 1884 Superfamily Trochoidea Rafinesque, 1815 (top shells) Superorder Neritaemorphi Koken, 1896

Order Cyrtoneritomorpha (fossil) Order Neritopsina Cox & Knight, 1960 Superfamily Neritoidea Lamarck, 1809 Superorder Caenogastropoda Cox, 1960

Order Architaenioglossa Haller, 1890 Superfamily Ampullarioidea J.E. Gray, 1824 Superfamily Cyclophoroidea J.E. Gray, 1847 (terrestrials) Order Sorbeoconcha Ponder & David R. Lindberg, 1997 Suborder Discopoda P. Fischer, 1884 Superfamily Campaniloidea Douvillé, 1904 Superfamily Cerithioidea Férussac, 1822 Suborder Hypsogastropoda Ponder & David R. Lindberg, 1997 Infraorder Littorinimorpha Golikov & Starobogatov, 1975 Superfamily Calyptraeoidea Lamarck, 1809 Superfamily Capuloidea J. Fleming, 1822 Superfamily Carinarioidea Blainville, 1818 (formerly called Heteropoda) Superfamily Cingulopsoidea Fretter & Patil, 1958 Superfamily Cypraeoidea Rafinesque, 1815 (cowries) Superfamily Ficoidea Meek, 1864 Superfamily Laubierinoidea Warén & Bouchet, 1990 Superfamily Littorinoidea (Children), 1834 (periwinkles) Superfamily Naticoidea Forbes, 1838 (moon shells) Superfamily Rissooidea J.E. Gray, 1847 (Risso shells) (includes genus Oncomelania, schistosomiasis transmission vector) Superfamily Stromboidea Rafinesque, 1815 (true conchs) Superfamily Tonnoidea Suter, 1913 Superfamily Trivioidea Troschel, 1863 Superfamily Vanikoroidea J.E. Gray, 1840 Superfamily Velutinoidea J.E. Gray, 1840 Superfamily Vermetoidea Rafinesque, 1815 (worm shells) Superfamily Xenophoroidea Troschel, 1852 (carrier shells) Infraorder Ptenoglossa J.E. Gray, 1853 Superfamily Eulimoidea Philippi, 1853 Superfamily Janthinoidea Lamarck, 1812 Superfamily Triphoroidea J.E. Gray, 1847 Infraorder Neogastropoda Thiele, 1929 Superfamily Buccinoidea (whelks, false tritions) Superfamily Cancellarioidea Forbes & Hanley, 1851 Superfamily Conoidea Rafinesque, 1815 Superfamily Muricoidea Rafinesque, 1815 Superorder Heterobranchia J.E. Gray, 1840

… excerpt ends here. Continue reading the full article.

Illustrations

Worked examples

Example 1 — a first encounter with Gastropod classification

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

In research: Gastropod classification appears in 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 Gastropod classification 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: Gastropod classification is common in secondary-school and first-year university syllabi. It links to neighbouring topics Gastropod taxonomy, Malacological literature, so understanding it makes those chapters shorter.
In everyday life: Look for Gastropod classification 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 Gastropod classification in 20 minutes

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

Frequently asked questions

What is Gastropod classification in simple terms?

This overview lists proposed changes in the taxonomy of gastropods at the family level and above. There have been many changes in the way various groups of snails and slugs are classified.

Why does Gastropod classification matter?

Because it connects several 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 Gastropod classification?

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 Gastropod classification.