Siphonodentalium

Key takeaways

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

Reference excerpt

Siphonodentalium is a genus of small tusk shells in the family Gadilidae.

Species Siphonodentalium australasiae Boissevain, 1906 Siphonodentalium booceras (Tomlin, 1926) Siphonodentalium colubridens (R. B. Watson, 1879) Siphonodentalium coronatum V. Scarabino & F. Scarabino, 2011 Siphonodentalium dalli (Pilsbry & Sharp, 1898) Siphonodentalium delicatulum (Suter, 1913) Siphonodentalium hexaschistum (Boissevain, 1906) Siphonodentalium isaotakii Habe, 1953 Siphonodentalium jaeckeli Scarabino, 1995 Siphonodentalium japonicum Habe, 1960 Siphonodentalium laubieri Bouchet & Warén, 1979 Siphonodentalium lobatum (G. B. Sowerby II, 1860) Siphonodentalium longilobatum (Boissevain, 1906) Siphonodentalium magnum (Boissevain, 1906) Siphonodentalium minutum Z.-Y. Qi, X.-T. Ma & J.-L. Zhang, 1998 Siphonodentalium okudai Habe, 1953 † Siphonodentalium parisiense (Deshayes, 1861) Siphonodentalium promontorii (Barnard, 1963) Siphonodentalium summa (Okutani, 1964) Synonyms

Siphonodentalium affine Sars M., 1865: synonym of Pulsellum affine (M. Sars, 1865) † Siphonodentalium bouryi Cossmann, 1888: synonym of † Dischides bouryi (Cossmann, 1888)( superseded combination) Siphonodentalium bushae (Henderson, 1920): synonym of Pulsellum bushae (J. B. Henderson, 1920) (original combination) Siphonodentalium dichelum R. B. Watson, 1879: synonym of Dischides dichelus (R. B. Watson, 1879) (original combination) Siphonodentalium eboracense R. B. Watson, 1879: synonym of Pulsellum eboracense (R. B. Watson, 1879) (original combination) Siphonodentalium galatheae Knudsen, 1964: synonym of Striopulsellum galatheae (Knudsen, 1964) (original combination) Siphonodentalium kikuchii Kuroda & Habe, 1952: synonym of Compressidens kikuchii (Kuroda & Habe, 1952) (original combination) Siphonodentalium lofotense M. Sars, 1865: synonym of Pulsellum lofotense (M. Sars, 1865) (original combination) † Siphonodentalium meyeri Cossmann, 1888: synonym of † Polyschides meyeri (Cossmann, 1888) (unaccepted > superseded combination) Siphonodentalium minimum Plate, 1909: synonym of Striopulsellum minimum (Plate, 1909) (original combination) Siphonodentalium occidentale Henderson, 1920: synonym of Pulsellum occidentale (Henderson, 1920) Siphonodentalium olivi: synonym of Polyschides olivi (Scacchi, 1835) Siphonodentalium pentagonum M. Sars, 1865: synonym of Entalina tetragona (Brocchi, 1814) Siphonodentalium platamodes R. B. Watson, 1879: synonym of Entalina platamodes (R. B. Watson, 1879) (original combination) Siphonodentalium prionotum R. B. Watson, 1879: synonym of Dischides prionotus (R. B. Watson, 1879) (original combination) Siphonodentalium quadridentatum Dall, 1881: synonym of Polyschides tetraschistus (R. B. Watson, 1879) Siphonodentalium quadrifissatum (Pilsbry & Sharp, 1898): synonym of Polyschides quadrifissatus (Pilsbry & Sharp, 1898) Siphonodentalium striatinum Henderson, 1920: synonym of Striopulsellum striatinum (Henderson, 1920) Siphonodentalium subfusiforme Sars M., 1865: synonym of Cadulus subfusiformis (M. Sars, 1865) Siphonodentalium teres Jeffreys, 1883: synonym of Pulsellum teres (Jeffreys, 1883) Siphonodentalium tetraschistum R. B. Watson, 1879: synonym of Polyschides tetraschistus (R. B. Watson, 1879) (original combination) Siphonodentalium verrilli Henderson, 1920: synonym of Pulsellum verrilli (Henderson, 1920)

References

Bouchet, P. & Warén, A., 1979 The abyssal molluscan fauna of the Norwegian Sea and its relation to the other faunas Sarsia, 64(3) 211-243 Gofas, S.; Le Renard, J.; Bouchet, P. (2001). Mollusca. in: Costello, M.J. et al. (eds), European Register of Marine Species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Patrimoines Naturels. 50: 180-213. Spencer, H.G., Marshall, B.A. & Willan, R.C. (2009). Checklist of New Zealand living Mollusca. Pp 196-219. in: Gordon, D.P. (ed.) New Zealand inventory of biodiversity. Volume one. Kingdom Animalia: Radiata, Lophotrochozoa, Deuterostomia. Canterbury University Press, Christchurch.

External links Sars, M. (1859). Bidrag til en skildring af den arktiske molluskfauna ved Norges nordlige kyst. Forhandlinger i Videnskabs-Selskabet i Christiania. (1858): 34-87 Sars, M. (1861). Om Siphonodentalium vitreum, en ny Slaegt og Art af Dentalidernes Familie. 23 pp. + 3 pl. Christiania, Brøgger & Christie Steiner, G.; Kabat, A. R. (2001). Catalogue of supraspecific taxa of Scaphopoda (Mollusca). Zoosystema. 23(3): 433-460

Illustrations

Worked examples

Example 1 — a first encounter with Siphonodentalium

Start with the simplest possible case. Write down what Siphonodentalium 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 Siphonodentalium 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 Siphonodentalium 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 Siphonodentalium

In research: Siphonodentalium 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 Siphonodentalium 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: Siphonodentalium is common in secondary-school and first-year university syllabi. It links to neighbouring topics Tusk shells, so understanding it makes those chapters shorter.
In everyday life: Look for Siphonodentalium 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.

How to study Siphonodentalium in 20 minutes

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

Frequently asked questions

What is Siphonodentalium in simple terms?

Siphonodentalium is a genus of small tusk shells in the family Gadilidae. Species Siphonodentalium australasiae Boissevain, 1906 Siphonodentalium booceras (Tomlin, 1926) Siphonodentalium colubridens (R.

Why does Siphonodentalium 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 Siphonodentalium?

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 Siphonodentalium.