biology

Spitidiscus

Spitidiscus 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 Spitidiscus rather than just read about it. In short: Spitidiscus is a genus of ammonites placed in the family Holcodiscidae. Species List of species within Spitidiscus: Spitidiscus hugii Spitidiscus kilapiae Rawson and Aguirre-Urreta, 2012 - Argentina Spitidiscus oregonensis Imlay, 1960 - Oregon Spitidiscus riccardii Leanza, and Wiedmann, 1992 - Argentina Spitidiscus rotulia - England Spitidiscus simitiensis Haas, 1960 - Colombia Spitidiscus vandeckii (d'Orbigny, 1847…

Key takeaways

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

Reference excerpt

Spitidiscus is a genus of ammonites placed in the family Holcodiscidae.

Species List of species within Spitidiscus:

Spitidiscus hugii Spitidiscus kilapiae Rawson and Aguirre-Urreta, 2012 - Argentina Spitidiscus oregonensis Imlay, 1960 - Oregon Spitidiscus riccardii Leanza, and Wiedmann, 1992 - Argentina Spitidiscus rotulia - England Spitidiscus simitiensis Haas, 1960 - Colombia Spitidiscus vandeckii (d'Orbigny, 1847)

Description Member species have a rather evolute shell in which the whorl section is more or less circular, venter broadly rounded and dorsum fairly deeply impressed. Close, fine low, single or rarely branching ribs are interspersed by frequent straight or slightly sinuous, moderately deep but wide constrictions. The type species S. rotulia is from the Hauterivian of England.

Biostratigraphic significance The first appearance of the species Spitidiscus hugii or Spitidiscus vandeckii are proposed to be the marker for the beginning of the Barremian.

Distribution Spitidiscus has been found in:

Agrio Formation, Argentina Magdalena Valley, Simití and Cáqueza, Colombia Kaliste Formation, Czech Republic France Gagra, Georgia, Caucasus Maiolica Formation, Italy Subbetics, Spain Foggy Creek, Oregon Bulgaria Portugal Russia Morocco Mexico

References

Bibliography "Spidiscus". Paleobiology Database. Retrieved 30 December 2021. "Spidiscus". Encyclopedia of Life (EOL). Retrieved 30 December 2021. Wright, Claud William; with John Hannes Callomon and M.K. Howarth (1996). Roger L. Kaesler (ed.). Mollusca 4 Revised, Cretaceous Ammonoidea in Treatise on Invertebrate Paleontology Part L. Boulder, Colorado and Lawrence, Kansas: The Geological Society of America & University of Kansas Press. p. 69.{{cite book}}: CS1 maint: multiple names: authors list (link) Arkell, W. J.; Furnish, W. M.; Kummel, Bernhard; Miller, A.K.; Moore, R.C.; Schindewolf, O.H. (1957). "Part L, Mollusca 4: Cephalopoda, Ammonoidea". In Raymond C. Moore (ed.). Treatise on Invertebrate Paleontology. Geological Society of America and University of Kansas Press. p. L371. ISBN 978-0-8137-3012-7 – via Internet Archive. {{cite book}}: ISBN / Date incompatibility (help)

Illustrations

Worked examples

Example 1 — a first encounter with Spitidiscus

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

In research: Spitidiscus 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 Spitidiscus 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: Spitidiscus is common in secondary-school and first-year university syllabi. It links to neighbouring topics Ammonites of Europe, Ammonites of North America, Ammonites of South America, so understanding it makes those chapters shorter.
In everyday life: Look for Spitidiscus 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 Spitidiscus in 20 minutes

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

Frequently asked questions

What is Spitidiscus in simple terms?

Spitidiscus is a genus of ammonites placed in the family Holcodiscidae. Species List of species within Spitidiscus: Spitidiscus hugii Spitidiscus kilapiae Rawson and Aguirre-Urreta, 2012 - Argentina Spitidiscus oregonensis Imlay, 1960 - Oregon Spitidiscus riccardii Leanza, and Wiedmann, 1992 - Arge…

Why does Spitidiscus 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 Spitidiscus?

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 Spitidiscus.