biology

Olcostephanus

Olcostephanus 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 Olcostephanus rather than just read about it. In short: Olcostephanus is an extinct ammonoid cephalopod genus belonging to the family Olcostephanidae. These fast-moving nektonic carnivores lived during the Cretaceous, from the upper Valanginian to the lower Hauterivian age.

Key takeaways

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

Reference excerpt

Olcostephanus is an extinct ammonoid cephalopod genus belonging to the family Olcostephanidae. These fast-moving nektonic carnivores lived during the Cretaceous, from the upper Valanginian to the lower Hauterivian age.

Species Source:

Olcostephanus astierianus (d'Orbigny, 1840) Olcostephanus atherstoni Sharpe, 1856 Olcostephanus bakeri Imlay, 1937 Olcostephanus bosei Riedel, 1938 Olcostephanus delicatecostatus Haas, 1960 Olcostephanus detonii Rodighiero 1919 Olcostephanus filifer Imlay, 1937 Olcostephanus laticosta Gerth, 1925 Olcostephanus paucicostatus Imlay, 1937 Olcostephanus pecki Imlay, 1960 Olcostephanus popenoei Imlay, 1960 Olcostephanus prorsiradiatus Imlay, 1937 Olcostephanus quadriradiatus Imlay, 1938 Olcostephanus sanlazarensis Imlay, 1937

Distribution Fossils of species within this genus have been found in the Cretaceous sediments of Antarctica, Argentina, Austria, Bulgaria, Chile, Colombia (Macanal Formation, Eastern Ranges), Czech Republic, France, Hungary, Italy, Mexico, Morocco, Poland, Portugal, Romania, Slovakia, South Africa, Spain, Russia, United States, as well as in the Jurassic of Argentina.

References

Bibliography Piraquive, Alejandro; Díaz, Juan Sebastián; Cuéllar, Tomas; Pardo, Germán; Kammer, Andreas (2011), "Reactivación Neógena de estructuras de rift del Cretácico Temprano asociadas con la Falla de Chámeza, Pajarito, Boyacá (Colombia): evidencias tectónicas y bioestratigráficas" (PDF), Geología Colombiana, 36: 197–216, archived from the original (PDF) on 2017-03-30, retrieved 2017-08-04 Wright C.W. with J.H. Callomon and M.K. Howarth (1996). "Mollusca 4 Revised: Cretaceous Ammonoidea". In Roger L. Kaesler (ed.). Treatise on Invertebrate Paleontology Part L. Vol. 4. Boulder, Colorado and Lawrence, Kansas: The Geological Society of America & University of Kansas Press. p. 46 – via Internet Archive.

Illustrations

Worked examples

Example 1 — a first encounter with Olcostephanus

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

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

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

Frequently asked questions

What is Olcostephanus in simple terms?

Why does Olcostephanus 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 Olcostephanus?

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 Olcostephanus.