biology

Puppigerus

Puppigerus 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 Puppigerus rather than just read about it. In short: Puppigerus is an extinct genus of sea turtle from the Eocene. It is known from finds in the United States, the United Kingdom, Belgium, Denmark, and Uzbekistan.

Key takeaways

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

Reference excerpt

Puppigerus is an extinct genus of sea turtle from the Eocene. It is known from finds in the United States, the United Kingdom, Belgium, Denmark, and Uzbekistan.

Taxonomy Puppigerus was described by Edward Drinker Cope in 1870. As of 1997, P. camperi and P. crassicostata were considered the two valid species. In 2005 P. nessovi was discovered in Uzbekistan.

Description Fossils show that Puppigerus was around 90 cm (35 in) long, and its weight has been estimated as being somewhere around 9–14 kg (20–31 lb). Although cheloniids such as Puppigerus first appeared during the Cretaceous, several traits of this genus give it more of a resemblance to modern cheloniids: its "huge" eyes pointed sideways rather than upward, unlike more primitive cheloniids, and its shell was completely ossified. The pygal (rearmost plate of the upper shell) also lacked the notch seen in earlier cheloniids. It was a herbivore, living on marine vegetation, and one of the "best-adapted" prehistoric turtles; its "unusually large" eyes helped it gather as much light as possible, and its specialized jaw structure kept it from accidentally breathing in water. Its front legs were flipper-like, but its hind legs were not developed in this manner, suggesting it would have spent considerable time on dry land, where females would have laid their eggs.

Palaeoecology Puppigerus camperi is known from the London Clay and Bracklesham Beds of England, as well as the Sables de Bruxelles and the Sables de Wemmel of Belgium. P. nessovi is known from the Dzheroi 2 locality of Uzbekistan. A Puppigerus species is also known from the Fur Formation of Denmark.

References

Illustrations

Worked examples

Example 1 — a first encounter with Puppigerus

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

In research: Puppigerus 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 Puppigerus 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: Puppigerus is common in secondary-school and first-year university syllabi. It links to neighbouring topics Cenozoic turtles of North America, Cheloniidae, Eocene reptiles, so understanding it makes those chapters shorter.
In everyday life: Look for Puppigerus 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 Puppigerus in 20 minutes

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

Frequently asked questions

What is Puppigerus in simple terms?

Puppigerus is an extinct genus of sea turtle from the Eocene. It is known from finds in the United States, the United Kingdom, Belgium, Denmark, and Uzbekistan.

Why does Puppigerus 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 Puppigerus?

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 Puppigerus.