biology

Pristichampsus

Pristichampsus 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 Pristichampsus rather than just read about it. In short: Pristichampsus (from Greek: πρῐ́στῐς prístis, 'saw' and Greek: χαμψαι champsai, 'crocodile') is a non-diagnostic and potentially dubious extinct genus of crocodylian from France and possibly also Kazakhstan that is part of the monotypic Pristichampsidae family. As the type species, Pristichampsus rollinatii, was based on insufficient material when described in 1831 and 1853, the taxonomic status of the genus is in d…

Key takeaways

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

Reference excerpt

Pristichampsus (from Greek: πρῐ́στῐς prístis, 'saw' and Greek: χαμψαι champsai, 'crocodile') is a non-diagnostic and potentially dubious extinct genus of crocodylian from France and possibly also Kazakhstan that is part of the monotypic Pristichampsidae family. As the type species, Pristichampsus rollinatii, was based on insufficient material when described in 1831 and 1853, the taxonomic status of the genus is in doubt, and other species have been referred to other genera, primarily Boverisuchus.

History

Pristichampsus was first described and named as a species of Crocodylus, C. rollinatii, by John Edward Gray in 1831 on the basis of remains from the Lutetian Sables du Castrais Formation of France. Paul Gervais (1853) assigned this species to its own genus, creating the new combination Pristichampsus rollinatii. Other species have been referred to this genus. The genera Boverisuchus and Weigeltisuchus from the Lutetian of Germany as well as Limnosaurus from North America were synonymized with Pristichampsus and their type species were reassigned to it. Langston (1975) found Limnosaurus to be based on non-diagnostic remains, and therefore considered it to be in its own genus, as a nomen dubium. He also reassigned Crocodylus vorax from the Lutetian of Wyoming and West Texas to Pristichampsus. Efimov (1988) named two additional species of Pristichampsus, P. birjukovi and P. kuznetzovi from the Middle Eocene of Eastern Kazakhstan. Following a revision of the genus Pristichampsus by Brochu (2013), P. rollinatii was found to be based on insufficiently diagnostic material and therefore is a nomen dubium. Boverisuchus was reinstated as a valid genus, and the species Weigeltisuchus geiseltalensis was considered to be synonymous with B. magnifrons. Brochu (2013) also reassigned P. vorax as the second species of Boverisuchus. According to Brochu (2013), material from the middle Eocene of Italy and Texas may represent other species of Boverisuchus.

References

Illustrations

Worked examples

Example 1 — a first encounter with Pristichampsus

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

In research: Pristichampsus 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 Pristichampsus 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: Pristichampsus is common in secondary-school and first-year university syllabi. It links to neighbouring topics Crocodilia, Eocene crocodylomorphs, Eocene reptiles of Asia, so understanding it makes those chapters shorter.
In everyday life: Look for Pristichampsus 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 Pristichampsus in 20 minutes

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

Frequently asked questions

What is Pristichampsus in simple terms?

Why does Pristichampsus 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 Pristichampsus?

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 Pristichampsus.