science

Procynosuchus

Procynosuchus is a science 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 Procynosuchus rather than just read about it. In short: Procynosuchus (Greek: "Before dog crocodile" or "raccoon crocodile") is an extinct genus of cynodonts from the Late Permian. It is considered to be one of the earliest and most basal cynodonts.

Key takeaways

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

Reference excerpt

Procynosuchus (Greek: "Before dog crocodile" or "raccoon crocodile") is an extinct genus of cynodonts from the Late Permian. It is considered to be one of the earliest and most basal cynodonts. It was 60 cm (2 ft) long. Remains of Procynosuchus have been found in Russia, Germany, Zambia and South Africa.

Paleobiology

As one of the earliest cynodonts, Procynosuchus has many primitive features, but it also has features that distinguish it from all other early therapsids. Some of these features were interpreted by Kemp (1980) as adaptations for a semi-aquatic lifestyle. For example, the wide zygapophyses of the vertebrae allow for a high degree of lateral flexibility, and Procynosuchus may have used anguilliform locomotion, or eel-like undulation, to swim through the water. The tail of Procynosuchus is also unusually long for a cynodont. The long haemal arches would have given the tail a large lateral surface area for greater propulsion through the water. Relatively flat foot bones may also have been an adaptation toward swimming, as the feet may have been used like paddles. Ridges on the femur are an indication of strong flexor muscles that could have stabilized the leg during limb-driven swimming. When the thigh is pulled back in the water, the lower leg tends to bend forward. Strong flexor muscles would have pulled the lower leg back with the femur, providing the powerful backward thrust that is needed to swim.

Discovery Procynosuchus was named by South African paleontologist Robert Broom in 1937. Broom also named the cynodont Cyrbasiodon in 1931. Another genus, Parathrinaxodon, was named by Parrington in 1936. These genera are now regarded as synonyms of Procynosuchus, as they represent the same animal. Under the International Code of Zoological Nomenclature (ICZN), these two names take precedence over Procynosuchus because they were erected earlier. The names Cyrbasiodon and Parathrinaxodon were rarely used after their erection, while the name Procynosuchus has since become widespread in scientific literature. In a case brought to the ICZN in 2009, some scientists proposed that Procynosuchus should be a nomen conservandum, or conserved name, making Cyrbasiodon and Parathrinaxodon nomina rejecta, or rejected names. In 2010, the ICZN formally made Procynosuchus a nomen conservandum.

References

External links Cynodontia Procynosuchidae

Illustrations

Worked examples

Example 1 — a first encounter with Procynosuchus

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

In research: Procynosuchus 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 Procynosuchus 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: Procynosuchus is common in secondary-school and first-year university syllabi. It links to neighbouring topics Cynodontia, Fossil taxa described in 1937, Fossils of Germany, so understanding it makes those chapters shorter.
In everyday life: Look for Procynosuchus 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 Procynosuchus in 20 minutes

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

Frequently asked questions

What is Procynosuchus in simple terms?

Procynosuchus (Greek: "Before dog crocodile" or "raccoon crocodile") is an extinct genus of cynodonts from the Late Permian. It is considered to be one of the earliest and most basal cynodonts.

Why does Procynosuchus 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 Procynosuchus?

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 Procynosuchus.