biology

Zaraasuchus

Zaraasuchus 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 Zaraasuchus rather than just read about it. In short: Zaraasuchus ("hedgehog crocodile") is a gobiosuchid crocodyliform described in 2004 by Diego Pol and Mark Norell. It was found in the Red Beds of Zos Canyon, in the Gobi Desert of Mongolia, thus making it Late Cretaceous in age.

Key takeaways

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

Reference excerpt

Zaraasuchus ("hedgehog crocodile") is a gobiosuchid crocodyliform described in 2004 by Diego Pol and Mark Norell. It was found in the Red Beds of Zos Canyon, in the Gobi Desert of Mongolia, thus making it Late Cretaceous in age. The type species is Z. shepardi, honouring Dr. Richard Shepard.

Description The holotype of Z. shepardi is IGM 100/1321, consisting of the posterior region of the skull and lower jaws in articulation with cervical vertebrae, forelimb elements and osteoderms. The skull was relatively wide, with the upper temporal fenestrae of the skull being completely closed off by the surrounding squamosal and parietal bones (characteristic of Gobiosuchids). It possessed highly developed osteoderms, with 4 rows of dorsal osteoderms laterally sutured to each other, each one with a sharp, pronounced spike and several rugose ridges. The cervical ventral osteoderms were disarticulated, but these were likely sutured laterally with the dorsal osteoderms to complete a concentric "ring" of armor around the neck, presumably the torso, and tail (as seen in Gobiosuchus). The holotype preserves an incomplete forelimb, these were long and gracile.

Systematics Pol and Norell (2004) found Zaraasuchus shepardi to be the sister taxon of Gobiosuchus kielanae, united by 14 synapomorphies, primarily from the skull, forming the family Gobiosuchidae.

Sources Pol, D. & Norell, M. A., (2004). "A new gobiosuchid crocodyliform taxon from the Cretaceous of Mongolia". American Museum Novitates 3458: 1-31.

Illustrations

Worked examples

Example 1 — a first encounter with Zaraasuchus

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

In research: Zaraasuchus 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 Zaraasuchus 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: Zaraasuchus is common in secondary-school and first-year university syllabi. It links to neighbouring topics Crocodyliformes, Fossils of Mongolia, Late Cretaceous crocodylomorphs of Asia, so understanding it makes those chapters shorter.
In everyday life: Look for Zaraasuchus 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 Zaraasuchus in 20 minutes

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

Frequently asked questions

What is Zaraasuchus in simple terms?

Why does Zaraasuchus 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 Zaraasuchus?

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 Zaraasuchus.