biology

Smitanosaurus

Smitanosaurus 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 Smitanosaurus rather than just read about it. In short: Smitanosaurus (meaning "smith lizard") is a genus of dicraeosaurid sauropod dinosaur from the Late Jurassic of Colorado. The genus contains one species, S. agilis, originally assigned to the defunct genus Morosaurus.

Key takeaways

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

Reference excerpt

Smitanosaurus (meaning "smith lizard") is a genus of dicraeosaurid sauropod dinosaur from the Late Jurassic of Colorado. The genus contains one species, S. agilis, originally assigned to the defunct genus Morosaurus.

History The species Morosaurus agilis was originally named by Othniel Charles Marsh in 1889 for a partial skull, proatlases, and three cervical vertebrae found in 1883 in the Morrison Formation of Colorado. However, the genus Morosaurus was in 1907 reinterpreted as a junior synonym of Camarasaurus, and most of the species assigned to the former genus were reassigned to the latter. M. agilis, on the other hand, was left defunct without a proper generic assignment. Over time comparisons have been drawn with Haplocanthosaurus, Diplodocus and brachiosaurids, but never with a phylogenetic analysis. Further preparation and analysis by Whitlock & Wilson, 2020, have since reinterpreted it as a dicraeosaurid, warranting the new genus name Smitanosaurus. The new generic name means "smith lizard", from the Old Saxon smitan, referring to J. August Smith, who excavated and sketched the holotype USNM 5384, as well as the Smithsonian Institution, where the remains are stored.

Classification Whitlock & Wilson's redescription marks the first time S. agilis has been added to a phylogenetic analysis. They recovered it as a member of Dicraeosauridae, making it one of the ever-growing number of North American dicraeosaurids. Their cladogram is shown below:

References

Illustrations

Worked examples

Example 1 — a first encounter with Smitanosaurus

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

In research: Smitanosaurus 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 Smitanosaurus 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: Smitanosaurus is common in secondary-school and first-year university syllabi. It links to neighbouring topics Dicraeosauridae, Dinosaur genera, Dinosaurs of the Morrison Formation, so understanding it makes those chapters shorter.
In everyday life: Look for Smitanosaurus 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 Smitanosaurus in 20 minutes

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

Frequently asked questions

What is Smitanosaurus in simple terms?

Why does Smitanosaurus 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 Smitanosaurus?

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 Smitanosaurus.