science

Nothrotherium

Nothrotherium 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 Nothrotherium rather than just read about it. In short: Nothrotherium is an extinct genus of medium-sized ground sloth from South America (Bolivia, Brazil and the Ware Formation, La Guajira, Colombia). It differs from Nothrotheriops in smaller size and differences in skull and hind leg bones.

Key takeaways

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

Reference excerpt

Nothrotherium is an extinct genus of medium-sized ground sloth from South America (Bolivia, Brazil and the Ware Formation, La Guajira, Colombia). It differs from Nothrotheriops in smaller size and differences in skull and hind leg bones.

Taxonomy Nothrotherium is derived from the Greek nothros [νωθρός], meaning "lazy" or "slothful," and therion [θηρίον], "beast", and the type species N. maquinense is named after the Maquiné Grotto in Brazil, where it was found. Synonyms such as Coelodon occasionally cause confusion where they occur in early texts such as that of Alfred Russel Wallace's major work, The Geographical Distribution of Animals (1876). This genus formerly included the species Nothrotheriops shastensis, which was later moved to Nothrotheriops.

Palaeobiology

Palaeoecology Analysis of δ13C values of N. maquinense remains suggests that they were specialists feeding predominantly on C3 vegetation. Analysis of a coprolite associated with a N. maquinense skeleton in Brazil's Gruta dos Brejoes show it to have been a browser which fed on xerophytic leaves and fruits, and it is sometimes thought to have been an inhabitant of open, peripheral forests, possibly having a semi-arboreal lifestyle, like the contemporaneous Cuban ground sloths and Diabolotherium.

Palaeopathology Based on a fossil find from Lapa dos Peixes I, the species N. maquinense is known to have suffered from calcium pyrophosphate deposition disease.

Extinction Plant material in the Gruta dos Brejoes coprolite yielded a date of 12,200 ± 120 yr BP, indicating that it survived long enough to encounter the first humans in South America and that it went extinct as part of the Late Pleistocene extinction event.

References

Bibliography Amson, Eli; Carrillo, Juan D.; Jaramillo, Carlos (2016), "Neogene sloth assemblages (Mammalia, Pilosa) of the Cocinetas Basin (La Guajira, Colombia): Implications for the Great American Biotic Interchange" (PDF), Palaeontology: 1–20, retrieved 2017-03-31

Further reading Classification of Mammals by Malcolm C. McKenna and Susan K. Bell

Illustrations

Worked examples

Example 1 — a first encounter with Nothrotherium

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

In research: Nothrotherium 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 Nothrotherium 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: Nothrotherium is common in secondary-school and first-year university syllabi. It links to neighbouring topics Ensenadan, Fossil taxa described in 1889, Fossils of Bolivia, so understanding it makes those chapters shorter.
In everyday life: Look for Nothrotherium 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 Nothrotherium in 20 minutes

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

Frequently asked questions

What is Nothrotherium in simple terms?

Why does Nothrotherium 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 Nothrotherium?

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 Nothrotherium.