biology

Nuthetes

Nuthetes 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 Nuthetes rather than just read about it. In short: Nuthetes is a genus of coelurosaurian theropod dinosaur, either a dromaeosaurid or tyrannosauroid, known only from fossil teeth and jaw fragments found in rocks of the middle Berriasian age (Early Cretaceous) in the Cherty Freshwater Member of the Lulworth Formation in England and also the Angeac-Charente bonebed in France. If it was a dromaeosaurid, Nuthetes would have been a small predator.

Key takeaways

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

Reference excerpt

Nuthetes is a genus of coelurosaurian theropod dinosaur, either a dromaeosaurid or tyrannosauroid, known only from fossil teeth and jaw fragments found in rocks of the middle Berriasian age (Early Cretaceous) in the Cherty Freshwater Member of the Lulworth Formation in England and also the Angeac-Charente bonebed in France. If it was a dromaeosaurid, Nuthetes would have been a small predator.

Discovery and naming

The holotype, DORCM G 913, was collected by Charles Willcox, an amateur paleontologist living at Swanage, from the Feather Quarry near Durlston Bay in a marine deposition of Cherty Freshwater Member of the Lulworth Formation, dating from the middle Berriasian. It consists of an about three inch long left dentary fragment with nine teeth. The holotype was once thought to be lost but was rediscovered during the 1970s in the Dorset County Museum. Later several other teeth and specimen BMNH 48207, another dentary fragment from a somewhat smaller individual, were referred to the species. Owen in 1878 also assumed some fossilised scutes, of a type for which he coined the name "granicones", belonged to Nuthetes but these were in 2002 shown to be limb or tail osteoderms of a turtle, possibly "Helochelydra" anglica or "H." bakewelli. In 2006 a tooth from France found at the Berriasian aged Cherves-de-Cognac locality, specimen CHEm03.537, was referred to a Nuthetes sp. Some large specimens referred to Nuthetes may instead belong to Dromaeosauroides. Additional teeth have been attributed to Nuthetes from the nearby Angeac-Charente bonebed in western France. The genus Nuthetes contains one species (the type species), Nuthetes destructor. N. destructor was named and described by Richard Owen in 1854. The generic name Nuthetes is derived from the Koine Greek nouthetes, a contraction of νουθέτητης (nouthetetes) meaning "one who admonishes" or "a monitor," in reference to the similarity of Nuthetes teeth to those of a modern monitor lizard. The specific name is Latin for "destroyer", a reference to "the adaptations of the teeth for piercing, cutting, and lacerating the prey" of a form he estimated to be equal in size to the present Bengal monitor.

Classification Nuthetes was originally classified by Owen as a lizard and a varanid; later he changed his mind concluding it was a crocodilian. Only in 1888 Richard Lydekker did understand it was a dinosaur. In 1934 William Elgin Swinton thought it was a juvenile member of the Megalosauridae. In 1970 Rodney Steel even renamed the species Megalosaurus destructor. In 2002 however, a re-examination of the fossils by paleontologist Angela Milner showed that they most likely belonged to a subadult dromaeosaurid. Steve Sweetman examined five good specimens of fossil teeth and confirmed that they belong to Nuthetes destructor, and concluded that this species is a velociraptorine dromaeosaurid. If this placement is correct, it would have been one of the oldest dromaeosaurids known, the first to be described, and the first known from Britain. However, Rauhut, Milner and Moore-Fay (2010) pointed out the great similarity of the teeth of basal tyrannosauroid Proceratosaurus to the teeth of velociraptorine dromaeosaurids. The authors recommended caution when referring to isolated teeth from the Late Jurassic or Early Cretaceous to the Dromaeosauridae (explicitly citing Milner's 2002 study and Sweetman's 2004 study as examples of studies that identified isolated theropod teeth as belonging to dromaeosaurids), as these teeth might belong to proceratosaurid tyrannosauroids instead. According to Milner, Nuthetes can be diagnosed for having a tooth denticle size difference index ranging from 1-14 to 1-55.

Illustrations

Worked examples

Example 1 — a first encounter with Nuthetes

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

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

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

Frequently asked questions

What is Nuthetes in simple terms?

Why does Nuthetes 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 Nuthetes?

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 Nuthetes.