biology

Hippodraco

Hippodraco 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 Hippodraco rather than just read about it. In short: Hippodraco is a genus of iguanodontian ornithopod dinosaur from the Early Cretaceous Cedar Mountain Formation of Utah, United States. The genus contains a single species, H. scutodens, known from a partial skeleton belonging to an immature individual.

Key takeaways

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

Reference excerpt

Hippodraco is a genus of iguanodontian ornithopod dinosaur from the Early Cretaceous Cedar Mountain Formation of Utah, United States. The genus contains a single species, H. scutodens, known from a partial skeleton belonging to an immature individual.

Discovery The holotype of Hippodraco, UMNH VP 20208, was discovered in 2004 by Andrew R. C. Milner. It is a fragmentary specimen including a fragmented skull and dentary teeth, vertebrae (dorsal, caudal and cervical), a right humerus, a right scapula, a left ischium, a right tibia, a right femur, and left metatarsals. It was later named in 2010 by Andrew T. McDonald, James I. Kirkland, Andrew R. C. Milner, Scott K. Madsen, Donald D. DeBlieux, Jennifer Cavin and Lukas Panzarin. The generic name Hippodraco is a combination of the Greek word hippos ("horse") and the Latin word draco ("dragon"). It refers to the elongated shape of the skull, which resembles a horse skull. The specific name scutodens is a combination of the Latin words scutum (meaning shield) and dens (meaning tooth), and it references the shield-shaped dentary tooth crowns. UMNH VP 20208 was unearthed from the Yellow Cat Member of the Cedar Mountain Formation, Utah, at a site known as Andrew's Site, dating from the Valanginian stage in the Early Cretaceous period.

Description

Hippodraco is a relatively small iguanodontid, with the holotype reaching 4.5 m (15 ft) in length. Holtz estimated its weight between 227 to 454 kg (500.4 to 1,000.9 lb). However, a large orbital in the skull indicates that the specimen is immature. The left side of the skull is well preserved, although the right side is very fragmented. The left dentary is preserved on the skull along with teeth, which, have shield-shaped crowns. The lacrimal bone closely resembles those of Dakotadon and Theiophytalia.

Vertebrae indicates a characteristic iguanodont body shape. Most of the body remains are gracile, such as the right humerus and scapula, the right tibia and femur are fragmented, having irregular surfaces. The nearly-complete metatarsus is very similar to those of Camptosaurus and Iguanodon.

Classification

In 2010 and 2011 cladistic analyses of McDonald and colleagues, Hippodraco has been recovered as a basal member of the Styracosterna and its closest relative was Theiophytalia.

Paleoenvironment

The holotype of Hippodraco was unearthed from the Upper Yellow Cat Member of the Cedar Mountain Formation. Contemporaneous fauna from the Upper Yellow Cat include the fellow ornithopod Cedrorestes, sauropods (Cedarosaurus and Moabosaurus), theropods (Martharaptor and Nedcolbertia), the nodosaurid Gastonia, and the giant dromaeosaurid Utahraptor. Other dromaeosaurids with fragmentary remains are also known from the formation: an indeterminate eudromaeosaur (UMNH VP 20209) and an indeterminate velociraptorine (UMNH VP 21752).

References

Illustrations

Worked examples

Example 1 — a first encounter with Hippodraco

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

In research: Hippodraco 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 Hippodraco 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: Hippodraco is common in secondary-school and first-year university syllabi. It links to neighbouring topics Ankylopollexia, Cedar Mountain Formation, Dinosaur genera, so understanding it makes those chapters shorter.
In everyday life: Look for Hippodraco 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 Hippodraco in 20 minutes

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

Frequently asked questions

What is Hippodraco in simple terms?

Why does Hippodraco 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 Hippodraco?

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 Hippodraco.