science

Umbellaoolithus

Umbellaoolithus 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 Umbellaoolithus rather than just read about it. In short: Umbellaoolithus is an oogenus of dinosaur eggs found in the early Upper Cretaceous in Southern China. Description The eggs are oval-shaped and measure on average 13.86 cm (5.46 in) long by 10.43 cm (4.11 in) wide.

Key takeaways

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

Reference excerpt

Umbellaoolithus is an oogenus of dinosaur eggs found in the early Upper Cretaceous in Southern China.

Description The eggs are oval-shaped and measure on average 13.86 cm (5.46 in) long by 10.43 cm (4.11 in) wide. The eggshell is thin (average thickness: 0.75 mm (0.030 in)) and its outer surface is smooth. The shell units (the microscopic discrete crystal structures which make up all hard eggshells) have a distinctive microstructure. The cone layer is relatively thin, making up only 1/6 of the eggshell, with the rest comprised of the columnar layer. The shell units are irregularly shaped, with a mix of umbrella-shaped, triangular-shaped, and conical units. Sometimes two or three of these units are fused together. The pores are irregularly shaped and unevenly distributed within the eggshell. The sole preserved clutch is incomplete, but contained at least nine eggs, placed with uneven spacing and depth in the ground, contrasting the regular circular nests characteristic of Elongatoolithidae. While incomplete, the arrangement of the eggs appears to have been unaltered in preservation, and the eggs were all laid with their long axes pointing in the same direction.

Classification Because parentage of fossil eggs is usually unknown, they are classified by their own parataxonomic system of oofamilies, oogenera, and oospecies. The oogenus Umbellaoolithus contains a single oospecies, Umbellaoolithus xiuningensis, and is the sole oospecies in the oofamily Umbellaoolithidae. Among other oofamilies, they show the most similarity to Similifaveoloolithidae.

Discovery and naming The eggs now classified as Umbellaoolithus were discovered by accident during a 2011 construction project in Xiuning County in Anhui Province of southern China. At this time, workers discovered two fossilized dinosaur nests, which were transferred to local governing authorities. One of these, now housed at the Anhui Geological Museum, was analyzed in detail by a team of Chinese paleontologists lead by Huang Jiandong of the Anhui Geological Museum, who determined on the basis of its unique microstructural traits that they belonged to a previously unrecognized oofamily. In 2017, Huang et al. gave this specimen the name Umbellaoolithus xiuningensis and erected a new oofamily, Umeballaoolithidae, for it. The name is derived from the Latin umbella meaning "umbrella" in reference to the distinctive umbrella-shaped shell units. The suffix -oolithus, Greek for "stone egg", is traditional for ootaxa. The specific epiphet "xiuningensis" refers to the location of discovery. The Chinese name of Umbellaoolithus xiuningensis is 休宁伞形蛋, which similarly translates to "Xiuning umbrella-shaped egg".

Paleobiology The identity of the parent of Umbellaoolithus is unknown. Isotope analysis of the carbon and oxygen preserved in the eggshell suggests that the parent fed on C3 plants, and inhabited a warm and dry environment. Sedimentary analysis shows that the nest was laid in a floodplain. Therefore, it is believed that these eggs were laid in the floodplain of a river in an arid or semi-arid environment. The nests seem to have been buried in the ground.

Distribution Umbellaoolithus is known from the uppermost portion of the Huizhou Formation in Anhui, China. It is found at the same site as Similifaveoloolithus qiyunshanensis, another type of dinosaur egg. This site is dated to the early Late Cretaceous (Cenomanian-Turonian). This formation is notable for discoveries not only of fossil eggs, but also fossil footprints (including Xiuningpus and Qiyunshanpus), and dinosaur skeletal remains (including the pachycephalosaur Wannanosaurus).

References

Illustrations

Worked examples

Example 1 — a first encounter with Umbellaoolithus

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

In research: Umbellaoolithus 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 Umbellaoolithus 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: Umbellaoolithus is common in secondary-school and first-year university syllabi. It links to neighbouring topics Cenomanian dinosaurs, Dinosaur eggs, Fossil parataxa described in 2017, so understanding it makes those chapters shorter.
In everyday life: Look for Umbellaoolithus 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 Umbellaoolithus in 20 minutes

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

Frequently asked questions

What is Umbellaoolithus in simple terms?

Umbellaoolithus is an oogenus of dinosaur eggs found in the early Upper Cretaceous in Southern China. Description The eggs are oval-shaped and measure on average 13.86 cm (5.46 in) long by 10.43 cm (4.11 in) wide.

Why does Umbellaoolithus 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 Umbellaoolithus?

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 Umbellaoolithus.