biology

Huanansaurus

Huanansaurus 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 Huanansaurus rather than just read about it. In short: Huanansaurus is an extinct genus of oviraptorid dinosaur that lived approximately 72 million years ago, between the Campanian and Maastrichtian, during the latter part of the Cretaceous period in what is now China, in the Nanxiong Formation. Discovery and designation The skeleton of a new oviraptorid Huanansaurus ganzhouensis was uncovered during the construction of the Ganzhou railway station in Jiangxi province, C…

Key takeaways

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

Reference excerpt

Huanansaurus is an extinct genus of oviraptorid dinosaur that lived approximately 72 million years ago, between the Campanian and Maastrichtian, during the latter part of the Cretaceous period in what is now China, in the Nanxiong Formation.

Discovery and designation The skeleton of a new oviraptorid Huanansaurus ganzhouensis was uncovered during the construction of the Ganzhou railway station in Jiangxi province, China.

In 2015, Lü Junchang, Pu Hanyong, Yoshitsugu Kobayashi, Xu Li, Chang Huali, Shang Yuhua, Liu Di, Lee Yuong-Nam, Martin Kundrát and Shen Caizhi named and described the type species Huanansaurus ganzhouensis. The generic name is derived from Huanan, "Southern China". The specific name refers to the provenance from Ganzhou. Huanansaurus was one of eighteen dinosaur taxa from 2015 to be described in open access or free-to-read journals. The holotype, HGM41HIII-0443, was found in a layer of the Nanxiong Formation dating from the Campanian - Maastrichtian. It consists of a partially articulated, incomplete skeleton which includes a nearly complete skull and lower jaws, the first seven neck vertebrae, a humerus, ulna, radius and hand of the right arm, the left hand, the lower part of the right thighbone, the upper part of the right shinbone, and the distal parts of the right foot. The specimen is part of the collection of the Henan Geological Museum at Zhengzhou. In 2026, Hao and Xu assigned IVPP V34154, probably from the Tangbian Formation, to Huanansaurus and suggested that Corythoraptor is a junior synonym of the former. The specimen was donated to the Institute of Vertebrate Paleontology and Paleoanthropology and preserved an individual situated on top of a nest.

Description

Some unique traits of Huanansaurus have been established. Several of these are autapomorphies. Of the quadrate bone the lower condyles are positioned behind the upper head. The transverse nuchal crest on the rear skull roof is not very prominent. In the lower jaw the angular bone forms a major part of the lower rim of the outer side opening. The front point of the lower jaw is obliquely protruding to above under an angle of less than 45° with the symphysis, the fused point of the lower jaws. The shelf formed by the symphysis is moderately large, equal to about a fifth to a fourth of the total jaw length. The dentary bone is pneumatised. The lower rear branch of the dentary is twisted, causing its outer side to be somewhat directed to below. The first metacarpal is long and slender with its transverse width equal to a fifth of its length. The hand claws have prominent lips on their upper rears. In addition, a unique combination of in themselves not unique traits is present. The temporal opening on the skull roof is round and much smaller than the temporal opening of the skull side. The rear branch of the praemaxilla touches the lacrimal bone and features a prominent opening at this point, on the rear underside. The upper rear branch of the dentary covers the outer side opening of the lower jaw and has a concave lower rim. Huanansaurus was, within the Oviraptoridae, placed in the Oviraptorinae, as a sister species of Citipati. Below is a cladogram of Oviraptoridae based on the phylogenetic analysis of Lü et al. (2017).

Illustrations

Worked examples

Example 1 — a first encounter with Huanansaurus

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

In research: Huanansaurus 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 Huanansaurus 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: Huanansaurus is common in secondary-school and first-year university syllabi. It links to neighbouring topics Dinosaur genera, Dinosaurs of China, Fossil taxa described in 2015, so understanding it makes those chapters shorter.
In everyday life: Look for Huanansaurus 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 Huanansaurus in 20 minutes

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

Frequently asked questions

What is Huanansaurus in simple terms?

Why does Huanansaurus 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 Huanansaurus?

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 Huanansaurus.