biology

Ischioceratops

Ischioceratops 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 Ischioceratops rather than just read about it. In short: Ischioceratops (lit. 'ischium-horned face') is an extinct genus of small herbivorous ceratopsian dinosaur that lived approximately 77.3-73.5 million years ago during the latter part of the Cretaceous Period in what is now China. Ischioceratops was a small sized, moderately-built, ground-dwelling, quadrupedal herbivore, whose total body length has been estimated to be about 2 m (6.6 ft).

Key takeaways

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

Reference excerpt

Ischioceratops (lit. 'ischium-horned face') is an extinct genus of small herbivorous ceratopsian dinosaur that lived approximately 77.3-73.5 million years ago during the latter part of the Cretaceous Period in what is now China. Ischioceratops was a small sized, moderately-built, ground-dwelling, quadrupedal herbivore, whose total body length has been estimated to be about 2 m (6.6 ft). The ceratopsians were a group of dinosaurs with parrot-like beaks which fed on vegetation and thrived in North America and Asia during the Cretaceous Period, which ended approximately 66 million years ago, at which point they all became extinct. Its name means "ischium horned face", referring to the peculiar shape of the ischiatic bones. Ischioceratops existed in the Wangshi Group during the late Cretaceous. It lived alongside centrosaurines, saurolophines, and tyrannosaurines. The most common creatures in the formation were Sinoceratops and Zhuchengtyrannus.

Discovery and naming

In 2015, the type species Ischioceratops zhuchengensis was named and described by He Yiming, Peter J. Makovicky, Wang Kebai, Chen Shuqing, Corwin Sullivan, Han Fenglu and Xu Xing. The generic name combines a reference to the os ischii, its uniquely formed ischium, with ~ceratops, "horn face", a usual suffix in the names of Ceratopia. The suffix itself is derived from Greek keras, "horn", and ops, "face". The specific name refers to the provenance from Zhucheng. Because the name was published in an electronic publication, PLoS ONE, Life Science Identifiers were required for its validity. These were 19A423ED-8EAA -4842-9ECF-695876EC5EC0 for the genus and 71CD0FAE-070C-4CC4-96CC-B37D5B1071CE for the species. Ischioceratops was one of eighteen dinosaur taxa from 2015 to be described in open access or free-to-read journals.

The holotype ZCDM V0O016 was discovered in Kugou, a locality in the Shandong Province of China which presents layers of the Upper Cretaceous Wangshi Group, possibly dating from the late Campanian or earliest Maastrichtian. It is part of the Zhucheng Dinosaur Museum collection and it represents an incomplete, partially articulated specimen comprising the entire sacrum, a few ossified tendons, both halves of the pelvis, the anteriormost fifteen caudal vertebrae in an articulated series, and the right femur, tibia and fibula.

Description

Size and distinguishing traits

Ischioceratops was a relatively small ceratopsian, reaching 2 m (6.6 ft) in length. The describing authors indicated some distinguishing traits. The taxon has been referred to Leptoceratopsidae and is distinguished from other known leptoceratopsids based on the following combination of characters: nine sacral vertebrae, more than in any other known basal (non-ceratopsid) ceratopsian but fewer than in ceratopsids; the ischium has a robust shaft that resembles that of a recurved bow and flares gradually to form a subrectangular-shaped obturator process in its middle portion while an elliptical fenestra perforates the obturator process. This morphology, unique for the Dinosauria as a whole, was seen as a single autapomorphy, unique derived character.

Skeleton

Ischioceratops is one of the few ceratopsian dinosaurs which is not known by the skull. The most peculiar traits are located in the ischium. With most relatives the ischium shaft has a constant curvature to the rear. Another characteristic of Ischioceratops is the presence of an elevation in the proximal part of its tail, which is present also in Protoceratops, Koreaceratops and in a more similar way in Montanoceratops and Cerasinops. The elevation forms a tail crest.

Classification

Phylogenetic analyzes confirmed Ischioceratops as a leptoceratopsid. Its closest relative taxon or sister species was Montanoceratops. The following cladogram is based on an analysis in the describing paper of 2015.

Illustrations

Worked examples

Example 1 — a first encounter with Ischioceratops

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

In research: Ischioceratops 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 Ischioceratops 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: Ischioceratops 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 Ischioceratops 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 Ischioceratops in 20 minutes

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

Frequently asked questions

What is Ischioceratops in simple terms?

Why does Ischioceratops 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 Ischioceratops?

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 Ischioceratops.