biology

Sundabarbus

Sundabarbus 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 Sundabarbus rather than just read about it. In short: Sundabarbus is a genus of barbinae that lived in Sangkarewang Formation, Sumatra during the Eocene epoch. It was first described as Barbus megacephalus in 1876 and reclassified to its own genus in 2019.

Key takeaways

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

Reference excerpt

Sundabarbus is a genus of barbinae that lived in Sangkarewang Formation, Sumatra during the Eocene epoch. It was first described as Barbus megacephalus in 1876 and reclassified to its own genus in 2019. Although there were several specimens that had been found previously, only one fossil which is the holotype survive and stored in Natural History Museum. Based on the surviving specimen, Sundabarbus was a large fish reaching 50 cm in standard length. The head, similar to other Sangkarewang cyprinid, is proportionally large taking up to 39% of its standard length (hence the species name). Sundabarbus head is said to be as deep as the greatest body depth with no barbel trace. From the preserved mouth part, it can be inferred that they have a more dorsally oriented mouth. The operculum is as wide as it is tall. On the dorsal half of the posterior edge opercle, there are four or five ridges projecting posteriorly as small spines. Moving to the body part, its dorsal fin is located closer to the posterior part of the head than to the caudal fin. Preserved tail part show that the caudal fin is forked. It is worth mentioning that Murray (2019) considered Sundabarbus as one of the oldest cyprinid ever found if the surrounding depost age are indeed Eocene age. With other cyprinid from same location such as Padangia, they are probably the earliest confirmed cyprinid beside other genera from China such as Palaeogobio

References

Illustrations

Worked examples

Example 1 — a first encounter with Sundabarbus

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

In research: Sundabarbus 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 Sundabarbus 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: Sundabarbus is common in secondary-school and first-year university syllabi. It links to neighbouring topics Barbinae, Cypriniformes genera, Fossils of Indonesia, so understanding it makes those chapters shorter.
In everyday life: Look for Sundabarbus 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 Sundabarbus in 20 minutes

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

Frequently asked questions

What is Sundabarbus in simple terms?

Why does Sundabarbus 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 Sundabarbus?

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 Sundabarbus.