biology

Steatocranus

Steatocranus 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 Steatocranus rather than just read about it. In short: Steatocranus is a genus of small rheophilic cichlids mostly native to the Congo River Basin in DR Congo/Congo Brazzaville, although one species, S. irvinei, is restricted to the Volta River in Ghana and Burkino Faso, and it belongs in a separate genus. There are also at least c. 10 undescribed species in the Congo River basin awaiting scientific description.

Key takeaways

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

Reference excerpt

Steatocranus is a genus of small rheophilic cichlids mostly native to the Congo River Basin in DR Congo/Congo Brazzaville, although one species, S. irvinei, is restricted to the Volta River in Ghana and Burkino Faso, and it belongs in a separate genus. There are also at least c. 10 undescribed species in the Congo River basin awaiting scientific description. The fish in this genus all have relatively reduced swim bladder function. The name Steatocranus refers to the fatty deposit on the forehead of most species.

Two species, S. casuarius (also known as the lionhead or buffalohead cichlid) and S. tinanti are relatively common in the aquarium trade. As for other cichlids brood care is highly developed and both sexes are involved in raising the young. All Steatocranus species are secretive cave spawners and form monogamous pairs for breeding. The female is more actively involved in fry raising, while the male is primarily concerned with territorial defence.

Species

There are currently eight recognized species in this genus, but S. irvinei belongs elsewhere; in 2019 it was proposed to move it to its own genus, Paragobiocichla.

Steatocranus bleheri M. K. Meyer, 1993 Steatocranus casuarius Poll, 1939 (Lionhead cichlid) Steatocranus gibbiceps Boulenger, 1899 Steatocranus glaber T. R. Roberts & D. J. Stewart, 1976 Steatocranus masalamasoso Zamba, Weiss, Mamonekene, Schliewen & Vreven, 2022 Steatocranus mpozoensis T. R. Roberts & D. J. Stewart, 1976 Steatocranus rouxi (Pellegrin, 1928) Steatocranus tinanti (Poll, 1939) Steatocranus ubanguiensis T. R. Roberts & D. J. Stewart, 1976

References

Illustrations

Worked examples

Example 1 — a first encounter with Steatocranus

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

In research: Steatocranus 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 Steatocranus 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: Steatocranus is common in secondary-school and first-year university syllabi. It links to neighbouring topics Cichlid genera, Fishkeeping, Pseudocrenilabrinae, so understanding it makes those chapters shorter.
In everyday life: Look for Steatocranus 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 Steatocranus in 20 minutes

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

Frequently asked questions

What is Steatocranus in simple terms?

Why does Steatocranus 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 Steatocranus?

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 Steatocranus.