biology

Piscobalaena

Piscobalaena 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 Piscobalaena rather than just read about it. In short: Piscobalaena is an extinct genus of cetaceans, which lived from the Middle to Late Miocene epochs (about 11.6 to 5.3 million years ago) in Peru and Florida. Its fossils have been found in the Pisco Formation of Peru and the Bone Valley Formation of Florida.

Key takeaways

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

Reference excerpt

Piscobalaena is an extinct genus of cetaceans, which lived from the Middle to Late Miocene epochs (about 11.6 to 5.3 million years ago) in Peru and Florida. Its fossils have been found in the Pisco Formation of Peru and the Bone Valley Formation of Florida. At least some individuals of this diminutive whale were preyed on by the shark O. megalodon.

Description This animal looked much like whales today, particularly small whales. The length was probably less than 5 metres (16 ft), and the skull of an adult was about one meter. Piscobalaena is known for some well-preserved specimens, including three young individuals and an adult. Some characteristics of the skull distinguish Piscobalaena from modern whales (such as the shape of the supraorbital process).

Classification Described for the first time in 1989 by Pilleri and Siber, Piscobalaena is known from fossils found in the Pisco Formation in Peru. Piscobalaena is considered a representative of Cetotheriidae a group of baleen whales with primitive characteristics similar to that of Balaenoptera, fossil species of which have been found mainly in the northern hemisphere. The closest relative of Piscobalaena appears to have been Herpetocetus, from the Mio-Pliocene of the northern hemisphere.

Palaeogeography Other fragmentary remains attributed to Piscobalaena are also from Peru, but date a little older (late Miocene, about 10 million years ago). So it seems that this kind of whales were located in the Pacific coast of South America and evolved for at least five million years. Other fossils attributed with some doubt to Piscobalaena come from the Miocene Bone Valley Formation of Florida: If so, then Piscobalaena might have had a wider distribution than the Peruvian coast. This could have been because the Isthmus of Panama was open until at least Late Pliocene, allowing the passage of marine species from the Atlantic to the Pacific and vice versa. Other marine mammals found in the Pisco Formation include the odd dolphin Odobenocetops, the long-necked seal Acrophoca, and aquatic sloth Thalassocnus.

References

Illustrations

Worked examples

Example 1 — a first encounter with Piscobalaena

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

In research: Piscobalaena 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 Piscobalaena 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: Piscobalaena is common in secondary-school and first-year university syllabi. It links to neighbouring topics Cetotheriidae, Chasicoan, Clarendonian, so understanding it makes those chapters shorter.
In everyday life: Look for Piscobalaena 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 Piscobalaena in 20 minutes

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

Frequently asked questions

What is Piscobalaena in simple terms?

Why does Piscobalaena 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 Piscobalaena?

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 Piscobalaena.