biology

Huaridelphis

Huaridelphis 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 Huaridelphis rather than just read about it. In short: Huaridelphis is an extinct genus of river dolphins from the Early Miocene (Deseadan to Friasian in the SALMA classification). The type species is H. raimondii, found in the Chilcatay Formation of the Pisco Basin.

Key takeaways

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

Reference excerpt

Huaridelphis is an extinct genus of river dolphins from the Early Miocene (Deseadan to Friasian in the SALMA classification). The type species is H. raimondii, found in the Chilcatay Formation of the Pisco Basin.

Etymology The genus name is derived from the name of the Huari people, an ancient culture from Peru, and from the Latin word for "dolphin"; delphis. The specific name was chosen in honor of Antonio Raimondi, an Italian geographer and the first person to discover fossilized whale remains in Peru.

Description H. raimondii was a relatively small squalodelphinid, with a bizygomatic breadth of 207 millimetres (8.1 in) and a condylobasal length of 494 millimetres (19.4 in). The rostrum, which was only slightly dorsoventrally flattened, and made up only 67% of the condylobasal length, considerably less than most squalodelphinids. The antorbital notches were V-shaped and asymmetrical, with the right notch further back on the head than the left one. The species had 28-30 teeth per top row, with alveoli ranging in diameter between 3.7 and 5.5 millimetres (0.15 and 0.22 in). Teeth ranged from 3.35 to 6.4 millimetres (0.132 to 0.252 in) high at the crown. Ribs measured around 260 millimetres (10 in).

Discovery Fossils of H. raimondii have been recovered from the Chilcatay Formation in Ullujaya and Zamaca, in the Ica Region of Peru.

Habitat The specimens date from the Early Miocene. Specimens were found along with fossils of Isurus desori and Carcharocles chubutensis (two species of sharks), as well as those of baleen whales, Teleostei, and sea turtles. Injuries, probably from sharks, were observed on at least two of the fossils.

References

Worked examples

Example 1 — a first encounter with Huaridelphis

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

In research: Huaridelphis 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 Huaridelphis 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: Huaridelphis is common in secondary-school and first-year university syllabi. It links to neighbouring topics Colhuehuapian, Deseadan, Fossil taxa described in 2014, so understanding it makes those chapters shorter.
In everyday life: Look for Huaridelphis 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 Huaridelphis in 20 minutes

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

Frequently asked questions

What is Huaridelphis in simple terms?

Why does Huaridelphis 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 Huaridelphis?

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 Huaridelphis.