science

Pseudaxine kurra

Pseudaxine kurra is a science 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 Pseudaxine kurra rather than just read about it. In short: Pseudaxine kurra is a species of monogenean, parasitic on the gills of a marine fish. It belongs to the family Gastrocotylidae.

Key takeaways

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

Reference excerpt

Pseudaxine kurra is a species of monogenean, parasitic on the gills of a marine fish. It belongs to the family Gastrocotylidae.

Systematics Pseudaxine kurra was described based on several specimens from the gills of the yellowtail scad Caranx kurra ( currently named Atule mate) (Carangidae), collected off India.

Description Pseudaxine kurra has the general morphology of all species of Pseudaxine, with an elongate body tapering towards both ends, comprising an anterior part which contains most organs and a posterior part called the haptor. The haptor triangular, asymmetrical, without extensions from body organs, disposed slightly oblique to the long axis of the body and bears 15-28 clamps, arranged in a single row. The clamps of the haptor attach the animal to the gill of the fish. The extreme of the haptor carries an elongated proboscis-like process called "the terminal lapet", bearing two pair of symmetrical hooks. There are also two spherical or oval buccal suckers at the anterior extremity. The digestive organs include an anterior, terminal funnel shaped and muscular mouth, a large and oval pharynx, a broad oesophagus and a posterior intestine that bifurcates in two lateral branches with numerous short outer and few short intercrural branches, posteriorly terminating independently behind the last testis, the right branche slightly over-reach the left. Each adult contains male and female reproductive organs. The reproductive organs include an anterior genital atrium, a muscular and conical penis, with a basal bulb and a distal corona of 10-12 recurved hooks, a single unarmed dorsal vagina, an inverted U-shaped ovary, and 9-14 irregularly oval or somewhat rectangular testes post-ovarian, and extend to the base of the haptor in the intercrural space. Eggs spindle shaped, with filaments at both ends.

Etymology The specific epithet kurra is derived from the generic name of the type-host Caranx kurra.

Hosts and localities

The type-host is the yellowtail scad Atule mate (Carangidae). The type-locality is off India. Several specimens of Gastrocotyle kurra were observed on the gill filaments of the host along with Pseudaxine kurra. It was also recorded on the type-host off China.

References

Worked examples

Example 1 — a first encounter with Pseudaxine kurra

Start with the simplest possible case. Write down what Pseudaxine kurra claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, 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 Pseudaxine kurra 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 Pseudaxine kurra 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 Pseudaxine kurra

In research: Pseudaxine kurra appears in science 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 Pseudaxine kurra 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: Pseudaxine kurra is common in secondary-school and first-year university syllabi. It links to neighbouring topics Animals described in 1968, Fauna of India, Microcotylidae, so understanding it makes those chapters shorter.
In everyday life: Look for Pseudaxine kurra 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 Pseudaxine kurra in 20 minutes

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

Frequently asked questions

What is Pseudaxine kurra in simple terms?

Pseudaxine kurra is a species of monogenean, parasitic on the gills of a marine fish. It belongs to the family Gastrocotylidae.

Why does Pseudaxine kurra matter?

Because it connects several science 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 Pseudaxine kurra?

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 Pseudaxine kurra.