science

Thorlaksonius platypus

Thorlaksonius platypus 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 Thorlaksonius platypus rather than just read about it. In short: Thorlaksonius platypus is a species of Pleustid amphipod native to southern California. It is thought to be an example of mimicry, as it resembles the gastropod Alia carinata.

Key takeaways

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

Reference excerpt

Thorlaksonius platypus is a species of Pleustid amphipod native to southern California. It is thought to be an example of mimicry, as it resembles the gastropod Alia carinata. This was the first example of an arthropod mimicking a gastropod ever described.

Taxonomy Thorlaksonius platypus was originally described in 1960 as Pleustes platypa. However, in 1994, it was redescribed under the new genus Thorlaksonius.

Description Thorlaksonius platypus ranges in size from 3.5–10 mm (0.14–0.39 in). It has a variable color which closely resembles the variation of Alia carinata. The color of only a single specimen has been described. This individual displayed a brown and grey body with a singular yellow band across its dorsal plates, called the pereon. Its walking legs were light in color with some mottling, again resembling A. carinata. The way in which the amphipod holds its body also mimics the distinct shell of A. carinata. Its abdomen (pleon) is tucked underneath its body and is partially hidden by long protrusions of the pereon. The end of its body sticks up in the water at an angle. It walks slowly when in this position, but is capable of swimming. This species is quite similar to Thorlaksonius depressus and Thorlaksonius grandirostris. It may be distinguished by the shape of its dorsal pereon and pleon segments, which are sharp in T. platypus, and round in T. depressus. Only the final (7th) segment of the pereon and pleon segments 1 and 2 have these tooth-like projections. The only other distinguishing characteristic is a broad rostrum that is longer than the head.

Distribution and habitat Thorlaksonius platypus occurrences have been recorded from San Diego in the south to Gaviota State Park in the north. Its range may extend up to Point Conception, which separates it from Thorlaksonius depressus (except at La Jolla Cove, where the two species are sympatric and likely interbreed). It is also found off the islands of Catalina and Santa Barbara. This species is typically found living on algae, including Macrocystis and coralline algae, but may also be found on other substrates.

References

Worked examples

Example 1 — a first encounter with Thorlaksonius platypus

Start with the simplest possible case. Write down what Thorlaksonius platypus 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 Thorlaksonius platypus 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 Thorlaksonius platypus 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 Thorlaksonius platypus

In research: Thorlaksonius platypus 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 Thorlaksonius platypus 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: Thorlaksonius platypus is common in secondary-school and first-year university syllabi. It links to neighbouring topics Amphilochidea, Crustaceans described in 1960, Endemic crustaceans of the United States, so understanding it makes those chapters shorter.
In everyday life: Look for Thorlaksonius platypus 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 Thorlaksonius platypus in 20 minutes

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

Frequently asked questions

What is Thorlaksonius platypus in simple terms?

Thorlaksonius platypus is a species of Pleustid amphipod native to southern California. It is thought to be an example of mimicry, as it resembles the gastropod Alia carinata.

Why does Thorlaksonius platypus 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 Thorlaksonius platypus?

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 Thorlaksonius platypus.