science

Placobdelloides siamensis

Placobdelloides siamensis 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 Placobdelloides siamensis rather than just read about it. In short: Placobdelloides siamensis is a species of blood-feeding jawless leech in the family Glossiphoniidae. It is commonly known as the Siam shield leech and is a prevalent ectoparasite on Malayemys turtles but has a range of Geoemydidae hosts.

Key takeaways

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

Reference excerpt

Placobdelloides siamensis is a species of blood-feeding jawless leech in the family Glossiphoniidae. It is commonly known as the Siam shield leech and is a prevalent ectoparasite on Malayemys turtles but has a range of Geoemydidae hosts. In high numbers it can cause severe anaemia and malnutrition which can lead to the death of its host.

Taxonomy The species was first described as Hemiclepsis siamensis by Oka in 1917 then transferred by Sawyer to his new genus Placobdelloides in 1986. In 2018, it was redescribed from specimens collected in Thailand.

Hosts

The type host is the Black Marsh Turtle, Siebenrockiella crassicollis. Other hosts include the Southeast Asian Box Turtle, Cuora amboinensis, the Yellow-headed Temple Turtle, Heosemys annandalii, the Mekong Snail-eating Turtle Malayemys subtrijuga, the Malayan Snail-eating Turtle Malayemys macrocephala, the Khorat Snail-eating Turtle Malayemys khoratensis, Oldham's lead turtle Cyclemys oldhamii and the giant Asian pond turtle Heosemys grandis.

References

Illustrations

Worked examples

Example 1 — a first encounter with Placobdelloides siamensis

Start with the simplest possible case. Write down what Placobdelloides siamensis 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 Placobdelloides siamensis 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 Placobdelloides siamensis 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 Placobdelloides siamensis

In research: Placobdelloides siamensis 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 Placobdelloides siamensis 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: Placobdelloides siamensis is common in secondary-school and first-year university syllabi. It links to neighbouring topics Animals described in 1917, Annelid stubs, Glossiphoniidae, so understanding it makes those chapters shorter.
In everyday life: Look for Placobdelloides siamensis 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 Placobdelloides siamensis in 20 minutes

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

Frequently asked questions

What is Placobdelloides siamensis in simple terms?

Why does Placobdelloides siamensis 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 Placobdelloides siamensis?

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 Placobdelloides siamensis.