science

Olbiaspididae

Olbiaspididae 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 Olbiaspididae rather than just read about it. In short: Olbiaspididae is a family of extinct amphiaspidid heterostracan agnathans whose fossils are restricted to Lower Devonian marine strata of Siberia near the Taimyr Peninsula. In life, all amphiaspidids are thought to be benthic animals that lived most of their lives mostly buried in the sediment of a series of hypersaline lagoons.

Key takeaways

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

Reference excerpt

Olbiaspididae is a family of extinct amphiaspidid heterostracan agnathans whose fossils are restricted to Lower Devonian marine strata of Siberia near the Taimyr Peninsula. In life, all amphiaspidids are thought to be benthic animals that lived most of their lives mostly buried in the sediment of a series of hypersaline lagoons. Amphiaspids are easily distinguished from other heterostracans in that all of the plates of the cephalothoracic armor are fused into a single, muff-like unit, so that the forebody of the living animal would have looked, in the case of olbiaspidids, vaguely like a hot water bottle with a pair of small, or degenerated eyes, with each flanked by a preorbital opening, and a simple, slit-like mouth positioned at the anteriormost portion of the cephalothoracic armor. Olbiaspidids differ from the amphiaspidoid amphiaspids of Amphiaspididae in that olbiaspidids have wing-like extensions of the cephalothoracic armor that the genera of Amphiaspididae lack, and differ from amphiaspidoid amphiaspids of Gabreyaspididae in that gabreyaspidids' mouths are ventrally positioned, whereas the mouths of olbiaspidids are positioned anteriorly.

Taxonomy

Olbiaspis This is the type genus of the family, and has two species, O. coalescens, and O. latissima. O. coalescens resembles a hot water bottle with dorso-anteriorly positioned small eyes flanked by preorbital openings, and a prominent dorsal spine, while O. latissima is extremely broad in comparison.

Kureykaspis Kureykaspis salebrosa has a compact cephalothoracic armor that is pear-shaped (when viewed from above), and that is decorated with distinctive ridges and nodules. The armor has lateral wings with serrated edges. The dorsal spine is vestigial or lacking.

Angaraspis Angaraspis urvantzevi differs from other olbiaspidids in having a rhomboid-shaped cephalothoracic armor. Like Olbiaspis, A. urvantzevi has a prominent dorsal spine.

References

Illustrations

Worked examples

Example 1 — a first encounter with Olbiaspididae

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

In research: Olbiaspididae 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 Olbiaspididae 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: Olbiaspididae is common in secondary-school and first-year university syllabi. It links to neighbouring topics Amphiaspidida, Devonian extinctions, Devonian fish of Asia, so understanding it makes those chapters shorter.
In everyday life: Look for Olbiaspididae 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 Olbiaspididae in 20 minutes

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

Frequently asked questions

What is Olbiaspididae in simple terms?

Why does Olbiaspididae 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 Olbiaspididae?

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 Olbiaspididae.