science

Proraphidia

Proraphidia 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 Proraphidia rather than just read about it. In short: Proraphidia is a genus of snakefly in the extinct family Mesoraphidiidae. The genus currently contains three species; Proraphidia gomezi from the La Pedrera de Rúbies Formation in Spain, Proraphidia hopkinsi from the Weald Clay in England, and the type species Proraphidia turkestanica from Kazakhstan.

Key takeaways

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

Reference excerpt

Proraphidia is a genus of snakefly in the extinct family Mesoraphidiidae. The genus currently contains three species; Proraphidia gomezi from the La Pedrera de Rúbies Formation in Spain, Proraphidia hopkinsi from the Weald Clay in England, and the type species Proraphidia turkestanica from Kazakhstan. The genus was first described by O. M. Martynova in 1941 with the publication of P. turkestanica from Jurassic deposits of the Karabastau Formation in Karatau, Kazakhstan. All species in the genus are noted for the small size of the pterostigma when compared to other raphidiopteran species. P. hopkinsi and P. gomezi were described by James E. Jepson and Edmund A. Jarzembowski in a 2008 paper published in the journal Alavesia. P. hopkinsi is known from a fossil found in deposits of the Lower Weald Clay at the Clockhouse Brickworks in Surrey, England. The deposits date to the Late Hauterivian stage of the Lower Cretaceous. The P. hopkinsi holotype is described from a single forewing that is 11.5 millimetres (0.45 in) long preserved in a section of siltstone concretion also containing Blattodea, Hemiptera, Mecoptera, and Diptera specimens. The wing is narrower than P. turkestanica, with three crossveins between the R and Sc veins, and the second branch of the CuA forked. The type specimen is housed in the Booth Museum of Natural History at Brighton, England, as specimen number "BMB 014915, - 8". P. hopkinsi was named in honor of Dick Hopkins, a long-time volunteer of the Booth Museum. The holotype of Proraphidia gomezi is a partial body with overlapping fore and hind wings preserved in Early Barremian-age limestone from deposits at Pedrera de Meià in Rúbies, Spain. The forewings are 13 millimetres (0.51 in) long while the hindwings are notably shorter than P. turkestanica and have fewer veinlets in the coastal region. Named for Mr Gómez-Pallerola, a fossil collector and contributor to the Institut d'Estudis Ilerdencs in Lleida, Catalonia (Spain) where the holotype of P. gomezi, specimen number "L. 29" is housed. A fourth species, from the Upper Jurassic/Lower Cretaceous sediments at Baisa, Buryatia, Russia, was previously placed in Proraphidia by Dr. Martynova in 1961 as Proraphidia vitimica. However the species was subsequently moved to Alloraphidia in 1993 by Dr. Alexandr G. Ponomarenko. The species was then placed in its current genus Pararaphidia as Pararaphidia vitimica by Dr. Michael Engel in 2002.

References

Worked examples

Example 1 — a first encounter with Proraphidia

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

In research: Proraphidia 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 Proraphidia 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: Proraphidia is common in secondary-school and first-year university syllabi. It links to neighbouring topics Cretaceous insects, Fossil taxa described in 1941, Late Jurassic insects, so understanding it makes those chapters shorter.
In everyday life: Look for Proraphidia 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 Proraphidia in 20 minutes

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

Frequently asked questions

What is Proraphidia in simple terms?

Why does Proraphidia 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 Proraphidia?

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 Proraphidia.