science

Trachiniformes

Trachiniformes 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 Trachiniformes rather than just read about it. In short: Trachiniformes is an order of percomorph bony fish, whose contents are traditionally placed in suborder Trachinoidei of Perciformes. However, Trachiniformes is recovered as polyphyletic in recent large scale molecular phylogenetic studies.

Key takeaways

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

Reference excerpt

Trachiniformes is an order of percomorph bony fish, whose contents are traditionally placed in suborder Trachinoidei of Perciformes. However, Trachiniformes is recovered as polyphyletic in recent large scale molecular phylogenetic studies. Trachinidae itself is recovered as part of Percoidei, while other families respectively belong to Scombriformes, Gobiiformes, new orders Uranoscopiformes and Pempheriformes, and other clades in Perciformes.

Timeline of genera

Families The following families make up the Trachiniformes: (with respectively belonging taxa following the molecular phylogenies)

Ammodytidae Bonaparte, 1832 - sandeels or sandlances (considered as part of Uranoscopiformes). †Callipterygidae Jordan, 1905 (fossil; Eocene of Italy) Chiasmodontidae Jordan & Gilbert, 1883 - the swallowers (considered as part of Scombriformes). Champsodontidae Jordan & Snyder, 1902 - gulpers, gapers or crocodile toothfishes (considered as part of Pempheriformes). Cheimarrichthyidae Regan, 1913 - New Zealand torrentfishes (considered as part of Uranoscopiformes). Creediidae Waite, 1899 - sandburrowers (considered as part of Pempheriformes). Leptoscopidae Gill, 1859 - southern sandfishes (considered as part of Pempheriformes). Percophidae Swainson, 1839 - duckbills (as a polyphyly, respectively part of Pempheriformes and Perciformes (Notothenioidei and Bembropoidei)). Pinguipedidae Günther, 1860 - sandperches (considered as part of Uranoscopiformes). Trachinidae Rafinesque, 181 - weeverfishes (considered as part of Percoidei, belong to Perciformes). Trichodontidae Bleeker, 1859 - sandfish (considered as a part of Cottoidei, belong to Scorpaeniformes). Trichonotidae Günther, 1861 - sanddivers (considered to form the monotypic Trichonotoidei, belong to Gobiiformes). Uranoscopidae Bonaparte, 1831 - stargazers (considered as part of Uranoscopiformes).

References

Sepkoski, Jack (2002). "A compendium of fossil marine animal genera". Bulletins of American Paleontology. 363: 1–560. Retrieved 2011-05-19.

Illustrations

Worked examples

Example 1 — a first encounter with Trachiniformes

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

In research: Trachiniformes 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 Trachiniformes 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: Trachiniformes is common in secondary-school and first-year university syllabi. It links to neighbouring topics Actinopterygii stubs, Percomorpha, Polyphyletic groups, so understanding it makes those chapters shorter.
In everyday life: Look for Trachiniformes 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.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “Trachiniformes” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Trachiniformes in 20 minutes

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

Frequently asked questions

What is Trachiniformes in simple terms?

Why does Trachiniformes 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 Trachiniformes?

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 Trachiniformes.