biology

Tacuadactylus

Tacuadactylus is a biology 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 Tacuadactylus rather than just read about it. In short: Tacuadactylus is a genus of ctenochasmatid pterosaur from the Late Jurassic of Uruguay. Discovery and naming A snout found near Batoví was in 2016 reported as a saw fish, the oldest known member of the Pristidae.

Key takeaways

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

Reference excerpt

Tacuadactylus is a genus of ctenochasmatid pterosaur from the Late Jurassic of Uruguay.

Discovery and naming A snout found near Batoví was in 2016 reported as a saw fish, the oldest known member of the Pristidae. Subsequently, a CAT-scan showed that the presumed perpendicular teeth of the fossil were in fact sediment fillings of the tooth sockets, which themselves pointed obliquely to the front as with pterosaurs. In 2018, the specimen was described as the first pterosaur found in Uruguay but not yet named. In 2021, the type species Tacuadactylus luciae was named and described by Matías Soto, Felipe Montenegro, Pablo Toriño, Valeria Mesa and Daniel Perea. The generic name combines a reference to the location of the discovery with a Greek daktylos, "finger", a usual suffix in the names of pterosaurs. The specific name honours Soto's daughter, Lucia. The holotype, FC-DPV-2869, was recovered from rocks in the Batoví Member of the lower Tacuarembó Formation. It consists of fragments of the rostrum and dentary. Other remains are six loose teeth, specimen FC-DPV 3090, found at Bidegain in the same formation.

Classification Tacuadactylus is a member of the Gnathosaurinae, and closely related to Gnathosaurus. It was in 2021 the oldest known ctenochasmatid from South America. Below is a cladogram from a 2025 study by Sita Maritkoon and colleagues, reaffirming its close relation to Gnathosaurus:

References

Worked examples

Example 1 — a first encounter with Tacuadactylus

Start with the simplest possible case. Write down what Tacuadactylus claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, 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 Tacuadactylus 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 Tacuadactylus 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 Tacuadactylus

In research: Tacuadactylus appears in biology 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 Tacuadactylus 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: Tacuadactylus is common in secondary-school and first-year university syllabi. It links to neighbouring topics Ctenochasmatidae, Fossil taxa described in 2021, Fossils of Uruguay, so understanding it makes those chapters shorter.
In everyday life: Look for Tacuadactylus 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 Tacuadactylus in 20 minutes

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

Frequently asked questions

What is Tacuadactylus in simple terms?

Tacuadactylus is a genus of ctenochasmatid pterosaur from the Late Jurassic of Uruguay. Discovery and naming A snout found near Batoví was in 2016 reported as a saw fish, the oldest known member of the Pristidae.

Why does Tacuadactylus matter?

Because it connects several biology 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 Tacuadactylus?

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 Tacuadactylus.