biology

Pseudocorynopoma doriae

Pseudocorynopoma doriae 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 Pseudocorynopoma doriae rather than just read about it. In short: Pseudocorynopoma doriae, or the dragonfin tetra, is a species of freshwater ray-finned fish, a characin, belonging to the family Stevardiidae. It is found in inland waters in South America.

Key takeaways

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

Reference excerpt

Pseudocorynopoma doriae, or the dragonfin tetra, is a species of freshwater ray-finned fish, a characin, belonging to the family Stevardiidae. It is found in inland waters in South America.

Taxonomy Pseudocorynopoma doriae was first formally described in 1891 by the Italian ichthyologist Alberto Perugia, with its type locality given as the Río de la Plata. When he described this species, Pergia classified it in the genus Pseudocorynopoma, this taxon being the type species of that genus by monotypy. Subsequently, two more species have been classified in this genus, which is classified within the subfamily Stevardiinae of the family Stevardiidae. This family is in the suborder Characoidei of the order Characiformes.

Description Pseudocorynopoma doriae has an elongated, flattened body. The mouth is large, pointing upwards diagonally, with fine teeth. The eyes are large. The fins are large, with the exception of the pelvic fin. Both anal and dorsal fins when folded reach the root of the caudal plumage. The caudal fin is bilobate, with equal lobes. The basic coloration is brown with silvery reflections. Along the body runs a horizontal band, which, depending on the origin of the fish, may be cream, white or bluish-silver. There is also another black line running from the base of the dorsal fin to the caudal fin. The gills and ventral area are white. The fins are yellow-orange in color, but at the same time almost transparent. Males have large pectoral, dorsal and anal fins, while females' fins are of normal size. Their maximum size is 8 cm (3.1 in), in captive fish; otherwise, the maximum standard length is 6.3 cm (2.5 in).

Distribution and habitat Pseudocorynopoma doriae is found in the drainage systems of the Uruguay and Parana rivers in Argentina and Uruguay. This species prefers to be at depth of less than 1 m (3 ft 3 in) where there is a slow current in estuaries, marshes, inundated areas, lagoons, streams, canals and other small watercourses. They stay close to the shoreline, in and around vegetation, and avoid the main channels of rivers.

Diet The dragonfin tetra is an omnivorous fish, feeding mainly on small invertebrates such as water fleas, ringworms, small shrimp, insect larvae, and flying insects. Zooplankton is also part of their diet. The fish also eat algae, soft plant leaves, and the eggs of other fish.

References

Sources https://housaqua.com/en/2563-pseudocorynopoma-doriae.html https://www.fishbase.se/summary/12398

Illustrations

Worked examples

Example 1 — a first encounter with Pseudocorynopoma doriae

Start with the simplest possible case. Write down what Pseudocorynopoma doriae 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 Pseudocorynopoma doriae 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 Pseudocorynopoma doriae 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 Pseudocorynopoma doriae

In research: Pseudocorynopoma doriae 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 Pseudocorynopoma doriae 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: Pseudocorynopoma doriae is common in secondary-school and first-year university syllabi. It links to neighbouring topics Fish described in 1891, Freshwater fish, Freshwater fish of South America, so understanding it makes those chapters shorter.
In everyday life: Look for Pseudocorynopoma doriae 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 Pseudocorynopoma doriae in 20 minutes

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

Frequently asked questions

What is Pseudocorynopoma doriae in simple terms?

Pseudocorynopoma doriae, or the dragonfin tetra, is a species of freshwater ray-finned fish, a characin, belonging to the family Stevardiidae. It is found in inland waters in South America.

Why does Pseudocorynopoma doriae 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 Pseudocorynopoma doriae?

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 Pseudocorynopoma doriae.