biology

Paraprefica

Paraprefica 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 Paraprefica rather than just read about it. In short: Paraprefica is an extinct genus of potoo (family Nyctibiidae) from the middle Eocene (c. 48 million years ago). Its fossil remains have been found in the Messel pit at Messel, Germany.

Key takeaways

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

Reference excerpt

Paraprefica is an extinct genus of potoo (family Nyctibiidae) from the middle Eocene (c. 48 million years ago). Its fossil remains have been found in the Messel pit at Messel, Germany.

Taxonomy It is the only known member of the extinct subfamily Parapreficinae, erected in 2021 to distinguish Paraprefica from the extant potoos of the genus Nyctibius and Phyllaemulor, which have a slightly different anatomy and are known only from the Americas. Described for the first time in 1999 by G. Mayr, this bird was at first placed in the genus Prefica, a North American fossil closely related to modern oilbirds (Steatornis caripensis). Later research showed however that Paraprefica had characteristics found only in the family Nyctibiidae, order Caprimulgiformes (the nightjars). It is possible that the similarities between the bones of Prefica and Paraprefica are due to primitive characters found in all Cypselomorphs, the group that also includes the Caprimulgiformes. There are two species in the genus: Paraprefica kelleri, the best known, and Paraprefica major.

Description This bird is known from fossil remains which include a skeleton and many well-preserved skulls, and is one of the best preserved Eocene birds. Paraprefica, a medium-sized bird, has skull and legs somewhat resembling today's potoos, in the genera Nyctibius and Phyllaemulor. The head has a thin beak and a very wide mouth, while the wings are relatively large, though smaller than those of extant potoos.

Distribution

The existing finds from Germany present a puzzle on the birds' distribution, as modern potoos are found only in the New World, from Mexico to the north of Argentina and the Caribbean islands of Jamaica, Hispaniola and Tobago, making them Neotropical. Either the group was once cosmopolitan, and has become limited to the Americas, or it was Eurasian and has at some time shifted its distribution.

References

Sources Mayr, G. (1999). Caprimulgiform birds from the Middle Eocene of Messel (Hessen, Germany). Journal of Vertebrate Paleontology 19(3): 521–532. Mayr, G. (2005). The Palaeogene Old World Potoo Paraprefica Mayr, 1999 (Aves, Nyctibiidae): its osteology and affinities to the New World Preficinae. Journal of Systematic Palaeontology. 3 (4): 359–370. doi:10.1017/S1477201905001653 Tudge, C. (2011). The Link: Uncovering Our Earliest Ancestor. Hachette.

Illustrations

Worked examples

Example 1 — a first encounter with Paraprefica

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

In research: Paraprefica 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 Paraprefica 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: Paraprefica is common in secondary-school and first-year university syllabi. It links to neighbouring topics Eocene birds of Europe, Fossil taxa described in 2005, Nyctibiiformes, so understanding it makes those chapters shorter.
In everyday life: Look for Paraprefica 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 Paraprefica in 20 minutes

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

Frequently asked questions

What is Paraprefica in simple terms?

Paraprefica is an extinct genus of potoo (family Nyctibiidae) from the middle Eocene (c. 48 million years ago). Its fossil remains have been found in the Messel pit at Messel, Germany.

Why does Paraprefica 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 Paraprefica?

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 Paraprefica.