biology

Neogaeornis

Neogaeornis 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 Neogaeornis rather than just read about it. In short: Neogaeornis is a controversial prehistoric genus of diving bird. The single known species, Neogaeornis wetzeli, was described from fossils found in the Campanian to Maastrichtian Quiriquina Formation of Chile.

Key takeaways

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

Reference excerpt

Neogaeornis is a controversial prehistoric genus of diving bird. The single known species, Neogaeornis wetzeli, was described from fossils found in the Campanian to Maastrichtian Quiriquina Formation of Chile. It lived about 70-67 million years ago. It remains known from the single tarsometatarsus described in 1929 by Lambrecht, and today housed in the Paläontologisches Institut und Museum in Kiel, Germany.

Taxonomy It is controversial because of its uncertain placement. While clearly related to modern birds, N. wetzeli might not be a particularly close relative, but rather belong to the Baptornithidae, a member of the flightless and toothed Hesperornithes. If this is so, Neogaeornis is among the very youngest records of this lineage, and the first one from the Southern Hemisphere. However, the Hesperornithiformes are known to have been birds of the open epicontinental and shelf seas which avoided the outer oceans as surrounded South America at that time. And though apparently somewhat migratory, they are only known from temperate to warm subtropical climates, and it seems that towards the end of the Cretaceous their range shifted polewards. Others consider it a close relative of certain modern birds, such as the Gaviiformes (loons/divers). Both theories are problematic, as neither group is known from the Southern Hemisphere. The even more controversial supposed loon ancestor Polarornis from Seymour Island, Antarctica presents a similar dilemma and Neogaeornis and there is little consensus about the age of Polarornis, and so all that can be said is that Polarornis and Neogaeornis were similarly sized birds with similar lifestyles. Most recent phylogenetic studies seem to favour its position as a basal loon. Alongside Polarornis and some yet unnamed Antarctic specimens, it seems to suggest a Gondwanan origin for this group. In 2017 a phylogenetic study Agnolín and colleagues have found Neogaeornis to be stem-anseriforms along with Polarornis, Australornis and Vegavis in the family Vegaviidae. Gerald Mayr suggested that it is uncertain whether Neogaeornis belongs to the family since the specimen shows traits of other bird groups including those of podicipediform and gaviiform, but if it were true, then both Neogaeornis and possibly the closely related Antarcticavis might represent vegaviids.

References

Bibliography Brands, Sheila (7 Apr 2012). "Scientific name: Neogaeornis*". Project: The Taxonomicon. Retrieved 12 Jun 2012. Chiappe, Luis M (1991). "Cretaceous birds of Latin America". Cretaceous Research. 12 (1): 55–63. Bibcode:1991CrRes..12...55C. doi:10.1016/0195-6671(91)90027-A. Encyclopædia Britannica (2012). "grebe". Encyclopædia Britannica Online. Encyclopædia Britannica Inc. Retrieved 13 Jun 2012. Mayr, Gerald (2004). "A partial skeleton of a new fossil loon (Aves, Gaviiformes) from the early Oligocene of Germany with preserved stomach content" (PDF). Journal of Ornithology. 145 (4): 281–286. doi:10.1007/s10336-004-0050-9. S2CID 1070943. Archived from the original (PDF) on 2015-09-24. Retrieved 2008-07-28.

Worked examples

Example 1 — a first encounter with Neogaeornis

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

In research: Neogaeornis 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 Neogaeornis 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: Neogaeornis is common in secondary-school and first-year university syllabi. It links to neighbouring topics Anseriformes, Bird genera, Birds of South America, so understanding it makes those chapters shorter.
In everyday life: Look for Neogaeornis 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 “Neogaeornis” →

Affiliate

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

How to study Neogaeornis in 20 minutes

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

Frequently asked questions

What is Neogaeornis in simple terms?

Why does Neogaeornis 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 Neogaeornis?

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 Neogaeornis.