biology

Hondonadia

Hondonadia 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 Hondonadia rather than just read about it. In short: Hondonadia is an extinct genus of Late Eocene to Early Oligocene (Tinguirirican) marsupials related to today's shrew opossums and with similar features as the related Rosendolops. The type species Hondonadia feruglioi was described by Goin and Candela in 1998.

Key takeaways

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

Reference excerpt

Hondonadia is an extinct genus of Late Eocene to Early Oligocene (Tinguirirican) marsupials related to today's shrew opossums and with similar features as the related Rosendolops. The type species Hondonadia feruglioi was described by Goin and Candela in 1998. In later years, five more species were recognized, of which Pascualdelphys fierroensis, described by Flynn and Wyss in 1999, that was in 2010 synonymized with Hondonadia.

Description It was a small animal, with estimates of the body weight of the mammal ranging from 27 to 93.3 grams (0.95 to 3.29 oz). The species H. feruglioi and H. praecipitia were possibly larger. Its main diet probably consisted of seeds rather than insects. The type species Hondonadia feruglioi preserves at least four upper incisors (of which the posteriormost is the smallest), but the presence of five teeth cannot be ruled out. H. feruglioi also preserves a very large, subvertical C1.

Fossil distribution Fossils of the genus were found in the Tinguiririca fauna of the Abanico Formation of Chile, the Santa Rosa local fauna of the Yahuarango Formation in Amazonian Peru and in the Gran Barranca fauna of the Vera Member pertaining to the Sarmiento Formation in Argentina.

References

Bibliography Beck, Robin M (2016), "The Skull of Epidolops ameghinoi from the Early Eocene Itaboraí Fauna, Southeastern Brazil, and the Affinities of the Extinct Marsupialiform Order Polydolopimorphia", Journal of Mammalian Evolution, 24: 1–43, retrieved 2020-07-30 Zimicz, Natalia (2014), "New Paleogene Marsupials from the Amazon Basin of Eastern Peru", Ameghiniana, 51: 106–128, doi:10.5710/AMEGH.20.12.2013.1493, retrieved 2020-07-30 Goin, Francisco Javier; Abello, María Alejandra; Chornogubsky, Laura (2010), Middle Tertiary marsupials from central Patagonia (early Oligocene of Gran Barranca): understanding South America's Grande Coupure in The Paleontology of Gran Barranca. Evolution and Environmental Change Through the Middle Cenozoic of Patagonia, Cambridge University Press, pp. 69–105, ISBN 978-0-521-87241-6 Goin, F. J.; Candela, A. M. (2004), "New Paleogene Marsupials from the Amazon Basin of Eastern Peru", Natural History Museum of Los Angeles County, Science Series, 40: 15–60 Flynn, J. J.; Wyss, A. W. (1999), "New Marsupials from the Eocene-Oligocene transition of the Andean main range, Chile", Journal of Vertebrate Paleontology, 19 (3): 533–549, Bibcode:1999JVPal..19..533F, doi:10.1080/02724634.1999.10011163

Worked examples

Example 1 — a first encounter with Hondonadia

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

In research: Hondonadia 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 Hondonadia 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: Hondonadia is common in secondary-school and first-year university syllabi. It links to neighbouring topics Eocene mammals of South America, Eocene marsupials, Fossil taxa described in 1998, so understanding it makes those chapters shorter.
In everyday life: Look for Hondonadia 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 Hondonadia in 20 minutes

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

Frequently asked questions

What is Hondonadia in simple terms?

Why does Hondonadia 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 Hondonadia?

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 Hondonadia.