biology

Henricosbornia

Henricosbornia 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 Henricosbornia rather than just read about it. In short: Henricosbornia is an extinct genus of henricosborniid notoungulate that lived from the Late Paleocene to the Middle Eocene of what is now Argentina and Brazil. Description This animal is mostly known from its fossilized teeth, and any reconstruction of it is therefore only hypothetical.

Key takeaways

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

Reference excerpt

Henricosbornia is an extinct genus of henricosborniid notoungulate that lived from the Late Paleocene to the Middle Eocene of what is now Argentina and Brazil.

Description This animal is mostly known from its fossilized teeth, and any reconstruction of it is therefore only hypothetical. The dentition of Henricosbornia was primitive in that it had no diastema, and the molars and premolars were low-crowned (brachydont). All the upper molars were triangular in section, and devoid of hypoconus. The crest of the trigonid was oblique, and the metaconid was higher than the protoconid. The entoconid was posterior, and took the form of a transversal crest. The species Henricosbornia lophodonta exhibits a large intraspecific variability in the metaloph morphology.

Classification The genus Henricosbornia was first described in 1901 by Florentino Ameghino, based on fossil remains found in terrains dating from the Early Eocene of Argentina, in the Chubut Province. In a few years, Ameghino described numerous remains of teeth from the same area and considered them as belonging to various species of notoungulates, which he named Hericosbornia lophodonta (the type species), Hemistylops paucicuspidatus, Hemistylops trigonostyloides, Pantostylops completus, Microstylops monoconus, Prohyracotherium patagonicum, Microstylops clarus, Selenoconus spiculatus, Prohyracotherium matutinum. The generic name is derived from the famous paleontologist Henry Fairfield Osborn. All these species were later identified as Henricosbornia lophodonta by George Gaylord Simpson, who identified the numerous dental remains as intraspecific variations. Several other species were attributed to the genus, some of them still considered valid; Henricosbornia ampla, the youngest species, was found in deposits dating to the Middle Eocene as well as H. minuta. One of the species described by Ameghino in 1901, Pantostylops typus, may have been a distinct species of Henricosbornia. Fossils attributed to the genus were also discovered in slightly more ancient, Late Paleocene terrains of Argentina. Given its archaic characteristics, Henricosbornia is considered to be one of the most basal notoungulates. It is the eponymous genus of Henricosborniidae, a family including the most basal notoungulates, and classically associated with the Notostylopidae within the probably paraphyletic suborder Notioprogonia. It is related to Nanolophodon.

References

F. Ameghino. 1901. Notices préliminaires sur des ongulés nouveaux des terrains crétacés de Patagonie [Preliminary notes on new ungulates from the Cretaceous terrains of Patagonia]. Boletin de la Academia Nacional de Ciencias de Córdoba 16:349-429 F. Ameghino. 1904. Nuevas especies de mamíferos, cretáceos y terciarios de la República Argentina [New species of mammals, Cretaceous and Tertiarty, from the Argentine Republic]. Anales de la Sociedad Cientifica Argentina 56–58:1-142 G. G. Simpson. 1935. Descriptions of the oldest known South American mammals, from the Rio Chico Formation. American Museum Novitates 793:1-25

Illustrations

Worked examples

Example 1 — a first encounter with Henricosbornia

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

In research: Henricosbornia 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 Henricosbornia 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: Henricosbornia is common in secondary-school and first-year university syllabi. It links to neighbouring topics Casamayoran, Eocene mammals of South America, Fossil taxa described in 1901, so understanding it makes those chapters shorter.
In everyday life: Look for Henricosbornia 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 Henricosbornia in 20 minutes

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

Frequently asked questions

What is Henricosbornia in simple terms?

Henricosbornia is an extinct genus of henricosborniid notoungulate that lived from the Late Paleocene to the Middle Eocene of what is now Argentina and Brazil. Description This animal is mostly known from its fossilized teeth, and any reconstruction of it is therefore only hypothetical.

Why does Henricosbornia 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 Henricosbornia?

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 Henricosbornia.