biology

Lanthanolania

Lanthanolania 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 Lanthanolania rather than just read about it. In short: Lanthanolania (meaning "forgotten butcher") is an extinct genus of early reptile from Middle Permian (Wordian stage, or uppermost Kazanian in Eastern Europe) deposits of Arkhangelsk Oblast, Russia. The genus contains a single species, Lanthanolania ivakhnenkoi, known from the holotype and only specimen PIN 162/56, a nearly complete skull from the Glyadnaya Shchelya locality in Mesen District.

Key takeaways

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

Reference excerpt

Lanthanolania (meaning "forgotten butcher") is an extinct genus of early reptile from Middle Permian (Wordian stage, or uppermost Kazanian in Eastern Europe) deposits of Arkhangelsk Oblast, Russia. The genus contains a single species, Lanthanolania ivakhnenkoi, known from the holotype and only specimen PIN 162/56, a nearly complete skull from the Glyadnaya Shchelya locality in Mesen District. It was named in 2003 by Sean P. Modesto and Robert R. Reisz.

Phylogeny In their 2003 description of Lanthanolania, Modesto and Reisz described this taxon as a diapsid reptile based on the triradiate (three-pronged) morphology of the postorbital and jugal. In some versions of their phylogenetic analyses, it was placed as a member of the Lepidosauromorpha within the reptile crown group, although the authors noted that additional research is needed on early reptiles to better understand their relationships. While they observed the ventral surface of the parasphenoid is flat, similar to millerettids, they concluded that the diapsid skull anatomy is inconsistent with a placement of Lanthanolania within this clade. In their 2011 description of Orovenator, Reisz, Modesto and Scott recovered Lanthanolania as a member of the Neodiapsida, diverging after Orovenator. These results are displayed in the cladogram below:

In 2025, Jenkins et al. published the results of an expansive phylogenetic dataset incorporating synchrotron data, in which they identified Lanthanolania as the earliest-diverging member of the Millerettidae within the novel neoreptilian clade Parapleurota, outside of Neodiapsida. These results are displayed in Cladogram A below: Later that year, Buffa, Jenkins, and Benoit published a redescription of the Permian reptile Galesphyrus using a different matrix for their phylogenetic analysis. While Lanthanolania had to be trimmed from the analysis to achieve better resolution for the placement of Galesphyrus, earlier iterations of the analysis placed it in a position roughly equivalent to the base of Parapleurota (called 'Clade P' by these authors). The likely position of Lanthanolania is shown in Cladogram B below, inferred from the first analysis iteration.

References

Worked examples

Example 1 — a first encounter with Lanthanolania

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

In research: Lanthanolania 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 Lanthanolania 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: Lanthanolania is common in secondary-school and first-year university syllabi. It links to neighbouring topics Diapsids, Fossil taxa described in 2003, Guadalupian reptiles of Europe, so understanding it makes those chapters shorter.
In everyday life: Look for Lanthanolania 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 Lanthanolania in 20 minutes

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

Frequently asked questions

What is Lanthanolania in simple terms?

Why does Lanthanolania 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 Lanthanolania?

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 Lanthanolania.