biology

Procolophon

Procolophon 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 Procolophon rather than just read about it. In short: Procolophon (from Greek: πρό pró, 'before' and Greek: κολοφών kolophṓn, 'summit') is a genus of lizard-like procolophonid parareptiles that first appeared in the Early Triassic (Induan) of South Africa, Brazil, and Antarctica. It persisted through the Permian–Triassic extinction event, but went extinct in the beginning of the Early Middle Triassic.

Key takeaways

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

Reference excerpt

Procolophon (from Greek: πρό pró, 'before' and Greek: κολοφών kolophṓn, 'summit') is a genus of lizard-like procolophonid parareptiles that first appeared in the Early Triassic (Induan) of South Africa, Brazil, and Antarctica. It persisted through the Permian–Triassic extinction event, but went extinct in the beginning of the Early Middle Triassic.

History of discovery The first Procolophon fossil was discovered in the 1870s in Donnybrook, an area southwest of Pietermaritzburg in present-day Kwa-Zulu Natal of South Africa. The fossil was accessioned to Harry Seeley, who described the fossil in 1878. Nevertheless, the type species is P. trigoniceps, based on specimen NHMUK PV R 1726 from Tafelberg which was described by Richard Owen a year earlier after its donation by William Guybon Atherstone in 1875. Numerous other fossils have been recovered since from localities across the Eastern Cape and Free State provinces of South Africa.

Description Procolophon reached a length up to 30 centimetres (12 in), and is considered to have been a small herbivore or insectivore. The skull of Procolophon is distinct because of its latero-posteriorly facing paired cheek spikes, along with spiked dermal ossicles. Paleontologists debate the function of the cheek spikes. Some paleontologists posit that the bony protrusions were points for muscle attachments. Procolophon also had large eyes, and may have had acute night vision. Its teeth were peg-like and suitable for crushing plant matter. The front of the skull was short and blunt with the nasal opening very close to the mouth.

Classification Procolophon is a basal member of Procolophonidae, a clade of parareptiles that are closely related to larger, more derived parareptiles such as the pareiasaur, Bradysaurus. Procolophonids are also related to mesosaurids and millerettids. Procolophon was considered to share a sister-taxon relationship with Tichvinskia, a procolophonid from the lower Triassic of Russia. The cladogram below follows a phylogenetic analysis by Modesto and Damiani (2007) in which Procolophon is defined in polytomy with Thelerpeton and Leptopleuroninae:

In their phylogenetic analyses, Butler et al. (2023) defined Procolophon as a sister taxon to Teratophon and Thelerpeton or only to Teratophon within Procolophoninae. The results are shown in two cladograms below:

Correlation Procolophon occupied a wide geographic range. Fossils of the genus were found in the Lystrosaurus Assemblage Zone of the Katberg and Normandien Formations of South Africa, to the Sanga do Cabral Formation of the Paraná Basin in eastern Brazil, to the Fremouw Formation of the Transantarctic Mountains. Numerous subspecies and sister taxa are also found in the lower Triassic (Induan) of Germany, North America, and Russia.

References

External links Juan Carlos Cisneros (2008). "Taxonomic status of the reptile genus Procolophon from the Gondwanan Triassic". Palaeontologia Africana. 43: 7–17. ISSN 0078-8554. Archived from the original on 2024-02-14.

Illustrations

Worked examples

Example 1 — a first encounter with Procolophon

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

In research: Procolophon 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 Procolophon 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: Procolophon is common in secondary-school and first-year university syllabi. It links to neighbouring topics Beaufort Group, Fossil taxa described in 1876, Fossils of Antarctica, so understanding it makes those chapters shorter.
In everyday life: Look for Procolophon 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 Procolophon in 20 minutes

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

Frequently asked questions

What is Procolophon in simple terms?

Why does Procolophon 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 Procolophon?

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 Procolophon.