science

Weraroa

Weraroa is a science 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 Weraroa rather than just read about it. In short: Weraroa was a genus of mushrooms from the families Hymenogastraceae and Strophariaceae. The genus was initially described by mycologist Rolf Singer in 1958 to accommodate the single species Secotium novae-zelandiae reported by Gordon Herriott Cunningham in 1924.

Key takeaways

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

Reference excerpt

Weraroa was a genus of mushrooms from the families Hymenogastraceae and Strophariaceae. The genus was initially described by mycologist Rolf Singer in 1958 to accommodate the single species Secotium novae-zelandiae reported by Gordon Herriott Cunningham in 1924. It was thought that the genus represented an intermediary evolutionary stage between a hypogeous (underground) ancestor and the related epigeous (above ground) genus Stropharia. Advances in phylogenetics and taxonomic changes since 1958 found it contained unrelated species from multiple genera. It is now considered a synonym of the genus Psilocybe.

Description The following descriptions may not represent all species formerly the genus.

Macroscopic Weraroa contained secotioid fungi, meaning that the margin of the pileus rarely breaks free of the stipe, making them resemble somewhat a pouch on the end of a stem, or stalked-puffball. The peridium (outer wall), which at maturity is glutinous, may range in shape from fusoid to spherical to ovoid or ellipsoid. The gleba consists of elongated loculi that are various shades of brown. The stipe may also be glutinous, and is continuous with a columella reaching and merging with the upper peridium, often with a thin veil-like structure that joins the edge of the peridium with the top of the stipe. The context is fleshy and may be gelatinous in the outer portion of the peridium. Cunningham was first to report that the mushroom takes a long time to mature, and specimens can also persist for long times.

Microscopic Spores are typically from 10 to 20 μm in diameter, ellipsoid in shape, smooth, and pigmented ochre to brownish. The basidia (usually 4-spored) often envelop their sterigmata in gastroid-like fashion (i.e., enclosed), and may be narrower in the middle with a broader base. Chrysocystidium are present on the hymenium, on the sterile surfaces of young specimens, and as endocystidia.

Habitat and distribution Species are usually found in rainforests or wet grasslands, growing on the ground or on wood; species of Weraroa have been found in New Zealand and the United States.

Accepted species Few records of these species exist; it is unlikely they truly belong in the genus Weraroa (synn. Psilocybe).

Weraroa coprophila A.H. Sm. (1956) Weraroa nivalis A.H. Sm. (1965) Weraroa patagonica Singer & J.E. Wright (1959) Weraroa spadicea Singer (1959)

Former species Weraroa cucullata (Shope & Seaver) Thiers & Watling (1971) was transferred out of this genus into Leratiomyces as Leratiomyces cucullatus (Shoppe & Seaver) Beever & D.-C. Park (2008). Weraroa erythrocephala (Tul. & C. Tul.) Singer & A.H. Sm. (1958) was also transferred into Leratiomyces as Leratiomyces erythrocephalus (Tul. & C. Tul.) Beever & D.-C. Park (2008). Weraroa novae-zelandiae (G. Cunn.) Singer (1958), the type species of the genus, was transferred into Psilocybe as Psilocybe weraroa Borov., Oborník & Noordel (2011). Phylogenetic research conducted from 2008 on demonstrated a close relationship between W. novae-zelandiae and the blue-staining Psilocybe in the phylogenetic Cyanescens clade, including Psilocybe cyanescens and Psilocybe subaeruginosa. Around this time research was also demonstrating that the genus Psilocybe was polyphyletic, and that the blueing and non - blueing species belonged in separate genera. As the blueing group did not contain the type species, and because W. novae-zelandiae was the type species for Weraroa, all of the blue-staining Psilocybe species could at that point have been transferred into Weraroa. However, the generic name Psilocybe was conserved for the blueing group with the type species decided as Psilocybe semilanceata (Fr.) P. Kumm (1871). W. novae-zelandiae was, therefore, classified as Psilocybe under the new name (nomen novum) Psilocybe weraroa. The name Weraroa novae-zelandiae was already in use by what is now Deconica novae-zelandiae (Guzmán & E. Horak) J.A. Cooper (2012). Weraroa virescens (Massee) Singer & A.H. Sm. (1958) became Clavogaster virescens (Massee) J.A. Cooper (2015), restoring the 1896 genus Clavogaster with a type species. The former type, Clavogaster novozelandicus Henn (1896) had become a later synonym of C. virescens.

References

External links

“Hey Man, Do they grow any Weraroa around here?” by Peter Werner Weraroa in Landcare Research NZFUNGI database

Illustrations

Worked examples

Example 1 — a first encounter with Weraroa

Start with the simplest possible case. Write down what Weraroa claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, 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 Weraroa 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 Weraroa 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 Weraroa

In research: Weraroa appears in science 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 Weraroa 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: Weraroa is common in secondary-school and first-year university syllabi. It links to neighbouring topics Fungi of New Zealand, Fungi of North America, Hymenogastraceae, so understanding it makes those chapters shorter.
In everyday life: Look for Weraroa 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 Weraroa in 20 minutes

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

Frequently asked questions

What is Weraroa in simple terms?

Why does Weraroa matter?

Because it connects several science 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 Weraroa?

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 Weraroa.