biology

Ramalina dilacerata

Ramalina dilacerata 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 Ramalina dilacerata rather than just read about it. In short: Ramalina dilacerata, commonly known as punctured ribbon lichen, is a lichen species belonging to the family Ramalinaceae. The species was first described in 1796 as Lobaria dilacerata Hoffm., and later transferred to the genus Ramalina by Hoffmann in 1825.

Key takeaways

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

Reference excerpt

Ramalina dilacerata, commonly known as punctured ribbon lichen, is a lichen species belonging to the family Ramalinaceae. The species was first described in 1796 as Lobaria dilacerata Hoffm., and later transferred to the genus Ramalina by Hoffmann in 1825.

Description Ramalina dilacerata exhibits a fruticose growth form, with a pale yellowish-green thallus reaching up to 1.5(-2) cm in height. The thallus is erect to ascending and abundantly branched, firmly attached to the substrate by a basal holdfast, resulting in shrubby tufts up to 2 cm broad. The branches are less than 1 mm wide, inflated and hollow (fistulose), pellucid when wet, and bear a few to numerous small, elongated or rounded openings (fenestrations). The cortex is thin, while the medulla is white, very lax, especially beneath the apothecia, with sparse hyphae forming discontinuous bundles of chondroid tissue. Apothecia are frequently present, lecanorine in nature, with a greenish disc and a thin, smooth thalline margin. These reproductive structures are mostly situated subterminal on the smaller branches, subtended by a short, pointed spur. The asci are 8-spored, clavate, and of the Bacidia-type. The ascospores are 1-septate, hyaline, and shortly fusiform, measuring 12-15 x 4-6 μm. The photobiont associated with R. dilacerata is a chlorococcoid green alga.

Chemistry Spot tests on the thallus and medulla yield negative results for K, C, KC, and P. The thallus of Ramalina dilacerata contains usnic acid in the cortex, while the medulla is characterized by the presence of sekikaic acid, without any detectable amounts of homosekikaic or divaricatic acids.

Distribution and ecology The geographical range of R. dilacerata extends across North America, stretching from Alaska down to California and westward of the Cascade Mountain range. This lichen can also be found further inland, as far as western Montana. It thrives primarily in riparian forests and shrublands at low elevations, though it may occasionally occur in areas with strong oceanic influences, east of the Cascades. In Europe, records of R. dilacerata have been documented in a handful of locations across northern and central Italy, including the regions of Veneto, Trentino-Alto Adige, Abruzzo, Molise, Campania, and Basilicata. However, the species is considered extremely rare in the montane and subalpine belts of the Italian peninsula. Ramalina dilacerata typically colonizes the bark and twigs of acid-barked trees, especially conifers. More rarely, this lichen may also grow on lignum (woody material) in highly humid environments.

Conservation status Globally, Ramalina dilacerata is ranked as G5 by NatureServe, indicating that it is "secure" and commonly encountered throughout its range. In Canada, the species is classified as N5, meaning it is "common, widespread, and abundant" at the national level. At the provincial scale, its status varies from S1S3 (critically imperiled to vulnerable) in Newfoundland, to S5 (secure) in several other provinces. Within the United States, R. dilacerata has not been formally assessed, but it is known to occur in the state of Montana. In Italy, R. dilacerata is included in the national red list of epiphytic lichens as "Vulnerable" due to its extreme rarity in the montane and subalpine regions of the country.

Synonyms Synonyms for this species include:

Fistulariella dilacerata (Hoffm.) Bowler & Riefner Ramalina minuscula Nyl.

Illustrations

Worked examples

Example 1 — a first encounter with Ramalina dilacerata

Start with the simplest possible case. Write down what Ramalina dilacerata 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 Ramalina dilacerata 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 Ramalina dilacerata 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 Ramalina dilacerata

In research: Ramalina dilacerata 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 Ramalina dilacerata 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: Ramalina dilacerata is common in secondary-school and first-year university syllabi. It links to neighbouring topics Flora of Italy, Flora of the Northwestern United States, Lichens described in 1796, so understanding it makes those chapters shorter.
In everyday life: Look for Ramalina dilacerata 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.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “Ramalina dilacerata” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Ramalina dilacerata in 20 minutes

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

Frequently asked questions

What is Ramalina dilacerata in simple terms?

Why does Ramalina dilacerata 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 Ramalina dilacerata?

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 Ramalina dilacerata.