science

Invertebrate iridescent virus 31

Invertebrate iridescent virus 31 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 Invertebrate iridescent virus 31 rather than just read about it. In short: Invertebrate iridescent virus 31 (IIV-31, Iridovirus armadillidium1) , also called isopod iridovirus, is a species of invertebrate iridescent virus in the genus Iridovirus. Oniscidea (commonly known by a variety of names including woodlouse, pillbug, slater, roly-poly, potato bug, et al.) serve as hosts.

Key takeaways

Invertebrate iridescent virus 31 belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Invertebrate iridescent virus 31 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Invertebrate iridescent virus 31 from memory before moving on to harder problems.

Reference excerpt

Invertebrate iridescent virus 31 (IIV-31, Iridovirus armadillidium1) , also called isopod iridovirus, is a species of invertebrate iridescent virus in the genus Iridovirus. Oniscidea (commonly known by a variety of names including woodlouse, pillbug, slater, roly-poly, potato bug, et al.) serve as hosts. Infection is associated with decreased responsiveness in the host, increased mortality and the emergence of an iridescent blue or bluish-purple colour due to the reflection of light off a paracrystalline arrangement of virions within the tissues.

Taxonomy In earlier centuries, blue individuals of otherwise drab oniscidean species had been discovered. They were sometimes interpreted to be new subspecies and were described as such: Ligidium hypnorum coeruleum Lereboullet 1843 and L. hypnorum amethystinum Schöbl 1861 (in reference to cerulean and amethyst, respectively). In 1980, the first research was published showing that the phenomenon of blue oniscideans is in fact a disease caused by an iridovirus. The aforementioned 'subspecies' have since been reinterpreted, not as distinct taxonomic entities, but as historical findings of individuals infected with this isopod iridovirus. In 2014, the 220-kilobase genome sequence of this virus was published. Then in 2018 (as part of the 2018b taxonomy release), it was formally accepted as a species by the International Committee on Taxonomy of Viruses, named Invertebrate iridescent virus 31 and placed in the genus Iridovirus alongside the mosquito-hosted species Invertebrate iridescent virus 6.

Host range IIV-31 infects members of the suborder Oniscidea. In particular, it has been reported in the scientific literature from the following families and species:

Armadillidiidae (Armadillidium vulgare, A. decorum) Cylisticidae (Cylisticus convexus) Ligiidae (Ligidium hypnorum, L. koreanum) Oniscidae (Oniscus asellus) Philosciidae (Burmoniscus kathmandia, Philoscia affinis, P. muscorum) Platyarthridae (Niambia capensis) Porcellionidae (Porcellio dilatatus, P. laevis, P. siculoccidentalis, P. spinicornis, P. scaber, Porcellionides pruinosus) Trachelipodidae (Trachelipus rathkii) Trichoniscidae (Androniscus dentiger, Haplophthalmus danicus, H. mengii, Hyloniscus riparius, Trichoniscoides albidus, T. helveticus, Trichoniscus panormidensis, T. pusillus)

Geographic range This virus has a wide geographic distribution. In particular, it has been reported in the scientific literature from:

Asia (Japan, Turkey) Europe (former Czechoslovakia, France, Italy, the Netherlands, Russia, United Kingdom) North America (United States) Oceania (Australia)

Tentative fossil An oniscidean fossilised in Early Cretaceous Burmese amber was found that features iridescent blue patches. George Poinar Jr., an entomologist and palaeontologist studying this fossil, tentatively suggested that the colouration may represent an ancient case of IIV-31.

References

External links

iNaturalist – citizen science observations of Invertebrate iridescent virus 31

Illustrations

Worked examples

Example 1 — a first encounter with Invertebrate iridescent virus 31

Start with the simplest possible case. Write down what Invertebrate iridescent virus 31 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 Invertebrate iridescent virus 31 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 Invertebrate iridescent virus 31 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 Invertebrate iridescent virus 31

In research: Invertebrate iridescent virus 31 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 Invertebrate iridescent virus 31 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: Invertebrate iridescent virus 31 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Iridoviridae, so understanding it makes those chapters shorter.
In everyday life: Look for Invertebrate iridescent virus 31 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 Invertebrate iridescent virus 31 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Invertebrate iridescent virus 31 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 Invertebrate iridescent virus 31 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Invertebrate iridescent virus 31 in simple terms?

Why does Invertebrate iridescent virus 31 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 Invertebrate iridescent virus 31?

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 Invertebrate iridescent virus 31.