Portal:Insects
Insects (from Latin insectum, a calque of Greek ἔντομον [éntomon], “cut into sections”) are a class within the arthropods that have a chitinous exoskeleton, a three-part body (head, thorax, and abdomen), three pairs of jointed legs, compound eyes, and two antennae. They are among the most diverse group of animals on the planet and include more than a million described species and represent more than half of all known living organisms. The number of extant species is estimated at between six and ten million, and potentially represent over 90% of the differing metazoan life forms on Earth. Insects may be found in nearly all environments, although only a small number of species occur in the oceans, a habitat dominated by another arthropod group, the crustaceans. Template:/box-footer
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The Sirex woodwasp, Sirex noctilio, is a species of woood wasp, native to Europe, Asia and northern Africa. Adults vary in length from 9 to 36 millimetres (0.4 to 1.4 in). It is an invasive species in many parts of the world including Australia, New Zealand, North America, South America and South Africa, where it has become a significant economic pest of pine trees. It can attack a wide variety of pine species, although some species seem to be more susceptible than others, and it is often stressed trees that are attacked.During oviposition, the female wasp lays two eggs with or without a mucoid substance and a symbiotic fungus for the larvae to feed on once they hatch. The mucoid substance is toxic to trees and aids in tree decline. The ascospores from the symbiotic fungus Amylostereum areolatum are also pathogenic.
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- ... that only one side of the extinct parasitoid wasp Neanaperiallus is visible in its sole fossilised specimen?
- ... that the queen ant of the Acropyga acutiventris carries a mealybug Xenococcus annandalei in her jaws on her nuptial flight?
- ... that the only known specimen of the extinct planthopper Glisachaemus jonasdamzeni is preserved with a parasitic mite?
- ... that the extinct planthopper Tainosia quisqueyae was named for the Taíno people and Hispaniola?
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Mayflies (subimago of Rhithrogena germanica pictured) comprise around 2,500 species of insects which belong to the Order Ephemeroptera. They are aquatic insects whose immature stage usually lasts one year in fresh water, while the adults are short-lived, surviving from a few minutes to a few days.
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