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True flies are insects of the order Diptera. The name is derived from the Greek di-= two, and ptera = wings. Most insects of this order have two wings (not counting the halteres, club-like limbs which are homologous to the second pair of wings found on insects of other orders).
Adults have both winged and wingless forms; in the grass thrips Anaphothrips obscurus, for example, the winged form makes up 90% of the population in spring (in temperate zones), while the wingless form makes up 98% of the population late in the summer. [79] Thrips can survive the winter as adults or through egg or pupal diapause. [14]
The name was originally coined in 1915 for a group of fossil orthopteroids, and largely forgotten until it was resurrected and redefined ("Notoptera Crampton sensu novum") by Engel and Grimaldi in 2004 (after the discovery of living Mantophasmatidae), who recommended to give a single order that includes both the living and fossil representatives of the lineage.
Belgica antarctica, the Antarctic midge, is a species of flightless midge, endemic to the continent of Antarctica.At 2–6 mm (0.08–0.2 in) long, it is the largest purely terrestrial animal native to the continent.
The insect order Zoraptera, commonly known as angel insects, contains small and soft bodied insects with two forms: winged with wings sheddable as in termites, dark and with eyes (compound) and ocelli (simple); or wingless, pale and without eyes or ocelli. They have a characteristic nine-segmented beaded (moniliform) antenna.
The primary characteristic of the apterygotes is they are primitively wingless. While some other insects, such as fleas, also lack wings, they nonetheless descended from winged insects but have lost them during the course of evolution. By contrast, the apterygotes are a primitive group of insects that diverged from other ancient orders before ...
The oriental cockroach (Blatta orientalis), also known as the waterbug (as they live in damp areas) or black cockroach (as their bodies are mostly dark), [1] is a large species of cockroach, adult males being 18–29 mm (23 ⁄ 32 – 1 + 5 ⁄ 32 in) and adult females being 20–27 mm (25 ⁄ 32 – 1 + 1 ⁄ 16 in). [2]
The Archaeognatha are an order of apterygotes, known by various common names such as jumping bristletails.Among extant insect taxa they are some of the most evolutionarily primitive; they appeared in the Middle Devonian period at about the same time as the arachnids.