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Insects are thought to have evolved from a group of crustaceans. [2] The first insects were landbound, but about 400 million years ago in the Devonian period one lineage of insects evolved flight, the first animals to do so. [1]
Insects are the only group of invertebrates that have evolved wings and flight. Insects first flew in the Carboniferous, some 300 to 350 million years ago, making them the first animals to evolve flight. Wings may have evolved from appendages on the sides of existing limbs, which already had nerves, joints, and muscles used for other purposes.
Sexual reproduction may have increased the rate of evolution. [52] By 1000 Ma First non-marine eukaryotes move onto land. They were photosynthetic and multicellular, indicating that plants evolved much earlier than originally thought. [53] 750 Ma Beginning of animal evolution. [54] [55] 720–630 Ma
Moses Harris publishes The Aurelian or Natural History of English Insects, namely Moths and Butterflies. This was the first book on the British Lepidoptera. Harris was a pioneer in using wing venation in insect systematics. A more modern revision did not appear until 1803. 1767 Voyages of the HM Bark Endeavour under Captain James Cook begin.
One position postulated insect wings evolved from pre-existing structures, while the second proposed insect wings were entirely novel formations. [1] [2] The “novel” hypothesis suggested that insect wings did not form from pre-existing ancestral appendages but rather as outgrowths from the insect body wall. [3]
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Adult insects typically move about by walking and flying; some can swim. Insects are the only invertebrates that can achieve sustained powered flight; insect flight evolved just once. Many insects are at least partly aquatic, and have larvae with gills; in some species, the adults too are aquatic
The ancestors of German cockroaches pestered people about 2,000 years ago far from Germany, a study found. Here’s how the critters achieved global domination.