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4 days ago · Insect | Definition, Characteristics, Types, Beneficial, Pest, Classification, & Facts | Britannica. Home Science Bugs, Mollusks & Other Invertebrates Insects. insect. arthropod class. Also known as: Insecta. Written by. Vincent Brian Wigglesworth.
Mosquitoes, the Culicidae, are a family of small flies consisting of 3,600 species. The word mosquito (formed by mosca and diminutive -ito) [2] is Spanish and Portuguese for little fly. [3] .
Beetles are insects that form the order Coleoptera ( / koʊliːˈɒptərə / ), in the superorder Holometabola. Their front pair of wings are hardened into wing-cases, elytra, distinguishing them from most other insects.
Insects are the largest group of animals on Earth by far: about 926,400 different species have been described. They are more than half of all known living species. They may be over 90% of animal species on Earth. New species of insects are continually being found. Estimates of the total number of species range from 2 million to 30 million.
Insects are thought to have evolved from a group of crustaceans. 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.
Insect morphology - Wikipedia. Contents. hide. (Top) Anatomy summary. External. Internal morphology of different taxa. See also. References. External links. Insect morphology. Legend of body parts. Tagmata: A – Head, B – Thorax, C – Abdomen. antenna. ocelli (lower) ocelli (upper) compound eye. brain (cerebral ganglia) prothorax. dorsal blood vessel
Between 950,000–1,000,000 of all described animal species are considered insects, so over 50% of all described eukaryotes (1.8 million species) are insects (see illustration). With only 950,000 known non-insects, if the actual total number of insects is 5.5 million, they may represent over 80% of the total, and with only about 20,000 new ...
