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Aptery
Aptery is the anatomical condition of an animal completely lacking any kind of wings. An animal with this condition is said to be apterous. Most animal species belong to and are phylogenetic descendants of apterous taxa. These groups are said to be primarily apterous. Insects that are primarily apterous belong to the subclass Apterygota. Apterous is an adjective that means that the insect or organism is wingless and usually refers to a particular form of an insect that may have wings, or a wingless species in a group that typically has wings, e.g. many Orthoptera (grasshoppers and allies) and Hymenoptera (wasps). In some groups, one sex may be apterous while the other is winged, e.g. Mutillidae (velvet ants). In other cases a particular form of an insect (but not all individuals) will be apterous, e.g. some Tetrigidae (pygmy grasshoppers). Wingless animals which belong to or are phylogenetic descendants of winged taxa are said to be secondarily apterous. 5% of extant Pterygota are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apterygota
The name Apterygota is sometimes applied to a subclass of small, agile insects, distinguished from other insects by their lack of wings in the present and in their evolutionary history; notable examples are the silverfish, the firebrat, and the jumping bristletails. Their first known occurrence in the fossil record is during the Devonian period, 417–354 million years ago. The group Apterygota is not a clade; it is paraphyletic, and not universally recognized. As defined, the group contains two separate clades of wingless insects: Archaeognatha comprises jumping bristletails, while Zygentoma comprises silverfish and firebrats. The Zygentoma are in the clade Dicondylia with winged insects, a clade that includes all other insects, while Archaeognatha is sister to this lineage.A. Blanke, M. Koch, B. Wipfler, F. Wilde, B. Misof (2014) Head morphology of ''Tricholepidion gertschi'' indicates monophyletic Zygentoma. Frontiers in Zoology 11:16 doi:10.1186/1742-9994-11-16 The nymphs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
