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Longhorn beetle
The longhorn beetles (Cerambycidae; also known as long-horned or longhorn beetles or longicorns) are a cosmopolitan family of beetles, typically characterized by extremely long antennae, which are often as long as or longer than the beetle's body. In various members of the family, however, the antennae are quite short (e.g., ''Neandra brunnea'', figured below) and such species can be difficult to distinguish from related beetle families such as the Chrysomelidae. The family is large, with over 26,000 species described, slightly more than half from the Eastern Hemisphere. Several are serious pests. The larvae, called roundheaded borers, bore into wood, where they can cause extensive damage to either living trees or untreated lumber (or, occasionally, to wood in buildings; the old-house borer, ''Hylotrupes bajulus'', being a particular problem indoors). A number of species mimic ants, bees, and wasps, though a majority of species are cryptically colored. The rare titan beetle (''Titanus giganteus'') from northeastern South America is often considered the largest (though not the heaviest, and not the longest including legs) insect, with a maximum known body length of just over .
The scientific name of this beetle family goes back to a figure from Greek mythology. The shepherd Cerambos was transformed after an argument with nymphs into a large beetle with horns.
==Classification==
As with many large families, different authorities have tended to recognize many different subfamilies, or sometimes split subfamilies off as separate families entirely (e.g., Disteniidae, Oxypeltidae, and Vesperidae); there is thus some instability and controversy regarding the constituency of the Cerambycidae. There are few truly defining features for the group as a whole, at least as adults, as there are occasional species or species groups which may lack any given feature; the family and its closest relatives, therefore, constitute a taxonomically difficult group, and relationships of the various lineages are still poorly understood.〔Arnett, et al. (2002). ''American Beetles, Vol. 2.'' CRC Press, 861 pp.〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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