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・ Ground radar
・ Ground reaction force
・ Ground rent
・ Ground resonance
・ Ground roll
・ Ground roller
・ Ground Round
・ Ground rule double
・ Ground rules
・ Ground sample distance
・ Ground segment
・ Ground sloth
・ Ground Snake
・ Ground speed
・ Ground speed radar
Ground spider
・ Ground squirrel
・ Ground stable barn
・ Ground start
・ Ground state
・ Ground State (Angel)
・ Ground station
・ Ground stone
・ Ground stop
・ Ground substance
・ Ground support equipment
・ Ground System Architectures Workshop
・ Ground tissue
・ Ground tit
・ Ground track


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Ground spider : ウィキペディア英語版
Ground spider

Ground spiders (family ''Gnaphosidae'') include nearly 2,000 described species in over 100 genera, distributed worldwide. This makes the family the seventh largest known. New species are still being discovered. They are closely related to ''Clubionidae''.〔Nieuwenhuys 2000〕
Common genera include ''Gnaphosa'', ''Drassodes'', ''Micaria'', ''Cesonia'', ''Zelotes'' and many others.
There are 105 species known to central Europe.〔Blick, T. et al. (2004).(Checklist of the spiders of Central Europe. (Arachnida: Araneae) ). Version 1. Dezember 2004. (PDF)〕
==Description==
Generally, ground spiders are characterized by having barrel-shaped anterior spinnerets that are one spinneret diameter apart. The main exception to this rule is found in the ant-mimicking genus ''Micaria''. Another characteristic is an indentation in the endites (paired mouthparts anterior and lateral to the labium, or lip). All ground spiders lack a prey-capture web and generally run prey down on the surface. They hunt at night and spend the day in a silken retreat.〔 The thick-walled egg sacs are guarded by the mother until the spiderlings hatch.〔

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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