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pictured rove beetle
The pictured rove beetle (''Thinopinus pictus'') is a wingless rove beetle which lives on the sandy beaches of the West Coast of the United States from southern Alaska to Baja California. They are nocturnal, and emerge at night from temporary sand burrows to feed on beach hoppers (''Orchestoidea'').
==Identification==
Like other rove beetles, ''T. pictus'' has shortened elytra, so that most of its abdomen is exposed. Males average , females average . Males possess a cleft in the last abdominal sternite, which makes them readily discernible from females.〔 Their cryptic coloration varies geographically in response to lighter colored sand in the southern part of their range. Populations north of central California tend to be darker in response to the dark volcanic sand, while those in the southern range are quite pale. Because of this variation, ''T. pictus'' was once thought to be made up of two subspecies.〔
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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