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Lumbricus rubellus
''Lumbricus rubellus'' is a species of earthworm that is related to ''Lumbricus terrestris''. It is usually reddish brown or reddish violet, iridescent dorsally, and pale yellow ventrally. They are usually about to in length, with around 95-120 segments. Their native distribution was mainland Europe and the British Isles, but they have currently spread worldwide in suitable habitats.〔( Introduced Species Summary Project: European Earthworm (''Lumbricus rubellus'') )〕
==Size and appearance==
''Lumbricus rubellus'', or the "red earthworm", ranges from to in length and has smooth, reddish, semi-transparent, flexible skin segmented into circular sections. Each segment contains four pairs of setae, or bristles, and the total number of segments per matured organism ranges from 95-105.〔Edwards, C.A., and Lofty J.R. 1972. Biology of earthworms. Halsted Press, New York, NY.〕 The segmentation of ''Lumbricus rubellus'' identifies the organism as a member of Phylum Annelida, while the enlarged segments towards the anterior of the organism called the clitellum denotes membership to Class Clitellata. Members of this class are also defined by having permanent gonads.
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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