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parapodium
The term parapodium (Gr. ''para'', beyond or beside + ''podia'', feet) refers to two different organs. In annelids, parapodia are paired, un-jointed lateral outgrowths that bear the chaetae. In several clades of sea snails and sea slugs, 'parapodium' refers to lateral fleshy protrusions.
==Polychaete parapodia==
Parapodia in polychaetes are either uniramous or biramous. In the latter case, the dorsal lobes or branches are called notopodia and the ventral branches neuropodia.
Both neuropodia and notopodia can bear cirri (called respectively neurocirri and notocirri) and setae (called respectively neurosetae and notosetae). The cirri between the two branches are called interramal cirri.
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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