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Orthomorpha coarctata : ウィキペディア英語版 | Orthomorpha coarctata
''Orthomorpha coarctata'' (alternately known as ''Asiomorpha coarctata'') is a widely-introduced species of Polydesmidan millipede of the family Paradoxosomatidae. It is presumed native to Southeast Asia but due to transport by humans occurs in tropical and sub-tropical areas throughout the world, including the Hawaiian Islands, the West Indies and Gulf Coast of North America.〔 p. 415〕 Males range from 14.5–20.5 mm in length and 1.5 to 2.7 mm wide while females are somewhat larger ranging from 16.5–27.5 mm long, and 1.6–3.2 mm wide.〔 ''O. coarctata'' can be distinguished from ''Oxidus gracilis'', another widely-introduced Asian millipede, by having proportionally longer and pointier paranota (lateral keels) on mid-body segments and longer gonopods (male reproductive appendages). ''O. coarctata'' is unique within the genus ''Orthomorpha'' in that the gonopods have a single, simple tip, while other species have two or three lobes. This distinction has led some authors to place ''O. coarctata'' in a separate, monotypic genus, ''Asiomorpha''.〔 ==References==
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