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Abstract
This paper summarizes eco-taxonomic progress since 2001. Five new natives were described and five new exotics recorded plus herein Megascolecid Amynthas rodericensis (Grube, 1879) is retrieved from historical records, Acanthodrilid Microscolex dubius (Fletcher, 1887) is a new Asian record and Lumbricid Dendrodrilus rubidus subrubicundus (Eisen, 1874) morph from Lake Biwa is added to checklist a total of 96 Megadrile earthworm species in eight families from Japan. Approximately 33 are natives and same number are exotics with the balance having insufficient information to decide their origins (e.g. for Eisenia japonica hiramoto Blakemore, 2012). Synonyms are provided especially for parthenogenetically affected morphs which can only be separated via their type DNA. Criodrilid Criodrilus bathybates Stephenson, 1917 is restored as originally described in Criodrilidae and its COI nucleotide barcode is for the first time presented on GenBank.