New records of semiaquatic species Marionina (Clitellata, Enchytraeidae) from Japan, with a description of Marionina biwaensis sp. nov.

Authors : Takaaki TORII

Pages : 15-24

Doi:10.3906/sag-1203-92

View : 13 | Download : 11

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :Marionina biwaensis sp. nov. is described from Lake Biwa. This new species differs from all other Marionina species: lacking lateral chaetae completely and ventral chaetae in II, segment number 38-43, origin of dorsal blood vessel XV or XVI, spermathecal ampullae with irregular protuberances and chaetal distribution 1 per postclitellar bundles. In addition, the descriptions of M. coatesae, M. nevisensis, and M. riparia are augmented and recorded here for the first time in Japan.
Keywords : Key words Clitellata, Enchytraeidae, Marionina, Marionina biwaensis sp n, Japan