Abstract
Abstract The taxonomic status of the six Japanese species of Caridina described by W. Stimpson (1860) is clarified on the basis of fresh specimens from the type localities. Caridina grandirostris, which has long been synonymized under C. longirostris H. Milne Edwards, 1837, is shown to be a distinct species; C. leucosticta is redescribed; C. multidentata is the senior synonym of C. japonica De Man, 1892; C. acuminata and C. brevirostris are regarded as junior synonyms of Atyoida pilipes (Newport, 1847); and C. exilirostris is synonymized with C. typus H. Milne Edwards, 1837. Neotypes for the six species are designated to stabilize their taxonomy, all of which are redescribed and figured. The various nomenclatural problems associated with these species are discussed.
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