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We report six freshwater ostracods from Rishiri Island, Hokkaido, Japan: Cypricercinae sp., Cavernocy-pris sp. 1, Ca. sp. 2, Cypridopsis vidua, Candonini sp., and Metacypris cf. digitiformis. This is the first report of freshwater ostracods from this island. We provided brief descriptions of their morphology, presented partial nucleotide sequences for their mitochondrial cytochrome c oxidase subunit I (COI) and/or nuclear 18S rRNA genes, and determined a partial 16S rRNA sequence for the endosymbiotic bacterium Cardinium in some species. A key to six species collected from this island was presented. [ABSTRACT FROM AUTHOR]

We first report the gooseneck barnacle, Conchoderma auritum (Linnaeus, 1767), from Rishiri Island, Hokkaido, northern Japan. The barnacles we found were attached to the left tooth of a Stejneger' s beaked whale, Mesoplodon stejnegeri True, 1885 (Cetacea: Ziphiidae), which was stranded on the rocky shore of Cape Kutsugata, western Rishiri Island, on 11 April 2015. We provide a description of their morphology, and present a mitochondrial 16S rRNA barcode sequence. [ABSTRACT FROM AUTHOR]