Chromosomes of Temnocephala minor, an ectosymbiotic turbellarian on Australian crayfish found in Kagoshima Prefecture, with karyological notes on exotic turbellarian found in Japan.
Records of exotic turbellarian species found in Japan are reviewed from taxonomic and karyological viewpoints. Temnocephala minor, an ectocommensal on freshwater crayfish Cherax tenuimanus (introduced from Western Australia) is reported from Kagoshima Prefecture, Japan. T. minor was shown to have a chromosome number of 2x=18. The following 3 species of freshwater triclads were recorded from tanks and ponds used for tropical fish culture: Dugesia austroasiatica (2x=16), Dugesia tigrina (2x=16) and Rhodax sp. (3x=24; 3x=24 &3x + 1LB + 1SB=25 + 1SB). The following 3 species of exotic terrestrial triclads were recorded: Bipalium nobile (2x=10), Bipalium kewense (2x=18), and Platydemus manokwari (n=6, 2x=12).