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Okinawa Island (Okinawa-jima, Great Nansei, Great Ryukyu), Japan
latitude: 26.700001
longitude: 128.183334
Precision of location: Alexandria Digital Library (with NGA GNDB data)
Site Named Here: By name of island, bay, strait, lake, river, or stream, etc., named in source publication
| Convoluta gracilis | 1981 | intertidal, tide pools, shallow lagoons | green algae | Enteromorpha, Monostroma and Ulva |
| Convoluta nitidae | 1981 | intertidal, tide pools, shallow lagoons | green algae | Enteromorpha, Monostroma and Ulva |
| Convoluta sp. 2 | prior to 1987 | |||
| Amphiscolops sp. 2 | prior to 1987 | |||
| Amphiscolops sp. 5 | prior to 1987 | |||
| Haplodiscus sp. | prior to 1987 | |||
| Praesagittifera gracilis | prior to 1987 | correct localities of this species in Okinawa Island not clarified. | ||
| Convoluta nitidae | prior to 1987 | correct localities of this species in Okinawa Island not clarified. | ||
| Dugesia japonica | 1974 or earlier | Okinawa (Ryukyu) Islands. |