Shirahama-ko (Sirahama Ko), Province of Awa (southern part of Chiba Prefecture), Japan
latitude: 34.900002 34°54'0.01"N
longitude: 139.899994 139°53'59.98"E
[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]
| Discocelis japonica Yeri & Kaburaki, 1918 | 1937 or earlier | |||
| Trigonoporus diversus (Yeri & Kaburaki, 1918) | 1944 or earlier | |||
| Notoplana delicata (Yeri & Kaburaki, 1918) | 1944 or earlier | |||
| Planocera purpurea Yeri & Kaburaki, 1918 | 1944 or earlier | |||
| Neoplanocera elongata Yeri & Kaburaki, 1918 | 1944 or earlier | |||
| Pseudoceros reticulatus Yeri & Kaburaki, 1918 | 1944 or earlier | |||
| Prosthiostomum marmoratum Yeri & Kaburaki, 1918 | 1944 or earlier | |||
| Prosthiostomum awaense Yeri & Kaburaki, 1918 | 1944 or earlier | A single specimen. | ||
| Prosthiostomum vulgaris Kato, 1938 | 1944 or earlier |
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