Collecting site
Shibukawa, Tamano, Okayama Prefecture, Japan
latitude: 34.450001 34°27'0"N
longitude: 133.899994 133°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]
Collected here:
Convoluta naviculae Yamasu, 1982 | 1969 | | Sargassum | |
Convoluta naikaiensis Yamasu, 1982 | 1982 or earlier | | fine granite sand | "about one and a half meters below the neap tidal level all the year around". Spring and summer bring big populations that appear as a dark green to black belt about 1 meter wide parallel to the shore. "Major habitat". |
Praesagittifera naikaiensis (Yamasu, 1982) | prior to 1982 | | | |