OK friends, your help was valuable with this Plesio. Thanks!

Olivier

Le 06/02/2013 02:10, Ron G. Noseworthy a écrit :
> Hi, Raymond and Olivier!
>
> The first gastropod may be Plesiotrochus acutangulus (Yokoyama, 1924).  Check Kyoto Museum website (http://www.museum.kyoto-u.ac.jp/collection/Shell/Shell00000017_1.htm ) and the Japanese microseashell website (http://bigai.world.coocan.jp/pic_book/data01/a0924.html ).  WoRMS accepts this as a valid species, but it has been synonymized with P. souverbianus Fischer, 1878.  (See the gastropod catalogue ( http://www.gastropods.com/9/Shell_16599.shtml ) for some comparisons.  The original descriptions may be obtained from the Biodiversity Heritage Library.
>
> All the best from Korea!
> Ron Noseworthy

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