Below is a request I posted several days ago.  Thanks to all who have
responded.  I have added a table (see website below) indicating the range
distribution of these shells in Florida based upon collecting data provided
by several collectors.  I would be happy to hear from others who have
live-collected these species in Florida so that a more definitive picture of
the occurrence of these species can be documented. The data so far indicates
that these species have distinctive ranges along Florida's coasts.

http://z14.invisionfree.com/Conchologist_Forum/index.php?showtopic=19&view=f
indpost&p=3375115 


"I have previously written about my difficulties with several Florida
Nodilittorina.  I recently updated my discussion based upon more recent
data. If anyone would like to review my conclusions and respond here or
personal email with comments, I'd appreciate it.  The focus of my difficulty
is distinguishing N. angustior (Mörch, 1876),  Echinolittorina riisei
(Mörch, 1876) and N. interrupta (Philippi, 1856), if indeed N. interrupta is
a separate species from E. riisei and at all occurs in Florida."

Marlo
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