Littoraria appears to be a genus. I Googled the name and found this as one of the choices. http://www.itis.usda.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN <http://www.itis.usda.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&searc h_value=567035> &search_value=567035 Re: your second question - same place, ITIS http://www.itis.usda.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN <http://www.itis.usda.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&searc h_value=70394> &search_value=70394 _____ From: Olivier Caro [mailto:[log in to unmask]] Sent: Tuesday, October 25, 2005 12:31 AM To: [log in to unmask] Subject: Re: Florida Nodilittorina By the way, what is the level-value of Littoraria : genus, subgenus ? And, more generally... Any reliable resource somewhere regarding the syst. of Littorinidae ? (pdf, html, doc, xls...) Cheers Olivier Caro