Harry & Andrew, Robert Forsyths book specifically states that ptycophora lacks a parietal denticle Geoff >From: "Harry G. Lee" <[log in to unmask]> >Reply-To: Conchologists List <[log in to unmask]> >To: [log in to unmask] >Subject: Re: Do all Allogona ptychophora lack parietal denticles? >Date: Sat, 14 Jul 2007 07:48:31 -0400 > >Dear Andrew, > >Pilsbry (1940: 881-892; figs. 509, 511) gives no indication of a parietal >denticle in this species or its close relatives. > >The person whom I hope you reach is Robert Forsyth, a Conch-L'er, Associate >of the Royal BC Museum, Victoria, and author of Terrestrial snails and >slugs of British Columbia ><http://www.geog.ubc.ca/biodiversity/efauna/LandSnails.html>. > >Harry > >Pilsbry, H. A., 1940. Land Mollusca of North America north of Mexico vol I >part 2. Academy of Natural Sciences, Philadelphia. vi + 575-994 + ix. Aug. >1. > >PS Available in full text .pdf are Robert's Terrestrial Gastropods of the >Peace River – Northern Rockies Region of British Columbia ><http://www.livinglandscapes.bc.ca/prnr/prnr_snails/PRNR-Snails.pdf> and >Terrestrial Gastropods of the Upper Fraser Basin of British Columbia ><http://www.livinglandscapes.bc.ca/upperfraserbasin/ufb_snails/UFB-Snails.pdf>. >HGL > > >At 05:28 AM 7/14/2007, you wrote: >>I bet Harry Lee will be the first to answer this... >> >>I collected several living & dead polygyrids, about 2.5cm in >>diameter, in forests during rain in the Kananaskis region of the >>southern BC Rockies this month. >> >>Back in NZ, I checked Abbott's Compendium and came up with Allogona >>ptychophora. Abbott's illustration shows no parietal denticle. >>However all of my 5 specimens have a denticle; in one it is extremely >>small but in others it is of decent size and spirally-aligned. >> >>I guess this is a variable character; it would take almost nothing >>for my small-denticled specimen to have had NO denticle. Does anyone >>know if Abbott chose an atypical specimen tio illustrate? >> >>---------------------------------------------------------------------- >>[log in to unmask] - a forum for informal discussions on molluscs >>To leave this list, click on the following web link: >>http://listserv.uga.edu/cgi-bin/wa?SUBED1=conch-l&A=1 >>Type your email address and name in the appropriate box and >>click leave the list. >>---------------------------------------------------------------------- _________________________________________________________________ Movie session times on Messenger - add Movie Scout today! http://ninemsn.com.au/share/redir/adTrack.asp?mode=click&clientID=785&referral=hotmailtagline0707&URL=http://www.yourmovies.com.au/messenger/signup/ ---------------------------------------------------------------------- [log in to unmask] - a forum for informal discussions on molluscs To leave this list, click on the following web link: http://listserv.uga.edu/cgi-bin/wa?SUBED1=conch-l&A=1 Type your email address and name in the appropriate box and click leave the list. ----------------------------------------------------------------------