Thanks Marlo Indeed it looks quite different from what we call A. brasiliana. Somehow I am not receiving message from Conch-L - I had to check if I had any replies directly on Conch-L website. Marcus >Marcus, > > > >I have only two juvenile specimens from Georgia. But, Bill has several good >photos at http://www.jaxshells.org/atlanticb.htm (look for Scapharca >brasiliana). > > > >I can photograph mine if you'd like. > > > >Marlo > >From: Marcus Coltro >Sent: December 06, 2010 > > > >Is there any subspecies of Anadara brasiliana in Texas? > >Shells from Texas are quite different from the ones from Brazil and >Venezuela. > >Specimens from Texas seems to be more granulose, having wider valves and >looks like their umbus never touch the other side. After the shell grows to >a certain size both valves touch on the umbus, preventing the shell to open. >It has to grind off the excess moving the valves sideways so it can be >opened again - this produces a hole in both valves - as seen on the right >specimen from Brazil. I guess since it lives on mud that hole would not put >the shell at risk from predators. > >Anyway, shells from Texas seems to be something else, not A. brasiliana. Has >anyone studied this group? Maybe Say was right calling it Anadara incongrua >(assuming the type is from this area) > >http://www.wonderphotos.com/shellphotos/anadara_brasiliana.jpg > >I've never had any specimens from US East coast - what do they look like? > >Marcus > > ---------------------------------------------------------------------- [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. ----------------------------------------------------------------------