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
>
>

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