Mytilus trossulus?

[Emma]

Hello everybody!

In December I was in Copenhagen, Denmark, and on Amager Strand beach, 5 mins from Copenhagen city centre I found the following Mytilus specimens. I have done some research on the internet (I am not a Mytilus expert) and have found out that in the Copenhagen area Mytilus trossulus or a hybrid between Mytilus trossulus and Mytilus edulis is prevalent. I have taken pictures of all the Mytilus specimens I collected and I really need your help to decide whether they are Mytilus trossulus, Mytilus edulis or what the internet calls Mytilus edulis f. trossulus. I think that some of them are clearly (and based on the images I have found on pages like <!-- m --><a class="postlink" href="http://naturalhistory.museumwales.ac.uk/britishbivalves/browserecord.php?-recid=410">http://naturalhistory.museumwales.ac.uk ... -recid=410</a><!-- m -->) are Mytilus trossulus.

Please, can anybody help?

Many thanks!

Emma.

1. Trossulus



2. not sure


3. single valves, top view


4. single valves, first close-up


5. single valves, second close-up


6. single valves, third close-up


7. single valves, fourth close-up


8. single vales, inside view




9. Hinges








10. Other specimens: