Draga Slavice, po mom je to Atrina pectinata, pretpostavljam da se radi o dnu koje nije regularno izlozeno kocarenju? Jer ovo je vrlo stara jedinka. Bilo bi super ako mozes dodati mjerilo ili reci kojih je dimenzija. U sjevernom Jadranu tako velikih nisam vidjela ali tamo ih redovito koce posisaju. Lijepi pozdrav, Tatjana

Dear Slavica, I would say it is Atrina pectinata, I assume that the bottom there is not regularly subjected to trawling? Because this is an old adult. It would be super if you can tell what is the size of the specimen. In the northern Adriatic I have never seen such a big individuals, but there the bottom is subjected to regular trawling, Best regards, Tatjana

Atrina fragilis or Pinna rudis.

I tend to Atrina fragilis, this species is more common and no cross structures are visible on your shells. However, your specimen is a dead shell and maybe eroded.

draga Tatjana upravo kao sto ste rekli. Izlovljena je iz Boke gdje je kočarenje zabranjeno sem jedog poteza godišnje u naučne svrhe.

Dear Tatjana just as you said. In the Boka Bay trawling is forbidden except ones a year for scientific purpose. thank you and best regards

In the book I used Alf & Haszprunar (2015): Mittelmeer-Mollusken Atrina pectinata is synonymised with Atrina fragilis. In WORMS both species are accepted, however:

Huber (2010) listed both species, but Atrina pectinata distributed in the Indian Ocean and A. fragilis in the North Atlantic and Med Sea.

Thank you dr Zettler very much