PTERIOIDAPTERIOIDA
| North Vietnam 1974 | Malta 2003 |
 |
 |
|---|---|
| Akoya Pearl Oyster Pteria martensii (Pteriidae) |
Cat's Paw Scallop Chlamys pesfelis (Pectinidae) |
Pterioida is different in size of the adductor (so-called adductor muscle) of before and after, and Pterioida is a thing that the back adductor was big or that has only the back adductor.
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