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Argiope trifasciata (Forsskal, 1775)
I should have mentioned that this spider is confirmed as being present in Iran by https://araneae.nmbe.ch/data/3866/Argiop....
Hi Ali Hemati Pour, what a great picture. This spider is a gravid female, very close to laying her eggs (between 400 and 1,400 eggs). If she is nearby, you might want to look again within a day or two so that you can see her egge sac which will be within a few inches of her web. Wonderful spotting. I was very happy to see it. Thank you.