A spider with unusual form “shield”, this species lives in Queensland, Australia.
The picture is not exceptional, I didn't want to use an higher ISO than 800 at 1/30th and +1EV (to light-up dark areas), and the environment was not the most stable, the spider web was moving in the slightest air movement. Thank you to Marion, Lionel and Yannick for their help and patience. Unfortunately, I don't have any photograph of the back of this spider.
More informations here.