A. aetherea is similar in appearance to A. keyserlingi, however female A. aetherea are generally larger than A. keyserlingi. Like most orb-web spiders, A. aetherea shows considerable sexual size dimorphism, with females being many times larger than males.
A. aetherea bears a resemblance to A. keyserlingi in appearance, but female A. aetherea tend to be more substantial than A. keyserlingi. Orb-web spiders generally display pronounced sexual size differences, with females being substantially greater than males.