Aeciospores are one of several different types of spores formed by

Rusts Rust is an iron oxide, a usually reddish-brown oxide formed by the reaction of iron and oxygen in the catalytic presence of water or air moisture. Rust consists of hydrous iron(III) oxides (Fe2O3·nH2O) and iron(III) oxide-hydroxide (Fe ...

. They each have two nuclei and are typically seen in chain-like formations in the

aecium An aecium (plural aecia) is a specialised reproductive structure found in some plant pathogenic rust Rust is an iron oxide, a usually reddish-brown oxide formed by the reaction of iron and oxygen in the catalytic presence of water or air mo ...

References

Fungal morphology and anatomy {{mycology-stub