Colonies rather coarse and fast-growing. Spores produced within dark spherical sporangia that are borne along the length of sporangiophores on strongly curved or hooked branches. The filaments have few cross-walls and thus resemble long, hollow tubes. The most characteristic feature is the strongly hooked sporangial branch. Occurring in soil, dung, and decaying nuts. Ref: Hesseltine and Fennell 1955; Zycha and Siepmann 1970.