ABSTRACT: We report structure and properties of fossil hyphae and spores from the Ordovician Guttenberg formation of Wisconsin. The fossils strongly resemble present-day arbuscular mycorrhizal fungi (Glomales) and are described as Palaeoglomus grayi gen. et spec. nov.

KEYWORDS: fossils, arbuscular mycorrhiza, earliest fungi

NOMENCLATURAL NOVELTIES:
Palaeoglomus D. Redecker, Kodner & L.E. Graham, p. 35
Palaeoglomus grayi D. Redecker, Kodner & L.E. Graham, p. 35