Entrophospora R.N. Ames & R.W. Schneid., emend. Oehl, Sieverd., Palenz. & G.A. Silva Figs 1–5

MycoBank number: MB 20223; Index Fungorum number: IF 20223; Facesoffungi number: FoF;

Emended description: Sporocarps unknown. Entrophosporoid spores form within the hyphal neck of tightly attached terminal or intercalary sporiferous saccules, singly in soils, or (rarely) in roots. Sporiferous saccules generally are larger in size than the underlying spores. Entrophosporoid spores are globose to subglobose and have two walls: an outer and an inner. Outer, semi-persistent to evanescent layers of the outer spore wall are the wall layers of the hyphal stalk and the sporiferous saccule. The structural, pigmented layer beneath does not continue within the hyphal wall but only for a short distance within the saccule terminus. Thus, spores have only one persistent cicatrix, which is proximal to the globose saccule terminus. A plug closes the pore towards the saccule. The inner wall is thick, finely laminated wall and forms de novo. No inner wall layers have a beaded appearance. Fungal structures in roots stain blue with trypan blue; forming vesicular-arbuscular mycorrhizae.

Type species: Entrophospora infrequens (I.R. Hall) R.N. Ames & R.W. Schneid.


  • Entrophospora infrequens