Name requested: Microsphaera extensa

	Annales Mycologici 12 (1): 9.
	Mycotaxon 15: 130.

Homotypic synonym: Microsphaera penicillata var. extensa

Mycologia 44 (4): 573.

Homotypic synonym: Microsphaera alni var. extensa

Mycologia 32 (3): 340. 44 (4): 573.