1	Ascospores with two longitudinal germ slits	Scopinella
–	Ascospores with germ pores	2
2	Ascospores with a broad germ pore and a small basal appendage	3
–	Ascospores with a germ pore at each end	4
3	Ascomata with a crown of dark brown setae surrounding the ostiole	Setiferotheca
–	Ascomata without setae	Arxiomyces
4	Ascospores oblong or cylindric-fusiform, and germ pores crateriform	Syspastospora
–	Ascospores and germ pores otherwise	5
5	Ascomata ostiolate; neck long, composed of hyphae	6
–	Ascomata non-ostiolate or ostiolate; neck absent or short, conical, composed of angular cells similar to those of the ascomatal wall	7
6	Neck composed of irregularly arranged hyphae	Melanospora
–	Neck composed of parallel arranged hyphae	Vittatispora
7	Ascospores with indistinct germ pores	Pseudomicrothecium
–	Ascospores with conspicuous germ pores	8
8	Germ pores surrounded by hyaline structures	9
–	Germ pores without such structures	10
9	Germ pores with a raised rim	Dactylidispora
–	Germ pores with a blistered, rarely cushion-like structure	Pustulipora
10	Ascomatal wall cephalothecoid	Rhytidospora
–	Ascomatal wall not cephalothecoid	11
11	Ascomata dark, densely setose	Echinusitheca
–	Ascomata translucent, glabrous or surrounded by hyphae-like hairs	Microthecium