100 



MICROTHYRIALES 



(2) Spores 2-celled 



(a) Spores hyaline; hyphopodia lacking 

 X. Paraphyses present 



y. Paraphyses lacking 



(b) Spores dark 



X. Hyphopodia present 

 (x) Paraphyses present 

 (y) Paraphyses lacking 

 y. Hyphopodia lacking 

 (x) Paraphyses present 

 (y) Paraphyses lacking 

 2. Scutellum with several hymenia beneath; spores 



2-celled, dark; paraphyses lacking 

 . Free mycelium present as a thalloid membrane, 

 radiately prosenchymic, rarely parasitic on 

 algae; hymenia several under each scutellum; 

 paraphyses lacking 



1. Mycelium a thallus with algae (Trentepohlia) ; 



spores filiform; paraphyses present 



2. Mycelium thalloid, without algae 



a. Mycelial membrane linear, branched 



(1) Spores 2-celled 



(a) Spores hyaline 



(b) Spores dark 



(2) Spores x-cellcd, hyaline 



b. Membranes rounded, mostly confluent 



(1) Spores 2-celled 



(a) Spores hyaline 



(b) Spores dark 



(2) Spores x-cel!ed, hyaline 



(3) Spores muriform, Iiyaline 



Lembosiopsis 24:440, TS 422 

 Aulographis 2:727, TS 422 



Lembosia 2:741, TS 422 

 Morenella 24:498, TS 423 



Echidnodes 24:498, TS 422 

 Echidnodella 24:498, TS 422 



Symphaster 24:490, TS 418; 21 



Subfamily Trichopelteae 

 Rhaphidocyrtis 



Trichopeltina 24:508, TS 426 

 Trichopeltella 24:508, TS 426 

 Trichopeltis 9:1068, TS 427; 21 



Brefeldiella 9:1063, TS 427 

 Pycnocarpum 24:509, TS 427; 



21 

 Phragmoscutella 

 Pycnoderma 24:433, TS 418 



Family 36. MICROPELTACEAE 



(Hemisphaeriaceae) 

 Theissen Ann. Myc. 11:469; TS 15:427 



Ascomata or apothecia typically superficial, without hypostroma, rarely sub- 

 cuticular, dimidiate, but the scutellum not radiate or sometimes at the margin only, 

 parenchymic or plectenchymic, regularly round, with an apical pore or astomous, 

 free mycelium usually lacking, occasionally superficial and reticulate, without hypho- 

 podia; hymenia single or several beneath the scutellum, hypothecium poorly de- 

 veloped, epithecium indistinct or lacking; asci one to many in a hymenium, mostly 

 clavate, paraphyses present or absent. 



A. Scutellum open reticulate, blue-green, radiate at 

 margin, typically without evident mycelium; 

 hymenium single Subfamily Dictyopeltineae 



1. Spores 1-celled, hyaline; paraphyses present Dictyothyrina 24:512, TS 429 



2. Spores 2-celled 



a. Spores hyaline 



(1) Paraphyses present; scutellum with pore Dictyothyrium 24:512, TS 429 



(2) Paraphyses lacking; scutellum astomous Dictyopeltis 24:513, TS 430 



b. Spores dark; paraphyses present Phaeaspis 



