Arachnomyces

Sun, Bing-Da, Zhou, Yu-Guang, Chen, Amanda-Juan & Houbraken, Jos, 2019, Phylogeny and a new species of the genus Arachnomyces (Arachnomycetaceae), Phytotaxa 394 (1), pp. 89-97 : 95-96

Key to species of Arachnomyces

1. Ascomata produced homothallically; arthroconidial anamorph present or absent............................................................................2

1’ Ascocarp not produced or produced in mated cultures; arthroconidial anamorph present................................................................6

2. Setae coiled or circinate; anamorph absent or unknown....................................................................................................................3

2’ Setae straight and tapered; anamorph of alternate arthroconidia ........................................................................................ A. gracilis

3. Setae slightly nodose; ascospores mostly <3.5 μm long...................................................................................................................4

3’ Setae smooth; ascospores mostly> 3.5μm long.................................................................................................................................5

4. Ascospores are smooth....................................................................................................................................................... A. minimus

4’ Ascospores are echinulate ............................................................................................................................................. A. peruvianus

5. Ascomata 100–300 μm diam................................................................................................................................................ A. nitidus 5’ Ascomata 500–700 μm diam.......................................................................................................................................... A. sulphureus

6. Arthroconidia alternate, cylindrical to irregularly swollen................................................................................................................7

6’ Arthroconidia regularly swollen, in persistent chains......................................................................................................................10

7. Alternate arthroconidia cylindrical or barrel shaped, sclerotia present..............................................................................................8

7’ Alternate arthroconidia subglobose to pyriform, sclerotia absent......................................................................................................9

8. Colonies becoming greyish brown, growth is strongly inhibited at 35 oC ........................................................................ A. glareosus

8’ Colonies white to pale brown, growth is not inhibited at 35 oC ...................................................................................... A. scleroticus

9. Arthroconidia smooth to finely asperulate, setae smooth to slightly nodose .......................................................................... A. kanei

9’ Matured arthroconidia coarsely verrucose, setae strongly nodose....................................................................................... A. pilosus

10. Setae strongly nodose, tip circinate or loosely coiled .................................................................................................. A. nodosetosus

10’ Setae strongly nodose, tip straight..................................................................................................................................... A. jinanicus