Key to Acrocalymma species with asexual morph 1. Pycnidia without central ostiole......................................................................................................................................... A. bipolare 1. Pycnidia with central ostiole..............................................................................................................................................................2 2. Conidia without apical appendage......................................................................................................................................................3 2. Conidia with apical appendage...........................................................................................................................................................4 3. Conidia hyaline, subcylindrical, with three vertical eusepta............................................................................................. A. yuxiense 3. Conidia hyaline to brown, cylindrical to fusiform, 1–3 septate............................................................................................ A. vagum 4. Conidia> 5.5 µm wide.......................................................................................................................................................................5 4. Conidia 25 μm long, (25–)28–32(–35) μm...................................................................................................................... A. cycadis 6. Conidia <25 μm long.........................................................................................................................................................................7 7. Conidia with a small flattened central scar at base..................................................................................................................... A. fici 7. Conidia without a small flattened central scar at base.......................................................................................................................8 8. Conidia with appendage at each end............................................................................................................................ A. medicaginis 8. Conidia with appendage at one end....................................................................................................................................................9 9. Conidia 3–4 µm wide, with a mucilaginous helmet-shaped appendage........................................................................... A. aquatica 9. Conidia 1.5–2.5 µm wide, with a small flabellate apical appendage.......................................................................... A. guizhouense

Published as part of Shao, Qiu-Yu, Qi, Ying-Hua, Wang, Jing, Yang, Yan-Ming, Zhang, Zhi-Yuan, Chen, Wan-Hao, Liang, Jian-Dong, Liang, Zong-Qi & Han, Yan-Feng, 2022, Acrocalymma guizhouense sp. nov. (Acrocalymmaceae, Dothideomycetes) from soil in China, pp. 229-236 in Phytotaxa 558 (2) on page 234, DOI: 10.11646/phytotaxa.558.2.6, http://zenodo.org/record/7003013