Acrocalymma Alcorn & J. A. G. Irwin

Acrocalymma Alcorn & J. A. G. Irwin View in CoL View at ENA , Trans. Br. mycol. Soc. 88 (2): 163 (1987)

Notes.

Alcorn and Irwin (1987) introduced Acrocalymma to include A. medicaginis , which was recorded as a root pathogen on Medicago in Australia. Acrocalymma species show cosmopolitan distribution worldwide (e. g., Australia, China, Egypt, India, Spain, Thailand, and the United States). Their host specificity is also not yet determined and has been recorded from various host families (e. g., Amaranthaceae , Arecaceae , Cucurbitaceae , Cycadaceae , Fagaceae , Lamiaceae , Magnoliaceae , and Moraceae ) ( Trakunyingcharoen et al. 2014; Jayasiri et al. 2019; Dong et al. 2020; Mortimer et al. 2021; Tennakoon et al. 2021; Calabon et al. 2023; Konta et al. 2023). Most Acrocalymma species have been recorded as coelomycetous, and two species have sexual morph, A. pterocarpi and A. hongheense ( Jayasiri et al. 2019; Mortimer et al. 2021). The asexual morph exhibits papillate pycnidia and aseptate, hyaline conidia, which have appendages ( Trakunyingcharoen et al. 2014; Jayasiri et al. 2019; Dong et al. 2020), whereas the sexual morph has immersed or semi-immersed, globose to subglobose, ostiolate ascomata, cylindric-clavate asci, and hyaline, fusiform, 1 - septate ascospores with distinct sheath ( Jayasiri et al. 2019; Mortimer et al. 2021). To date, there are 19 Acrocalymma species in Species Fungorum (2025).