Sordariomycetes families incertae sedis » Acrodictyaceae


Acrodictys M.B. Ellis


Sexual morph: Undetermined. Colonies on the substratum superficial, effuse, hairy or velvety, black. Mycelia mostly immersed, composed of branched, septate, smooth, pale brown hyphae. Sexual morph: Undetermined. Asexual morph: Hyphomycetous. Conidiophores macronematous, frequently bulbous at the base, mononematous, erect, straight or flexuous, thick-walled, smooth, typically indeterminate and proliferating percurrently. Conidiogenous cells monoblastic, integrated, terminal. Conidia solitary, dry, acrogenous, obovoid to pyriform, muriform; septa transverse and longitudinal, the transverse septa typically spanning the whole conidial width, the longitudinal septa typically incomplete, short; mid to dark-blackish brown, often with a graduation from lighter at the base to darker toward the apex, smooth, narrowly truncate at the base, seceding schizolytically.


Type species: Acrodictys bambusicola M.B. Ellis, Mycol. Pap. 79: 6 (1961)

Notes: Acrodictys was introduced by Ellis (1961), with A. bambusicola M.B. Ellis as the type species. There are 45 epithets listed in Index Fungorum (December 2018). Until 2016, identification of Acrodictys-like species was based on morphology. Xia et al. (2017) provided ITS, LSU, SSU and b-tubulin sequence data, detailed descriptions and illustrations for eight Acrodictys species, including a new species. Luo et al. (2019) introduced a new species and a new combination for this genus. Three Acrodictys species have been reported from freshwater habitats.


Freshwater species:

Acrodictys aquatica (N.G. Liu & K.D. Hyde) Z.L Luo & K.D. Hyde

Acrodictys fluminicola Luo et al.

Acrodictys liputii Cai et al.



Ellis MB. 1961 – Dematiaceous hyphomycetes. II. Mycological Papers 79, 1–23.

Hyde KD, Norphanphoun C, Maharachchikumbura SSN, Bhat DJ et al. 2020 Refined families of Sordariomycetes. Mycosphere 11(1): 305–1059.

Luo ZL, Hyde KD, Liu JK, Maharachchikumbura SSN et al. 2019 – Freshwater Sordariomycetes. Fungal Diversity 99, 451–660.

Xia JW, Ma YR, Li Z, Zhang XG. 2017 – Acrodictys-like wood decay fungi from southern China, with two new families Acrodictyaceae and Junewangiaceae. Scientific Reports 7, 7888.


About Freshwater Fungi

The webpage Freshwater Fungi provides an up-to-date classification and account of all genera of freshwater fungi.


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