Ophiostomatales » Parasympodiellaceae


Parasympodiella Ponnappa, Trans. Br. mycol. Soc. 64(2): 344 (1975)

Hypocreomycetidae, Parasympodiellales, Parasympodiellaceae, Parasympodiella

Index Fungorum number: IF820298; 9 morphological species (Species Fungorum 2020); 4 species with sequence data.


Saprobic on leaves and twigs. Sexual morph: Undetermined. Asexual morph: Colonies effuse, cottony, partly superficial, greyish. Conidiophores mononematous, erect, conspicuous and properly differentiated from vegetative hyphae, flexuous, smooth, regularly septate, branched, brown. Conidiogenous cells smooth, pale brown or hyaline, holoblastic, multiplying sympodially, undergoing basipetal secession to produce conidia. Conidia thallic-arthric, aseptate or septate, hyaline, produced in unbranched pseudo-chains. Synasexual morph: often stylaspergillus-like (adapted from Hernández-Restrepo et al. 2017).



Type species: Parasympodiella laxa (Subram. & Vittal) Ponnappa, Trans. Br. mycol. Soc. 64(2): 344 (1975)



Notes: Parasympodiella was introduced by Ponnappa (1975), with P. laxa as the type species. The latter species was earlier placed in Sympodiella (Ponnappa 1975). However, whereas Sympodiella species have small conidiophores, up to 280 μm along with terminal or subterminal conidiogenous cells which give rise to conidial chains reaching up to six conidia, Parasympodiella species have larger conidiophores, reaching up to 700 μm, together with conidiogenous cells residing along the conidiophore stipe at irregular distances and conidia being produced in ever extending loose chains (Kendrick 1958). Parasympodiella includes distinct and solitary conidiophores with conidiogenous cells which extend sympodially and produce catenate, cylindrical, thallic conidia when the fertile hyaline branches disarticulate, characters which distinguish this genus from similar genera such as Polyscytalum (Riess 1853), Sympodiella (Kendrick 1958), Bahusakala (Subramanian 1958) and Neoscytalidium (Crous et al. 2006).



Species illustrated in this entry:

Parasympodiella laxa (Subram. & Vittal) Ponnappa


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