Tubeufiales » Wiesneriomycetaceae


Phalangispora Nawawi & J. Webster, Trans. Br. mycol. Soc. 79(1): 65 (1982).

Index Fungorum number: IF 9328; Facesoffungi number: FoF 07568, 4 morphological species (Species Fungorum 2022), 2 species with molecular data.

Mycelium at first subhyaline, later brownish-septate. Sexual morph: Unknown. Asexual morph: Conidiomata (sporodochia) pustulate or obconical, at first whitish, then olive-dry appearance with 1–5 setae. Setae brown or black, septate, wall thick subulate. Conidia rare, septate, constricted, brown (adapted from Nawawi and Webster 1982).

 Type species: Phalangispora constricta Nawawi & J. Webster

Notes: Phalangispora is characterised by sporodochial, pustulate or obconical conidiomata, and septate, constricted, brown conidia. Nawawi and Webster (1982) pointed out that even though Phalangispora was found from river foam, it is uncertain that it has an aquatic habitat since mycelium develops and forms conidia under water. Phalangispora resembles Wiesneriomyces and Speiropsis in having conidia with narrow isthmi between the cells or chains of unicellular conidia connected by an isthmi and holoblastic sympodial conidiogenesis. Phalangispora differs from Speiropsisis in that the latter lacks setae and is mononematal. Prasad and Bhat (2002) added P. bharathensis collected from decaying leaves of Holigarna arnottiana in Goa, India. Smits et al. (2007) reported P. nawawi on submerged leaf litter in Venezuela. Rajeshkumar (2014) re-appraised Phalangispora and reported P. bharathensis on leaf litter of Mangifera indica from the northern India. Moro et al. (2018) collected P. nawawi in rivers in Brazil. Guo et al. (2019) added P. sinensis based on morphology and multigene phylogeny of LSU, SSU, RPB2 and TEF1 gene sequence and confirmed the placement of Phalangispora in Wiesneriomycetaceae. Phalangispora resembles Setosynnema in having similar sporodochia bearing a few dark setae but differs in that the branches of conidia are branched while those of Setosynnema are unbranched. Phalangispora is morphologically and phylogenetically a distinct and well-defined genus in Wiesneriomycetaceae. Molecular markers available for Phalangispora include Phalangispora nawawii (ITS, LSU) and P. constricta (ITS, LSU, SSU, RPB2, TEF-1).


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