Fungalpedia – Note 3155, Dichotomophthoropsis

 

Dichotomophthoropsis M.B. Ellis, Mycological Papers 125: 20 (1971).

Citation when using this data: Jian Ma et al. 2024 – Fungalpedia.

Index Fungorum, Faceoffungi, MycoBank, GenBank, Fig 1.

Classification: Incertae sedis, Incertae sedis, Incertae sedis, Incertae sedis, Pezizomycotina, Ascomycota, Fungi.

Notes: Dichotomophthoropsis was erected by Ellis (1976), with D. nymphaearum as the type species based on morphological characteristics. Dichotomophthoropsis currently comprises two species: D. nymphaearum and D. safeeulaensis, which were found on Nymphaea odorata, N. pubescens, N. stellata and Oryza sativa in America and India (Ellis 1976; Rasheed et al. 1990). Dichotomophthoropsis is characterized by macronematous or semi-macronematous, septate, branched, subhyaline to pale brown conidiophores that are often dichotomously or trichotomously forked, polytretic, discrete, terminal or lateral, lobed conidiogenous cells, and solitary, coiled, multi-septate, echinulate conidia that are constricted at the septa (Ellis 1976; Rasheed et al. 1990). Dichotomophthoropsis differs from other helicosporous taxa due to its unique conidiophores and conidia (Linder 1929; Zhao et al. 2007). Interestingly, Dichotomophthoropsis nymphaearum, Laocoon paradoxus and Mycelephas robustus, all exhibit echinulate conidia (Ellis 1976; David 1997; Gams et al. 2009).

Type species: Dichotomophthoropsis nymphaearum (F.V. Rand) M.B. Ellis, Mycological Papers 125: 22 (1971).

Other accepted species: Species Fungorum – search Dichotomophthoropsis.

Figure 1 – (a) Delortia palmicola (redrawn from Seifert et al. (2011)); (b) Dichotomophthoropsis nymphaearum (redrawn from Seifert et al. (2011)); (c) Diplorhynchus bilobus (redrawn from Arnaud (1952)); (d) Everhartia hymenuloides (redrawn from Seifert et al. (2011)).

 

References

David JC. 1997 – A contribution to the systematics of Cladosporium: revision of the fungi previously referred to Heterosporium. CAB International.

Ellis M. 1976 – More dematiaceous hyphomycetes. Commonwealth Mycological Institute, Kew.

Gams W, Seifert K, Morgan-Jones GA. 2009 – New and validated hyphomycete taxa to resolve nomenclatural and taxonomic issues. Mycotaxon 110(1):89–108.

Linder DH. 1929 – A monograph of the helicosporous fungi imperfecti. Annals of the Missouri Botanical Garden 16(3):227–388.

Rasheed A, Sheeba T, Bhat D. 1990 – An undescribed species of Dichotomophthoropsis on rice from India. Mycologia 82(3):390–392.

Zhao G, Liu X, Wu W. 2007 – Helicosporous hyphomycetes from China. Fungal Diversity 26:313–524.

 

Entry by

Jian Ma, School of Food and Pharmaceutical Engineering, Guizhou Institute of Technology, Guiyang 550003, P.R. China, Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand, School of Science, Mae Fah Luang University, Chiang Rai, 57100, Thailand.

 

Published online 10 September 2026

 

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