Fungalpedia – Note 1314, Dwiroopa
Dwiroopa. Subram. & Muthumary.
Citation when using this data: Hyde KD et al. 2020 (in prep.) – Fungalpedia, Ascomycota.
Index Fungorum, Facesoffungi, MycoBank, GenBank
Classification: Dwiroopaceae, Diaporthales, Diaporthomycetidae, Sordariomycetes, Pezizomycotina, Ascomycota, Fungi
Notes – Members of Dwiroopa resemble Harknessia in having uni- to multiloculate, thick-walled, immersed to semi-immersed conidiomata, becoming erumpent, dark brown and aseptate, thick-walled macroconidia with holoblastic conidiogenesis, with conidiogenous cells bearing periclinal thickenings. Dwiroopa is distinguished from Harknessia in having distinct, holoblastic conidiogenesis, thick-walled conidiogenous cells and broadly spaced several longitudinal striations in the macroconidia, lacking a basal appendage and showcasing a dark scar with minute marginal frills at the conidial connection. Harknessia is distinct from Dwiroopa in having macroconidia that are smooth-walled or have closely spaced longitudinal raised bands on only one side and usually with a true basal appendage. Furthermore, Dwiroopa produces three different kinds of conidia viz. macroconidia, mesoconidia and phialoconidia (Farr & Rossman 2003), which are not produced in Harknessia. Farr & Rossman (2003) redescribed Dwiroopa ramya and designated it as a lectotype and also introduced Harknessia lythri as Dwiroopa lythri in Dwiroopa based on morphological similarities.
Type species: Dwiroopa ramya Subram. & Muthumary, Proc. Indian Acad. Sci., Pl. Sci. 96(3): 196 (1986).
Other accepted species: Species Fungorum – search Dwiroopa.
Figure 1 – Dwiroopa ramya (redrawn from Subramanian & Muthumary 1986). a Vertical section of conidioma. b Conidia. c-f Stages in the development of macroconidia. g Paraphysis-like structures. h Meso-conidia, note, developing and mature conidia. i Phialides with developing phialoconidia. j Phialoconidia. Scale bars: a = 100 μm, b = 20 μm, c, d, f-i = 10 μm, e, j = 5 μm.
References
Entry by
Kevin David Hyde, Institute of Plant Health, Zhongkai University of Agriculture and Engineering, Haizhu District, Guangzhou 510225, P.R. China, Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand, Mushroom Research Foundation, 128 M.3 Ban Pa Deng T. Pa Pae, A. Mae Taeng, Chiang Mai 50150, Thailand, Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand, Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Science, Kunming 650201, Yunnan, P.R. China, School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand, World Agroforestry Centre, East and Central Asia, Kunming 650201, Yunnan, P.R. China
Published online 28 February 2020