Robillarda Sacc., Michelia 2(no. 6): 8 (1880)
Xylariomycetidae, Amphisphaeriales, Sporocadaceae, Robillarda
Saprobic or pathogenic on plants. Sexual morph: Undetermined. Asexual morph: Conidiomata pycnidial to pycnidioid, dispersed to gregarious, occasionally confluent, immersed to partly erumpent, unilocular to variably loculate with the locule often convoluted, glabrous; wall thick of textura angularis to textura prismatica. Conidiophores reduced to conidiogenous cells or with 1–2 supporting cells lining the cavity of the locule. Conidiogenous cells hyaline, separate, ampulliform to lageniform, smooth; multiplying
sympodially or percurrently near apex. Conidia composed of a conidium body and a separate apical cell modified into a branched appendage; conidium body ellipsoid or fusiform, 1-euseptate, wall smooth and occasionally constricted at the septum, hyaline to pale brown, often guttulate; apical cell short-cylindrical at base, then separating into 2–5 branches, branches thin-walled, tubular, ends pointed or swollen, flexuous, different, smooth, hyaline, devoid of contents (adapted from Maharachchikumbura et al. 2016).
Type species: Robillarda sessilis (Sacc.) Sacc., Michelia 2(no. 6): 8 (1880)
Notes: The genus was introduced by Saccardo (1880) and have flexuous, narrow tubular, aseptate appendages and holoblastic conidiogenous cells, proliferating sympodially or percurrently near the apex (Crous et al. 2015, Wijayawardene et al. 2016). Robillarda species have been reported worldwide, as saprobes (Wijayawardene et al. 2017, Farr & Rossman 2019). Most recently, Robillarda mangiferae was introduced from leaf blight on mango in Yunnan, China (Phookamsak et al. 2019).
Species illustrated in this entry:
Robillarda sessilis (Sacc.) Sacc.
Crous PW, Carris LM, Giraldo A, Groenewald JZ et al. 2015 – The genera of fungi-fixing the application of the type species of generic names–G 2: Allantophomopsis, Latorua, Macrodiplodiopsis, Macrohilum, Milospium, Protostegia, Pyricularia, Robillarda, Rotula, Septoriella, Torula, and Wojnowicia. IMA Fungus 6, 163–198
Farr DF, Rossman AY. 2019 – Fungal Databases, Systematic Mycology and Microbiology Laboratory, ARS, USDA. http://nt.arsgrin.gov/f ungaldatabases
Maharachchikumbura SSN, Hyde KD, Jones EBG, McKenzie EHC et al. 2016 – Families of Sordariomycetes. Fungal Diversity 79, 1–317
Phookamsak R, Hyde KD, Jeewon R, Bhat DJ et al. 2019 – Fungal diversity notes 929–1035: taxonomic and phylogenetic contributions on genera and species of fungi. Fungal Diversity 95, 1–273
Saccardo PA. 1880 – Fungi Gallici lecti a cl. viris P. Brunaud, Abb. Letendre, A. Malbranche, J. Therry vel editi in Mycotheca Gallica C. Roumeguéri. Series II. Michelia 2 6, 39–135
Wijayawardene NN, Goonasekara ID, Camporesi E, Wang Y et al. 2016 – Two new Seimatosporium species from Italy. Mycosphere 7, 204–213
Wijayawardene NN, Hyde KD, Rajeshkumar KC, Hawksworth DL et al. 2017 – Notes for genera: Ascomycota. Fungal Diversity 86, 1–594