Pleosporales » Macrodiplodiopsidaceae » Macrodiplodiopsis

Macrodiplodiopsis desmazieri

Macrodiplodiopsis desmazieri (Mont.) Petr., Annls mycol. 20(5/6): 343 (1922).

≡ Hendersonia desmazieri Mont., Annls Sci. Nat., Bot., sér. 3 12: 310 (1849).

           Index Fungorum number: IF 263056; Facesoffungi number: FoF 08293, Fig. 1

Description:

Saprobic on dead branches of Platanus. Sexual morph: unknown. Asexual morph: Conidiomata 950–1000 μm diam., 650–975 μm high (x̄ = 950 × 655 μm, n = 10), separate or gregarious, immersed, globose, papillate, dark brown to black, unilocular, thick-walled, with wall cells textura porrecta except at the base, where they are textura angularis. Ostiole central, single, circular, papillate. Conidiophores absent. Conidiogenous cells 13−25 × 3−5 µm, obclavate to cylindrical, wider at the base, annellidic, discrete, indeterminate, cylindrical, hyaline, arising from the inner cells of the pycnidial wall. Conidia 45−50 × 15−20 µm (x̄ = 47.3 × 18.2 µm, n = 20), ellipsoid to obovoid, or clavate, 3-distoseptate, with granular cytoplasm and much reduced lumina and often surrounded by dark brown wall deposits, continuous, pale brown, thick-walled, with truncate base and obtuse apex, surrounded by a thick gelatinous sheath.

Material examined: Italy, Forlì-Cesena Province: Modigliana, Montebello (Ibola Valley), on branches of Platanus acerifolia (Platanaceae), 15 April 2013, Erio Camporesi NNW-IT39 (MFLU 13-0090).

Fig. 1 Macrodiplodiopsis desmazieri (MFLU 13-0090). a Conidiomata on the host. b Close up of conidium. c Cross section of conidiomata. d Peridium. e−h Conidiogenesis. i−m Conidia. Scale bars: a = 2000 µm, b = 500 µm, c = 100 µm, d−n = 10 µm.

Importance and distribution

Macrodiplodiopsis comprises two species. Macrodiplodiopsis desmazieri is reported on Platanus sp. (Platanaceae) in Europe (Austria, England, Germany, Spain, Switzerland, United Kingdom), North America (Canada, The United States) and Union of Soviet Socialist Republics (USSR). Macrodiplodiopsis uniseptata has been found on fallen decorticated branches in South America (Ecuador).

 

References

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.

Glawe DA. 1985 – Hapalocystis berkeleyi and Macrodiplodiopsis desmazieresii in artificial culture. Mycologia 77, 880–886.

Shear CL, Davidson RW. 1936 – The life histories of Botryosphaeria melanops and Massaria platani. Mycologia 28, 476–482.

Wijayawardene NN, Camporesi E, Bhat DJ, Song Y et al. 2014 – Macrodiplodiopsis in Lophiostomataceae, Pleosporales. Phytotaxa 176, 192–200.

 

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