Resolving Tiarosporella spp. allied to Botryosphaeriaceae and Phacidiaceae Author Crous, Pedro W. CBS-KNAW Fungal Biodiversity Centre, Uppsalalaan 8, 3584 CT Utrecht, The Netherlands; & Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria 0002, South Africa & Microbiology, Department of Biology, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands Author Müller, Michael M. Natural Resources Institute Finland (LUKE), P. O. Box 18, FIN- 01301 Vantaa, Finland Author Sánchez, Romina M. Centro de Recursos Naturales Renovables de la Zona Semiárida-Universidad Nacional del Sur Camino La Carrindanga Km 7, B 8000 FWB, Bahía Blanca, Argentina Author Giordano, Lucrecia Centro de Recursos Naturales Renovables de la Zona Semiárida-Universidad Nacional del Sur Camino La Carrindanga Km 7, B 8000 FWB, Bahía Blanca, Argentina Author Bianchinotti, M. Virginia Centro de Recursos Naturales Renovables de la Zona Semiárida-Universidad Nacional del Sur Camino La Carrindanga Km 7, B 8000 FWB, Bahía Blanca, Argentina Author Anderson, Freda E. Centro de Recursos Naturales Renovables de la Zona Semiárida-Universidad Nacional del Sur Camino La Carrindanga Km 7, B 8000 FWB, Bahía Blanca, Argentina Author Groenewald, Johannes Z. CBS-KNAW Fungal Biodiversity Centre, Uppsalalaan 8, 3584 CT Utrecht, The Netherlands; text Phytotaxa 2015 2015-03-12 202 2 73 93 http://dx.doi.org/10.11646/phytotaxa.202.2.1 journal article 10.11646/phytotaxa.202.2.1 1179-3163 13641335 Marasasiomyces Crous , gen. nov. MycoBank MB811252 Etymology:— Named after Walter Friedrich Otto Marasas, who collected this fungus in the Karoo, South Africa . Distinguished from Tiarosporella by having conidiomata with long necks, covered in brown setae, and having holoblastic conidiogenesis. Similar to Eutiarosporella , but conidiomata not in clusters. Conidiomata pycnidial, dark brown to black, rostrate with elongated necks, covered in brown, simple, septate, smooth to verruculose setae. Conidiophores reduced to conidiogenous cells. Conidiogenous cells lining the inner cavity, holoblastic, determinate, cylindrical, hyaline, smooth. Conidia solitary, hyaline, smooth, thin-walled, straight, fusiform, apex obtuse, base truncate, with a cone-like mucoid apical appendage. Type species:— Marasasiomyces karoo (B. Sutton & Marasas) Crous