Fungalpedia – Note 517, Johnalcornia
Johnalcornia Y.P. Tan & R.G. Shivas
Citation when using this data: Tibpromma et al. 2024 (in prep.) – Fungalpedia, Ascomata.
Index Fungorum, Facesoffungi, MycoBank, GenBank, Fig. 1
Classification: Pleosporaceae, Pleosporales, Pleosporomycetidae, Dothideomycetes, Pezizomycotina, Ascomycota, Fungi.
Based on the combined multilocus alignment (ITS, GAPDH, LSU, and TEF-1α) and ultrastructural analyses, Tan et al. (2014) introduced Johnalcornia as a monotypic genus within Pleosporaceae and Pleosporales in Dothideomycetes with the type species Johnalcornia aberrans. Johnalcornia is characterized by cylindrical, solitary or in fascicles, straight to flexuous conidiophores, proliferating sympodially, cylindrical, smooth to verruculose, with thickened and conspicuous scars conidiogenous, straight to curved, solitary, distoseptate, first conidial septum median or submedian, second conidial septum delimiting the apical cell, third septum basal conidia, globose with a short neck ascomata, cylindrical to fusoid asci, tightly coiled, filiform, hyaline ascospores. Conidia germinate from polar cells (Tan et al. 2014). No other species have been introduced to this genus, which remains monotypic.
Type species: Johnalcornia aberrans (Alcorn) Y.P. Tan & R.G. Shivas
Other accepted species: This genus is monotypic.
Figure 1 – Morphology of Johnalcornia aberrans. a Conidiogenous cell giving rise to conidium. b–d Conidia. Scale bars: a – d = 10 μm. Redrawn from Tan et al. (2014).
Reference
Entry by
Zhang X, Excellence Center of Microbial Diversity and Sustainable Utilization, Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand; Center for Yunnan Plateau Biological Resources Protection and Utilization, College of Biological Resource and Food Engineering, Qujing Normal University, Qujing, Yunnan 655011, China
(Edited by Saowaluck Tibpromma, Samaneh Chaharmiri-Dokhaharani, & Achala R. Rathnayaka)
Published online 9 December 2024