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Dictyosporiaceae fam. nov.

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Abstract

Dictyosporiaceae fam. nov. is introduced to accommodate a holomorphic group of Dothideomycetes that are saprobes on decaying wood and plant debris in terrestrial and freshwater habitats. The sexual morph comprises Dictyosporium meiosporum, D. sexualis, Gregarithecium curvisporum, Pseudocoleophoma calamagrostidis and P. polygonicola. The sexual morphs are characterized by immersed to erumpent, superficial, globose to subglobose, dark brown to black ascomata, bitunicate asci, and septate, hyaline, sheathed ascospores. The asexual morphs are hyphomycetous with brown, multi-septate, cheirosporous conidia, produced from holoblastic conidiogenous cells, on micronematous conidiophores. Phylogenetic analyses of LSU, SSU and TEF1 sequence data place the genera with cheirospores in a monophyletic clade in the order Pleosporales. Phylogenetic analyses based on ITS sequence data show the family to comprise 44 distinct lineages that correspond to ten genera and an undetermined genus. Four new genera Dictyocheirospora, Dictyopalmispora, Jalapriya and Vikalpa, and eight new species Dictyocheirospora bannica, D. rotunda, D. vinaya, Dictyopalmispora palmae, Dictyosporium olivaceosporum, D. sexualis, Jalapriya pulchra, and Vikalpa lignicola, are introduced in the family.

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Acknowledgments

The authors thank the Training Grant BRT R_251181, BRT R_253012, the Mushroom Research Foundation (MRF), Chiang Rai, Thailand and the Thailand Research Fund TRG5880152 for partially supporting this study. Kevin D. Hyde thanks the Chinese Academy of Sciences, project number 2013T2S0030, for the award of Visiting Professorship for Senior International Scientists at Kunming Institute of Botany. Further, K. Tanaka would like to thank the Japan Society for the Promotion of Science (JSPS 25440199 and 26291084) and Hirosaki University Grant for Exploratory Research by Young Scientists and Newly appointed Scientists for financial support. This work was supported by the International Research Group Program (IRG-14-27), Deanship of Scientific Research, King Saud University, Saudi Arabia.

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Correspondence to Kevin D. Hyde.

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Boonmee, S., D’souza, M.J., Luo, Z. et al. Dictyosporiaceae fam. nov.. Fungal Diversity 80, 457–482 (2016). https://doi.org/10.1007/s13225-016-0363-z

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