Fungalpedia – Note 433, Neotrimmatostroma

 

Neotrimmatostroma Quaedvl. & Crous

Citation when using this data: Tibpromma et al. 2024 (in prep.) – Fungalpedia, Ascomata.

Index Fungorum, Facesoffungi; MycoBank, GenBank, Fig. 1 

Classification: Teratosphaeriaceae, Mycosphaerellales, Dothideomycetidae, Dothideomycetes, Pezizomycotina, Ascomycota, Fungi.

Neotrimmatostroma is a new genus introduced by Quaedvlieg et al. (2014) to accommodate Neotrimmatostroma bifarium, N. excentricum, and N. excentricum (type species), based on phylogenetic analyses of combined ITS, LSU, TEF-1α, RPB2, ACT, Btub, and CAL. Neotrimmatostroma has both sexual and asexual morphs and can be found as foliicolous or plant pathogenic (Quaedvlieg et al. 2014). The sexual morph is characterized by fasciculate, bitunicate, paraphysate, 8-spored, obovoid to broadly ellipsoidal asci and tri- to multiseriate, fusoid-ellipsoidal with obtuse ends, smooth, 3-septate, thick-walled, guttulate, with persistent mucous sheath ascospores, and the asexual morph is characterized by branched at base, smooth, loosely aggregated conidiophores, terminal, cylindrical to doliiform, holothallic conidiogenous cells and basipetal chains, smooth, 4-celled, consisting of two basal cells with truncate lateral sides, each giving rise to a secondary globose apical cell, thick-walled between the primary and secondary cells conidia (Quaedvlieg et al. 2014, Crous et al. 2019). Neotrimmatostroma has four accepted species viz: N. bifarium, N. dalrympleanae, N. excentricum and N. paraexcentricum.

Type species: Neotrimmatostroma excentricum (B. Sutton & Ganap.) Quaedvl. & Crous

Other accepted species: Species Fungorum – search Neotrimmatostroma

 

 

Figure 1 –Morphology of Neotrimmatostroma excentricum. a. Asci. b. Ascospores. c. Conidia. Scale bars: a-c = 10 μm. Redrawn from Crous et al. (2019).

 

References

Crous PW, Wingfield MJ, Cheewangkoon R, Carnegie AJ et al. 2019 – Foliar pathogens of eucalypts. Studies in Mycology 94, 125–298.

Quaedvlieg W, Binder M, Groenewald JZ, Summerell BA et al. 2014 – Introducing the consolidated species concept to resolve species in the Teratosphaeriaceae. Persoonia-Molecular Phylogeny and Evolution of Fungi 33(1), 1–40.

 

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 2 December 2024

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