Fungalpedia – Note 3046, Pseudomultiseptospora
Pseudomultiseptospora Phookamsak, Rajeshk., Karun. & Wijayaw.
Citation when using this data: Senanayake IC et al. 2023 – Fungalpedia.
Index Fungorum, Faceoffungi, MycoBank, GenBank, Fig 1.
Classification: Incertae sedis, Pleosporales, Pleosporomycetidae, Dothideomycetes, Pezizomycotina, Ascomycota, Fungi.
Etymology: based on the morphological similarity with Multiseptospora.
Saprobic on grass. Sexual morph: Ascomata solitary to gregarious, scattered, immersed, visible as raised, black dots on host surface, uni-loculate, globose to subglobose, glabrous, ostiole, with minute papilla. Peridium inner layers comprise compressed, hyaline, cells of textura prismatica, outer layers comprising brown to dark brown cells of textura angularis. Hamathecium composed of dense, cellular pseudoparaphyses, septate, slightly constricted at the septa, anastomosing among the asci, embedded in a hyaline gelatinous matrix. Asci 8-spored, bitunicate, fissitunicate, broadly cylindric-clavate to clavate, subsessile to short pedicellate, apically rounded, with an indistinct ocular chamber. Ascospores overlapping 3–4-seriate, initially hyaline, becoming brown to dark brown at maturity, fusiform, with slightly rounded ends, slightly curved, septate, not constricted at the septa, smooth-walled, surrounded by thin, mucilaginous sheath, with small appendages at both ends.
Notes: The genus Multiseptospora Phookamsak & K.D. Hyde was introduced in Liu et al. (2015) to accommodate a single species M. thailandica Phookamsak & K.D. Hyde which was collected on Thysanolaena maxima Kuntze. The genus was accommodated in the Pleosporales genera incertae sedis (Liu et al. 2015). However, Tanaka et al. (2015) placed the genus Multiseptospora in Parabambusicolaceae based on its phylogenetic relationships. Li et al. (2016) introduced the second species M. thysanolaenae. Our multi-locus sequence analyses (Fig. 35; Senanayake IC et al. 2023) delineated that M. thysanolaenae distantly related to Multiseptospora sensu stricto. The morphological comparison of M. thysanolaenae with M. thailandica also supported their distant affinity. Therefore, we propose a new genus Pseudomultiseptospora, for M. thysanolaenae as Pseudomultiseptospora thysanolaenae.
Type species: Pseudomultiseptospora thysanolaenae (Phookamsak, Ariyawansa & K.D. Hyde) Phookamsak, Rajeshk., Karun. & Wijayaw.
Other accepted species: Species Fungorum – search Pseudomultiseptospora
Figure 1 – Pseudomultiseptospora thysanolaenae (MFLU 11-0238, holotype). a Appearance of ascomata on host substrate. b Vertical cross-section of ascoma. c Section of peridium. d–f Asci. g–j Ascospores. Scale bars: b = 50 μm, c = 20 μm, d = 5 μm, e–f = 20 μm, g–j = 10 μm.
References
Entry by
Indunil C. Senanayake, Innovative Institute for Plant Health/ Key Laboratory of Green Prevention and Control on Fruits and Vegetables in South China, Ministry of Agriculture and Rural Affairs, Zhongkai University of Agriculture and Engineering, Haizhu District, Guangzhou 510225, Guangdong, China., Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand., Guangdong Provincial Key Laboratory for Plant Epigenetics, College of Life Science and Oceanography, Shenzhen University, 3688, Nanhai Avenue, Nanshan, Shenzhen, Guangdong 518055, China., University of L’Aquila, Department MeSVA, sect. Environmental Sciences, Via Vetoio, 67100 Coppito (AQ), Italy.
Published online 28 August 2026