Fungalpedia  –Note 2Monoseptella

Monoseptella Wanas., Gafforov & K.D. HydeIndex Fungorum number: IF554162; Facesoffungi number: FoF04003; Fig. 1
Melanommataceae G. Winter (Pleosporales Luttr. ex M.E. Barr) was introduced by Winter (1885) which has 20 genera based on taxonomy and morphological study (Tian et al. 2015). Wanasinghe et al. (2018) reported Monoseptella as a new member of Melanommataceae based on LSU, SSU, ITS and tef sequenced data. Monoseptella is saprobic and can be found growing on dead twigs and stems of rose species. Currently, only one taxon name is listed under Monoseptella in Index Fungorum (2022). The genus is characterized by having a sexual morph with superficial ascomata, that are spherical to subglobose. The peridium consists of 5 to 7 layers of textura globosa/angularis cells that are brown, and reddish brown, with inside cells lighter and darker on the outside. Asci are cylindrical and 8-spored. Ascospores are unicellular, subcylindrical to cylindrical, and slightly curved, the walls are smooth, thin, and hyaline, with the presence or absence of mucilaginous sheath (Wanasinghe et al. 2018). There is no report of asexual morph of Monoseptella (Wanasinghe et al. 2018).

Type species: Monoseptella rosae Wanas., Gafforov & K.D. Hyde

Fig 1. Monoseptella rosae (TASM 6113, holotype) a–c Ascomata on host substrate. d Section of the ascoma. e Peridium. f Asci. g Ascospores. Scale bars: a = 1 mm, b–c = 250 µm, d–e = 100 µm, f–h = 20 µm. i–l = 10 µm. Photo credits: Dhanushka N. Wanasinghe.

Tian Q, Liu JK, Hyde KD, Wanasinghe DN, Boonmee S, Jayasiri SC, Luo ZL, Taylor JE, Phillips AJL, Bhat DJ, Li WJ, Ariyawansa H, Thambugala KM, Jones EBG, Chomnunti P, Bahkali AH, Xu JC, Camporesi E 2015 – Phylogenetic relationships and morphological reappraisal of Melanommataceae (Pleosporales). Fungal Divers 74, 267–324.

Wanasinghe DN, Phukhamsakda C, Hyde KD, Jeewon R, Lee HB, Gareth Jones EB, Tibpromma S, Tennakoon DS, Dissanayake AJ, Jayasiri SC, Gafforov Y. 2018 – Fungal diversity notes 709–839: taxonomic and phylogenetic contributions to fungal taxa with an emphasis on fungi on Rosaceae. Fungal diversity 89(1),1–236.

Winter G 1885 – Rabenhorst’s Kryptogamen-Flora. Pilze – Ascomyceten 1,193–528.,193%E2%80%93528.&ots=6UdljwqYsG&sig=KT_6c8aIOsvxlcIVHDu_oShw3F8

Entry by
Monthien Phonemany, Center of Excellence in Fungal Research, Mae Fah Luang University, 333 Moo 1 Thasud, Mueang, Chiang Rai, Thailand.

(Edited by Chitrabhanu S. Bhunjun and Kevin D. Hyde)

Published online 18 May 2023