Fungalpedia – Note 2665, Nimisiostella
Nimisiostella Calat., Barreno & O.E. Erikss.
Citation when using this data: Meng QF et al. – Fungalpedia.
Index Fungorum, Faceoffungi, MycoBank, GenBank, Fig 1.
Classification: Lecanorales genera incertae sedis, Lecanoromycetidae, Lecanoromycetes, Pezizomycotina, Ascomycota, Fungi
The monotypic genus Nimisiostella was introduced by Calatayud et al. (1997) to accommodate the lichenicolous fungus N. lichenicola, which occurs on Parmelia saxatilis in Spain. The genus is characterized by sessile, rounded, black, apothecioid ascomata. Initially, the ascomata are closed and covered by a brown to dark brown layer that later disintegrates. The lecanoralean asci are clavate, apically thickened, and typically contain 16 to 24 stellate ascospores. The ascospores are simple, hyaline, and turn brownish in older specimens. They have a stellate shape, appearing subspherical or polyhedral, with thin, sharp, radiating projections extending in various directions (Calatayud et al. 1997). The phylogenetic position of Nimisiostella remains uncertain due to the lack of available sequence data.
Type species: Nimisiostella lichenicola Calat., Barreno & O.E. Erikss., on Parmelia saxatilis (Calatayud et al. 1997).
Other accepted species: Species Fungorum – search Nimisiostella.
Figure 1 – Nimisiostella lichenicola redrawn from Calatayud et al. (1997). a Part of section of ascomata. b Paraphyses. c Asci. d Ascospores. Scale bars: a = 5 μm, b, c = 20 μm, d = 10 μm.
References
Entry by
Meng QF, Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai, 57100, Thailand and School of Public Health, Zunyi Medical University, Guizhou 563000, China.
Published online 2 July 2026