Fungalpedia – Note 2990, Neocirrenalia
Neocirrenalia J. Yang & K.D. Hyde.
Citation when using this data: Jing Yang et al. 2023 – Fungalpedia.
Index Fungorum, Faceoffungi, MycoBank, GenBank, Fig 1.
Classification: Chaetosphaeriaceae, Chaetosphaeriales, Sordariomycetidae, Sordariomycetes, Pezizomycotina, Ascomycota, Dikarya, Fungi.
Saprobic on decaying submerged wood in freshwater habitats. Asexual morph: Colonies effuse, scattered, dark brown, granular, glistening. Conidiophores macronematous, mononematous, erect or arising laterally on hyphae, simple, straight, or flexuous, smooth-walled, septate, unbranched, pale brown to dark brown. Conidiogenous cells monoblastic, integrated, terminal, determinate, subcylindrical, brown. Conidia acrogenous, solitary, regularly helicoid, mostly 1–1.5 times contorted, non-complanate, cells increasing in diameter from base to the terminal, pale brown when young with subglobose to ellipsoidal, paler, and larger terminal cells, dark olivaceous brown to black when mature with opaque septa and contractible terminal cells. Sexual morph: Undetermined.
Notes: Neocirrenalia is introduced as a segregated genus from Cirrenalia to accommodate Cirrenalia nigrospora. Cirrenalia is a heterogeneous genus with several species transferred to phylogenetically distant genera, including Cucurbitinus, Juncigena, Halazoon, Hiogispora, Hydea, and Matsusporium (Abdel-Wahab et al. 2010; Liu et al. 2020). Cirrenalia remains 13 species, some of which are still questionable (Chethana et al. 2021; Index Fungorum 2022). The molecular data is only available for the type species C. macrocephala which belongs to Halosphaeriaceae (Tsui and Berbee 2006; Abdel-Wahab et al. 2010; Hernández-Restrepo et al. 2017; Liu et al. 2020). In comparison, Neocirrenalia is a member of Chaetosphaeriaceae. Conidia of Neocirrenalia nigrospora are black, 1–1.5 times coiled and not constricted at the septa while that in Cirrenalia macrocephala are versicolor, curved to one coiled with strongly constricted septa and a larger and darker terminal cell (Meyers and Moore 1960).
Type species: Neocirrenalia nigrospora (Somrith., Chatmala & E.B.G. Jones) J. Yang & K.D. Hyde.
Other accepted species: Species Fungorum – search Neocirrenalia.
Figure 1 – Neocirrenalia nigrospora (MFLU 22-0069, reference specimen) a, b Colony on woody substrate. c–f, h, i Conidiophores with conidia. g Conidiophore. j, k Conidia. l Germinated conidium. m, n Culture, m from above, n from below. o–u Sporulated conidia on MEA medium. Scale bars: a, o = 100 µm, b, l = 50 µm, c–k, p–u = 30 µm.
References
Entry by
Jing Yang, School of Life Science and Technology, Center for Informational Biology, University of Electronic Science and Technology of China, Chengdu 611731, People’s Republic of China, School of Science, Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand, Guizhou Key Laboratory of Agricultural Biotechnology, Guizhou Academy of Agricultural Sciences, Guiyang 550006, People’s Republic of China.
Published online 20 August 2026