Fungalpedia – Note 708, Ceramothyrium
Ceramothyrium Bat. & H. Maia.
Citation when using this data: D. S. Marasinghe et al. 2023 (in prep.) – Fungalpedia, Ascomycota.
Index Fungorum, Facesoffungi, MycoBank, GenBank., Fig 1
Classification: Chaetothyriaceae, Chaetothyriales, Chaetothyriomycetidae, Eurotiomycetes, Pezizomycotina, Ascomycota, Fungi
Epiphytic on leaves covering dark mycelium. Mycelial pellicle elongated, subiculum-like, pale brown to hyaline, septate, closely reticulate, slightly constricted at septa. Sexual morph: Ascomata superficial, solitary or scattered, brown, ostiolate, coriaceous, globose, covered by a mycelial pellicle. Ostiole central, minutely papillate. Peridium brown, with compressed, hyaline, inner cells of textura prismatica and brown outer cells of textura angularis. Hamathecium of cellular or filamentous, hyaline, septate, paraphyses. Asci 8-spored, bitunicate, fasciculate, clavate to pyriform or obovoid, sessile or short pedicellate. Ascospores hyaline, oblong to ellipsoid, inequilateral, muriform or with transversal and longitudinal septa, constricted at the septum, tapering at both ends, with or lack of a mucilaginous sheath, smooth-walled. Asexual morph: Mycelium dark to brown. Conidiophores absent. Conidiogenous cells intercalary in hyphae. Conidia holoblastic, pigmented, tri-radiate, sausage-shaped, multi-septate, constricted at the septa, consisting of a main axis and two arms (Yen et al. 2018).
Notes: Batista and Maia (1956) introduced Ceramothyrium to accommodate species with a mycelial pellicle off umagineous mycelium devoid of setae. Species of Ceramothyrium are characterized by a mycelial pellicle that covers the ascomata with a circumferential space around the maturing ascomata (Batista and Maia 1956; Chomnunti et al. 2012a). This genus was formally placed in Phaeosaccardinulaceae and later transferred to Chaetothyriaceae. Ceramothyrium is morphologically similar to Phaeosaccardinula in having muriform, globose to subglobose, hyaline ascospores, with or without an ostiole, lacking ascomatal setae however, Phaeosaccardinula has globose ascomata, growing on a sooty-like surface and cupulate when dry. Ceramothyrium has some-what flattened, papillate ascomata with a thick elongated mycelial pellicle. Species of this genus are usually saprobic and considered as similar to sooty molds. Winka et al. (1998) provided the first sequence data (SSU) for Ceramothyrium linnaeae in this genus and confirmed the placement in Chaetothyriales. According to the phylogenetic analysis, Ceramothyrium is polyphyletic nature. The recommended loci for distinguishing species in this genus are LSU, ITS and SSU.
Type species: Ceramothyrium paiveae Bat. & H. Maia [as‘Ceramothyrium paivaeae’], (1956)
Other accepted species: Species Fungorum – search Ceramothyrium.
Figure 1 – Ceramothyrium sp. (Material examined: Thailand, Chiang Mai (MRC), on unidentified dead leaf, 24 April 2019, DMRC3b, molecular data is not available). a, b Ascomata on the host. c Upper view of ascomata. d Cross section of ascoma. e Peridium. f–g Asci. h–l Ascospores. Scale bars: c = 100 µm, d–g = 20 µm, h–l = 10 µm
References
Batista AC, Maia H 1956 – New and unusual species of Balansiopsis. Atti dell’istituto Botanico della Università e Laboratorio Crittogamico di Pavia 14:1–10.
Entry by
Diana Sandamali Marasinghe, Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai, 57100, Thailand School of Science, Mae Fah Luang University, Chiang Rai, 57100, Thailand, Mushroom Research Foundation, 128 M.3 Ban Pa Deng T. Pa Pae, A. Mae Taeng, Chiang Mai, 50150, Thailand
Published online 29 August 2023