Fungalpedia – Note 735, Asteridiella
Asteridiella. McAlpine, Proc. Linn. Soc.
Citation when using this data: D. S. Marasinghe et al. 2023 (in prep.) – Fungalpedia, Ascomycota.
Index Fungorum, Facesoffungi, MycoBank, GenBank., Figs 1,2,3
Classification: Meliolaceae, Meliolales, Meliolomycetidae, Sordariomycetes, Pezizomycotina, Ascomycota, Fungi
Epiphytic on leaves and stems. Superficial hyphae branched, septate, darker at the septa, brown, with hyphopodia, hyphal setae lacking. Hyphopodia capitate, alternate or opposite on hyphae, near to hyphal septa, 2-celled, brown. Sexual morph: Ascomata superficial, mostly gregarious, rarely solitary, sub globose to globose, thick-walled, with specialized conoid to larviform appendages and a central ostiole. Peridium comprises hyaline inner cell and dark brown outer wall with the cells of textura angularis. Hamathecium with evanescent paraphyses. Asci 2–4-spored, unitunicate, oblong to cylindrical. Ascospores 2–4-seriate, hyaline to brown, subcylindrical to oblong, 4-septate, slightly constricted and darker at the septa, not constricted in some species, smooth-walled. Asexual morph: Phialides rarely observed on hyphae, ampulliform, alternate or opposite, sometimes curved, pale brown to brown. Conidia hyaline (Hansford 1961; Hosagoudar 2013).
Notes: McAlpine (1897) introduced Asteridiella with the type species Asteridiella solani and it is characterized in having ascomatal wall with warty spines. However, some authors assume that the larviform appendages in Appendiculella and homologues with the cowarty spines of Asteridiella (Rodríguez Justavino et al. 2015). Appendiculella lozanellae has both characters of larviform appendages and conoid cells on the ascomatal wall (Rodríguez Justavino and Piepenbring 2007). Hongsanan et al. (2015a) suggested that conoid cells may extend to form larviform appendages based on her observation of the type species of both genera. Zeng et al. (2020) also observed that these two genera are phylogenetically not distinct and synonymized Appendicullela under Asteridiella giving priority to the older name Asteridiella. We follow Zeng et al. (2020) and accept Appendiculella as a synonym of Asteridiella.
Type species: Asteridiella solani McAlpine, Proc. Linn. Soc. N.S.W. 22(1): 38 (1897)
Other accepted species: Species Fungorum – search Asteridiella.
Figures 1 – Asteridiella anas- tomosans. a Hypophodiate mycelium. b Phialides. c Ascospores. d Perithecial cells. Scale bars: a = 7 μm, c = 11 μm. Redrawn from Hosagoudar and Riju (2013)
Figures 2 – Asteridiella solani (BPI 697764). a, b Herbarium packet. b Herbarium leaf specimen. c Ascomata on host surface. d Sec- tion through ascomata. e, f Raised conical projections on ascomata. g Hyphae with capitate hyphopodia. h Hyphae with phialides. i, j Immature asci. k Mature asci. l Mature ascospore. Scale bars: d = 100 μm, f = 50 μm, e, i–k = 20 μm, g, h, l = 10 μm
Figures 3 – Endomeliola dingleyae (isotype). a, b Herbarium packet and specimen. c, d Ascostromata on leaf surface. e Section through ascostromata. f Periphyses. g Peridium between locules. h Intercel- lular hyphae. i Paraphyses. j, k Asci. l Immature ascospore. m Mature ascospore. Scale bars: e = 50 μm, f, h, j, k = 20 μm, g, l, m = 10 μm
References
Hansford CG 1961 – The Meliolaceae a monograph. Sydowia Beih 2:1–806.
Hongsanan S, Tian Q, Peršoh D, Zeng XY et al 2015a – Meliolales. Fungal Divers 74(1):91–141.
Hosagoudar VB 2013 – Meliolales of India. J Threatened Taxa 5:3701–3788 3:3993–4068.
McAlpine D 1897 – New South Wales fungi. Proc Linnean Soc NSW 22:38.
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