Fungalpedia – Note 823, Fracchiaea
Fracchiaea Sacc.
Citation when using this data: Huang SK et al. 2021 (in prep.) – Fungalpedia, Ascomycota.
Index Fungorum, Facesoffungi, MycoBank, GenBank, Fig. 1
Classification: Nitschkiaceae, Coronophorales, Hypocreomycetidae, Sordariomycetes, Pezizomycotina, Ascomycota, Fungi
Saprobic on wood. Sexual morph: Ascomata scattered to gregarious, immersed to erumpent through the bark of substrate or superficial, carbonaceous to coriaceous, black, turbinate, globose to subglobose, with brown to black, spinous setae, lacking ostioles, sometimes with a small papillate ostiole-like structure without an external opening, with Quellkörper incipient. Peridium composed of brown to hyaline cells of textura angularis to textura prismatica, Munk pores present. Paraphyses absent. Asci polysporous, unitunicate, clavate to cylindrical, pedicellate or sessile, apex rounded, apical ring inconspicuous, evanescent. Ascospores arranged obliquely in the ascus in several longitudinal rows, hyaline to yellowish, allantoid, ellipsoidal to cylindrical, slightly curved, 0–1-septate, smooth-walled, mostly with guttules. Asexual morph: Undetermined (adapted from Fitzpatrick 1924, Subramanian & Sekar 1990).
Notes – Fracchiaea is typified by F. heterogenea and was clarified as a genus in Nitschkiaceae based on ascomata with Quellkörper (Fitzpatrick 1924, Subramanian & Sekar 1990). Subsequently, F. broomeana and F. lunata were sequenced and these strains nested in Nitschkiaceae (Huhndorf et al. 2004b, Mugambi & Huhndorf 2010). In this study, Fracchiaea is basal to the clade of Acanthonitschkea and Nitschkia (96%ML/1.00BY). Coronophora myricoides is transferred as F. myricoides based on morphology and phylogenetic result (see notes for F. myricoides).
Type species: Fracchiaea heterogenea Sacc., Atti Soc. Veneto-Trent. Sci. Nat. 2(1): 163 (1873).
Other accepted species: Species Fungorum – search Fracchiaea.
Figure 1 – Fracchiaea heterogenea: (UPS-UPS:BOT:F-736393, isotype). a Material label. b Material. c Gregarious ascomata. d Ascoma erumpent through the bark of host. e Ascoma cross section. f Septate hyphae. g Munk pores (arrow). h Peridium. i Spine on ascoma. j–l Asci. m Ascospores. Scale bars: c–d = 500 µm, e = 200 µm, h = 100 µm, f, j–l = 50 µm, i = 20 µm, g, m = 10 µm.
References
Fitzpatrick HM. 1924 – The genus Fracchiaea. Mycologia 16(3), 101–114.
Subramanian CV, Sekar G. 1990 – Coronophorales from India-a monograph. Kavaka 18, 19–90.
Entry by
Shi-Ke Huang, State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang 550025, China, The Engineering Research Center of Southwest Bio-Pharmaceutical Resources, Ministry of Education, Guizhou University, Guiyang 550025, Guizhou Province, China, 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, The Mushroom Research Centre, Guizhou University, Guiyang 550025, China
Published online 14 September 2021