Fungalpedia – Note 1081, Halocryptosphaeria
Halocryptosphaeria Dayar., Devadatha, V.V. Sarma & K.D. Hyde
Citation when using this data: Dayarathne MC et al. 2020 (in prep.) – Fungalpedia, Ascomycota.
Index Fungorum, Facesoffungi, MycoBank, GenBank, Fig 1
Classification: Diatrypaceae, Xylariales, Xylariomycetidae, Sordariomycetes, Pezizomycotina, Ascomycota, Fungi
Saprobic on decaying wood of Avicennia marina. Sexual morph: Stromata immersed, blackening the wood surface. Entostroma poorly developed, dorsally limited by a black zone binding the stromatic area. Ascomata spherical to sub spherical, regularly spaced, submerged in the wood, occasionally deeply buried, long necked, raised, and blackening the wood surface. Ostiole poorly developed or conical, not sulcate. Peridium wide, comprising thin white line under the black hymenium, composed of three layers; a subhymenial layer of hyaline hyphae of textura globosaangularis mixed with ascogenous elements, a middle layer comprising guttulate hyaline cells, forming a textura globosa, an outer most layer composed of melanized cells interdispersed with wood elements, wider near the ostiolar canal. Hamathecium lining the whole cavity. Paraphyses numerous, hyaline, aseptate, persistent. Asci clavate, J-, long pedicellate. Ascospores light-brown to olive-brown, aseptate, allantoid, containing oil droplets and limited by a thin epispore, lacking sheath or appendages. Asexual morph: Phomopsis like. Conidiomata immersed, sub-globose to globose, solitary to aggregated, deeply immersed in a stroma with the ascomata of the sexual stage, pale yellow to light brown, occurring on the host. Conidiomatal wall thick, comprising brown, thick-walled textura angularis and pseudoparenchymatous cells merged with the host tissue. Conidiophores lacking septa, straight or curved, hyaline, rarely branched, with one conidiogenous cell. Conidiogenous cells cylindrical, mostly straight, discrete or integrated, arising from pseudoparenchymatous cells, hyaline, unicellular, with wide base producing conidia at the apex. Conidia hyaline, numerous, filiform, straight or curved or hook-like, with blunt ends.
Notes: Halocryptosphaeria is characterized in having poorly developed entostroma, dorsally limited by a black zone binding the stromatic area, submerged or occasionally deeply buried long necked ascomata and olive-brown, aseptate ascospores. The genus Halocryptosphaeria resembles Cryptosphaeria. Morphologically Halocryptosphaeria is distinct from Cryptosphaeria ligniota and Cryptosphaeria pulmanensis in having light-brown ascospores containing oil droplets versus pale yellow ascospores in the latter two, and also by occurring in a marine habitat (Rappaz 1987).
Type species: Halocryptosphaeria bathurstensis (K.D. Hyde & Rappaz) Dayarathne & K.D. Hyde.
Other accepted species: Species Fungorum – search Halocryptosphaeria.
Figure 1 – Halocryptosphaeria bathurstensis (AMH-9952). a Ascomata erumpent, immersed in decaying wood of Avicennia marina. b Horizontal sections of ascoma. c Vertical section of ascoma. d Ostiole. e Peridium. g-l Immature and mature asci. f, m-q Ascospores. Scale bars: c = 100 μm, d = 50 μm, e-q = 5 μm.
References
Entry by
Monika Dayarathne, 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, World Agro forestry Centre East and Central Asia Office, 132 Lanhei Road, Kunming 650201, China, Key Laboratory for Plant Biodiversity and Biogeography of East Asia (KLPB), Kunming Institute of Botany, Chinese Academy of Science, Kunming 650201, Yunnan, China
Published online 13 January 2020