Brooksia
Brooksia Hansf., Proc. Linn. Soc. N.S.W. 81(1): 32 (1956).
Index Fungorum number: IF 657; Facesoffungi number: FoF 12140, 1 morphological species (Species Fungorum 2022), no molecular data available.
Mycelium partly superficial, partly immersed, comprising a light brown to honey-yellow gelatinous substance, septate, irregularly branched, thick-walled, with hyphae. Sexual morph: Thyriothecia brown to black, on the upper surface of leaf, solitary or gregarious, superficial, carbonaceous, basal layer poorly-developed, rupturing into an irregular mass of cells, ostiolate. Upper wall comprising an irregular, radially arranged of compact hyphae. Peridium composed of an outer textura intricata to textura epidermoidea with compact, brown to black cells, and an inner textura epidermoidea with loose, light brown cells. Hamathecium composed of asci embedded in mucilage inclined towards the center; pseudoparaphyses not observed. Asci 8-spored, bitunicate, fissitunicate, broadly rounded above, narrow below, oblong to elliptical, with an ocular chamber, short pedicellate, hyaline to brown. Ascospores multi-seriate, crowded, irregularly arranged in asci, hyaline when young, brown at maturity, elongate-oblong, muriform, with up to 6 transverse and 4–5 longitudinal to oblique septa, constricted at all septa, smooth-walled, rounded at both ends, slight curved. Asexual morph: Unknown (adapted from Hyde et al. 2017).
Type species: Brooksia tropicalis Hansf.
Notes: Brooksia is characterised by brown to black thyriothecia, bitunicate, fissitunicate asci, and multi-seriate, crowded ascospores. Brooksia lacks sequence data. Hyde et al. (2017) examined the holotype of B. tropicalis (IMI 60644a) and transferred Brooksia to Micropeltidaceae based on morphology. Brooksia resembles Micropeltis in having circular, gregarious, superficial, membranous thyriothecia, and hyaline to brown, septate ascospores but differs in the form of the asci. Brooksia is currently in Micropeltidaceae but molecular data is needed to confirm this taxonomic placement. Micropeltidaceae belongs to Ostropales (Lecanoromycetes) (Hyde et al. 2017).
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