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Bactrospora brodoi Egea & Torrente
Family: Roccellaceae
Bactrospora brodoi image
Thallus: crustose, thin, mostly immersed, continuous, slightly cracked or granular, effuse surface: white, anatomy: up to 50 µm thick, ecorticate, without a differentiated medulla, I+ pale red or blue, K/I deep blue Ascomata: black, scattered, +round or +irregular in outline, sessile, with a constricted base, 0.3-0.7 mm in diam., immarginate disc: black, plane or convex, often with uneven surface, epruinose exciple: dark brown or reddish brown, thin, open below the subhymenium or in some sections reduced to a narrow band, up to 25-30 µm above and 25-40(-70) basally, I+, K/I+ deep blue pseudoepithecium: dark brown, reticulate hymenium: hyaline, 80-125 µm tall, I+, K/I+ pale blue turning somewhat red; paraphysoids: with apical cells not or slightly thickened, branched and interwoven subhymenium: pale to dark brown, 125-250(-300) µm thick, I+, K/I+ deep blue asci: narrowly clavate to sub-cylindrical, 70-90 x 14-16 µm ascospores: hyaline, transversely (10-)14-24-septate, narrowed at one end, Patellarioides-type, with short cells, (44-)55-75 x (3-)3.5-4 µm Pycnidia: immersed in the thallus, punctiform, globose or subglobose, 90-100 µm tall and c. 90 µm wide, with an apically brown wall, at the base hyaline or pale brown conidia: straight or curved, 7-11 x 1 µm Spot tests: all negative Secondary metabolites: none detected. Substrate and ecology: on bark World distribution: North America (eastern Canada and California) Sonoran distribution: southern California. Notes: Bactrospora brodoi is similar to B. patellarioides but the spores are 55-75 µm long (vs. 60-95), narrower at one end with more septa (14-24 vs. up to 17) and with shorter cells, the exciple is thinner (25-40 vs. 50-160 µm), and the conidia are somewhat smaller (7-11 vs. 8-13 µm).