You are here
Taxon Pages
Fissurina astroisidiata Herrera-Campos & Lücking
Nomenclature
-
Family: GraphidaceaeGenus: Fissurina
SUMMARY
Mycobank MB 517771
Thallus corticolous, up to 10 cm diam., 100–150(–300) µm thick, continuous but typically cracked, isidiate; surface uneven to bumpy (large bumps up to 300 µm thick), light greyish green to olive-green; isidia coarse, cylindrical, basally constricted and tapering towards the apex, 1–2 mm long and 0.1–0.15 mm thick, yellowish white but often darkened at the tip. Thallus in section with 10–15 µm thick prosoplectenchymatous upper cortex, irregular algal layer and clusters of calcium oxalate crystals. Lirellae stellately branched, the stellate clusters concentrated on the elevated thallus bumps, erumpent, fissurine, with thick complete thalline margin, 1–3 mm long, 0.2–0.3 mm wide, 0.1–0.15 mm high; disc partly exposed; labia thin but conspicuous, yellowish white; thalline margin light yellowish green to olive-green. Excipulum entire, colourless to orange-brown, 15–25 µm thick; laterally covered by corticate algiferous thallus including clusters of crystals; hypothecium prosoplectenchymatous, 5–10 µm high, colourless to pale yellowish; hymenium 90–100 µm high, colourless, clear; epithecium granulose, 5–10 µm high, grey-brown. Paraphyses unbranched, glabrous; periphysoids not observed; asci fusiform to clavate, 80–90 x 12–15 µm. Ascospores 8 per ascus, ellipsoid, submuriform with 3 transverse and 0–1 longitudinal septa per segment, 12–15 x 6–8 µm (including 1–1.5 µm thick wall), 2 times as long as wide, with angular-rounded septa and lumina, colourless, I–. Secondary chemistry: no substances detected by TLC.