Opegrapha rouxiana Nav.-Ros. & Hladun
Bull. Soc. linn. Provence, 46: 86, 1995.
Synonyms:
Distribution:
Description: Thallus not apparent, the apothecia developing on the thallus of the host lichens. Apothecia round to irregular in outline, 0.1-0.25 mm across, immersed, black, epruinose, with a slit-like to widely expanded disc and a raised, radially split proper margin. Proper exciple well developed, 20-30 μm thick, dark brown to black-brown, extending below the hymenium, K-; epithecium brownish, 25-30 μm high, and I+ blue; hymenium colourless, 100-130 μm high, I+ red to reddish brown, K/I+ blue; paraphyses densely branched and anastomosing, 2.5-3.5(-4.5) μm thick at mid-level (in K), the apical cells not or only slightly swollen, some of them with a dark cap; subhymenium colourless to brownish, 20-30 μm high, K-. Asci 8-spored, broadly clavate, fissitunicate, with a K/I+ blue ring around the top of the ocular chamber, 65-85 x 19-27 μm. Ascospores 3-septate, long-ellipsoid to subcylindrical, at first hyaline, then turning brown, (21.5-)24.5-30.5 x 8.5-10 μm, the young ones with a c. 2-3 μm thick gelatinous perispore, the overmature ones with a verruculose-granulose wall. Photobiont absent. Spot tests: all negative. Chemistry: without lichen substances.Note: a lichenicolous fungus growing on the thalli of endolithic species of Staurothele, hitherto known only from the mountains of Spain, but probably more widespread. To be looked for in Italy.
Growth form: Lichenicolous fungus
Substrata: rocks
Reproductive strategy: mainly sexual
paras Staurothele spp.
Predictive model
Growth form: Lichenicolous fungus
Substrata: rocks
Reproductive strategy: mainly sexual
paras Staurothele spp.
Predictive model
