Lasiosphaeriopsis salisburyi
Anamorph: not known.
Teleomorph: stromata originating in the algal layer of the host, erumpent through the cortex and superficial from an early stage, carbonaceous, black, uni- or multiloculate, the ascomata mainly 500-700 µm tall and 250-400 µm diam., discrete, aggregated and arising in groups, irregularly obovoid, very coarsely verrucose, broad, short-stalked, ostiolate; the ostiole broad and irregular, lined with periphyses 1.5-2 µm diam. Peridium 75-125 µm thick but very uneven, formed of many layers of angular cells, the cells 10-20 µm diam., dark brown to almost black towards the outside, thick-walled, the inner layers paler and thinner-walled, each cell with one or more pores 1-1.5 µm diam. forming channels between adjacent cells. Interascal tissue absent. Asci arising in a dense fascicle from the base of the perithecial cavity, 100-140 x 14-18 µm, elongate-clavate, the apex obtuse to acute, with a long tapering stalk, thin-walled, not fissitunicate, without any distinct apical structures, not blueing in iodine, 2-to 4-spored. Ascospores irregularly arranged, 28-39 (-41) x 8-11 (-12) µm, irregularly shaped but mostly broadly fusiform or cylindric-fusiform, sometimes with irregular apiculi, 3 (-4)-septate, slightly constricted at the septa, golden brown to olivaceous with paler terminal cells, smooth- and thick-walled, without an epispore or gelatinous sheath.
Not evaluated, but considered to be Nationally Rare.
Parasitic on Peltigera rufescens, erumpent from moribund thalli.
In GBI, reported from single sites in Lancashire, Suffolk, Glamorgan, East and West Lothian and Sutherland.
