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 Add this item to the list  804601 Original description
Page number:995 
Description type:Original description 
Description:Chaenothecopsis hunanensis Rikkinen & Tuovila, sp. nov. Figs. 8-9
MycoBank MB804601
Typus: Rikkinen 990059 (holotype, H).
Apothecia on resin or resin impregnated wood and bark of Pinus massoniana Lamb., 700-1200 µm high. Stipe slender, shining black, 30-50 µm wide. Capitulum matte black, later dark brownish, obconical to conical or obovoid to hemispheric, 150-300 µm wide; also often irregularly shaped and/or strongly flattened, agglomerated, almost heart-shaped or stretched and then as narrow as stipe. New apothecia can proliferate from old capitula, even repetitiously. Asci cylindrical, 55-74(-85) µm x (3-)3.5-4(-4.5) µm (n = 20), apex variously thickened, often penetrated by a short canal, mature asci usually without a thickening; formed with distinct croziers. Ascospores uniseriate, usually periclinally, sometimes obliquely arranged in asci, green to yellowish green-brown, septate, septa thinner (and less visible) than spore wall, slightly thickened at the septal junction, cylindrical, smooth to finely pointed, (7-)7.3-10.3(-11.1) x (2-)2.5-3.8(-4) µm, mean 8.7 x 3.2 µm (n = 110, from 14 ascocarps, six populations); Q = (1.9-)2.1-3.6(-4.5), mean Q = 2.8. Paraphyses filiform, unbranched proportion of paraphyses 50-75 µm x 1-1.5 µm, septate, septal intervals 11-13 µm, shorter or as long as asci, occasionally branching once or twice, or longer than asci, and then branching at ascus apex or above, intertwining to form a loose net above the asci, covered with small colorless, strongly congophilous crystals. Stipe hyphae dark green to brownish, 4-5 µm wide, walls 1.5 µm, strongly pigmented, the green pigment often unevenly agglomerated on walls as small lumps or plates, periclinally arranged (textura prismatica); hyphae in inner part of the stipe hyaline or light green, more thin-walled, intertwined. Excipulum hyphae light yellowish green, textura prismatica, pigmented as in the stipe. Epithecium light green, formed as a loose net of the excipular hyphae, partly of branching and intertwining paraphyses, hyaline to light green, congophilous pigment covers cells in epithecium. Hypothecium hyaline to light green. Hymenium and hypotechium IKI- or often with fast and faint blue reaction (see Tuovila et al. 2013). All green or greenish parts of apothecium turn brown in KOH, brown leaks into the medium, sometimes faint reddish reaction in excipulum. All parts N-, MLZ-. A brown hyphomycetous fungus was often found growing among the ascocarps, and rarely on top of the old ascocarps. Specimens examined: China. Hunan province. Dayong County. Zhangjiajie National Forest Park. Fuqiyan, along trail to view point above Zhangjiajie Hotel. Young Cunninghamia-angiosperm forest with large remnant pines, 29°19′N, 110°25′E, 650 m. In basal crevice of large Pinus massoniana, 15 Sep 1999. Rikkinen 990059 (holotype H), 990055 (paratype UPS), 990058 (paratype SKLM). Matianya, young plantation forest with Cunninghamia lanceolata, Pinus massoniana mixed with naturally regenerated broadleaf trees and bamboo stands, 29°19.05′N, 110°27.47′E, ca. 900 m. Resinicolous on basal trunks of mature Pinus massoniana, 16 Sep 1999, Rikkinen 990139, 990164-990167 (paratypes H). Xiejiayu. Naturally regenerated evergreen forest with grassy openings on steep slope of narrow stream valley. 29°18′N, 110°25′E, ca. 750 m. Resinicolous on basal trunk of large Pinus massoniana, 19 Sep 1999, Rikkinen 990413 (paratype H).
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