Calonema gansuence B. Zhang & Yu Li, 2015

Zhang, Bo & Li, Yu, 2015, A new record of the genus Calonema, with the new species Calonema gansuence from China, Phytotaxa 212 (2), pp. 169-172 : 170

Calonema gansuence B. Zhang & Yu Li , sp. nov. Figs. 1–2

MycoBank: MB 803965

This new species differs from other similar species by the relatively thick peridium of the sporocarps and spores marked with rows of warts.

Type: — China, Gansu Province, on the bark surface of a dead log, 8 August 2012, Zhang Bo 2012112202, Zhang Bo 2012112502 (Holotype, HMJAU 10360).

Etymology: — gansuence (Latin) , referring to the fact that the new species was collected from the Gansu Province.

Distribution: — China, Gansu Provinc, Qilan mountain. Zhang Bo 2012112202, 36– 37º S, 96º W, 3865 m; Zhang Bo 2012112502, 38º S, 101º W, 3654 m.

Description: —Sporocarps sporangiate or forming small plasmodiocarps. Sporocarps scattered, sessile, globose to subglobose or pulvinate, 0.3–0.5 mm in diam., 0.3–0.5 × 0.2–0.8 mm, occasionally slightly elongated. Plasmodiocarps simple. Sporotheca brick gray brown to reddish brown, fading to yellowish brown when old ( Fig 1 –1,2). Hypothallus inconspicuous, membranous, colorless to dark reddish brown, yellowish red by transmitted light. Stipe absent. Peridium thick, persistent, single, partly evanescent, filled with abundant deposits of granular material, dark brick to purplish chestnut, yellowish brown by transmitted light, the inner surface ornamented with plicate wrinkles, dehiscence apical and irregular ( Fig 1–6, 7 ). Columella absent. Capillitium consisting of tubular threads, elastic, slightly or not expanded, pale yellow to yellow by transmitted light, threads 3–4 μm diam., with irregular swelling, 5–9 μm in diam., straight or slightly flexuous, branched and anastomosed, with few free ends, decorated with faint irregular spirals or half rings or reticulate ( Fig 1–3, 4, 5 ). Spores free, dark brown, yellowish brown in mass, yellow pale to colorless by transmitted light, globose to subglobose, 9–12 μm in diam., densely warted ( Fig 1–8 ). Plasmodium not observed.

Figures

FIGURES 1–8: Calonema gansuence (HMJAU10360, Holotype) 1–2. Sporocarps. 3–5. Capillitium with faint irregular spirals or half rings or reticulate markings. 6. Inner surface of the peridium, ornamented with wrinkles. 7. Capillitia and spores by transmitted light. 8. Spores densely covered with warts. (Scale bars: 1 = 0.2 mm, 2 = 1 mm).