Anamylopsora pruinosa D.L. Liu & X.L. Wei

Zuo, Ya-Bo, Liu, Da-Le, Li, Cui-Xin, Chen, Yu-Hui & Wei, Xin-Li, 2018, A new species of the lichenised genus Anamylopsora (Baeomycetaceae, Baeomycetales) from Tengger Desert of China, MycoKeys 41, pp. 107-118 : 107

Anamylopsora pruinosa D.L. Liu & X.L. Wei sp. nov. Figures 2 a–i

Diagnosis.

The species is characterised by densely pruinose upper surface, abundantly thick and strong rhizines and terricolous habitat.

Type material.

CHINA. Ningxia: Zhongwei City, Ciu Liu Gou. 37°24'34.92"N, 104°35'8.66"E, 1577 m alt., on sandy soil, 15 July 2017, D.L. Liu & R. D. Liu XL2017133 ( HMAS–L–141383– holotype).

Description.

Thallus squamulose, 2-6 cm diam., terricolous, tightly adnate to the substrate. Squamules 2-3 mm diam., more or less imbricate, with areolate crust-like centre and slightly ascending and crenate margin. Upper surface densely pruinose, occasionally naked part khaki, dull to slightly shiny. Lower surface pale brown near the margin, mostly absence of well-developed cortex. Rhizines abundant, ecorticate, simple to branched, 4-6.5 mm long, 0.5-0.8 mm thick. Outer layer of upper cortex pale brown, ca. 50 µm high; inner layer of cortex colourless, 125-150 µm high. Photobiont layer continuous, 50-150 µm high; algal cells green, unicellular. Medulla 112.5-250 µm high, containing pale brown crystals. Lower cortex brownish, 15-17.5 µm high. Apothecia lecideine, marginal, 0.5-2 mm diam., dark brown to black, occasionally cracked, dull, epruinose. Epithecium dark brown, ca. 12.5 µm high. Hymenium colourless, 75-100 µm high, hemi-amyloid; asci clavate, 50-125 × 7.5-12.5 µm, surrounded by an amyloid sheet; tholus more or less well developed, non-amyloid. 4-8 ascospores per asci, i.e. 4, 5, 6, 8; ascospores simple, subglobose, colourless, 7.5-10 µm diam.; paraphyses weakly conglutinated, simple, with slightly thickened and brown pigmented apical cells. Pycnidia marginal, subglobose, dark brown to black, 275-425 × 275-375 µm; conidia shortly bacilliform, colourless, 3.75-5 × 1.25-2.5 µm.

Chemistry.

Alectorialic and barbatolic acids.

Habitat and distribution.

On the surface of sand soil in the arid region of Northwest China, Tengger Desert, where the annual precipitation is under 200 mm.

Etymology.

Name refers the whole upper surface being densely pruinose.

Additional material examined.

CHINA. Ningxia: Zhongwei City, Ciu Liu Gou. 37°24'34.92"N, 104°35'8.66"E, 1577 m alt., on sandy soil, 1 June 2018, D.L. Liu et al. ZW2018064 ( HMAS–L– 141384), ZW2018099 ( HMAS–L– 141386), ZW2018100 ( HMAS–L– 141385), ZW2018101 ( HMAS–L– 141388), ZW2018102 ( HMAS–L– 141387).

Notes.

As known, Anamylopsora pulcherrima is saxicolous, growing on calciferous and non-calciferous rocks; upper surface epruinose or more rarely pruinose with more or less white pruinose margin ( Timdal 1991). While the new species, A. pruinosa , is terricolous, growing directly on the surface of sandy soil, with thick and strong rhizines penetrating into the sand. On the other hand, the upper surface of A. pruinosa is densely white pruinose, occasionally very little part naked. Phylogenetic and species delimitation analyses based on ITS sequences (Fig. 1) also well supported that they are two different species.