Cribraria gothica Sadykov & Potapov 2023, sp. nov.

Cribraria gothica Sadykov, sp. nov.

MycoBank: MB 847868

Etymology:— as a cultural and architectural style, that excludes bright colours and asymmetric shapes.

Holotype:— The west of republican protected natural area “Russian-German Switzerland ”, on bank of Kazanka river, Kazan, Republic of Tatarstan, Russia, 55.802587°N, 49.157835°E. On sample of dead wood of Salix sp., appeared on 220 th day, substrate collected 11 Oct. 2021 by Ruslan Sadykov (RS900130).

Stalks long, fibrous, about 2.5 mm high, 30–40 µm wide (Fig. 2A). Mostly dark grey, black to middle, creamy or light ochre about 100 µm from the sporocyst (Fig. 2B–D). Sporocysts spherical or ellipsoidal, approximately 300 µm in height, 350 µm in diameter and 1100 µm circumference (Fig. 2B–E). Peridium calycle monotone, glossy, plumbeous coloured, with barely visible parallel stripes, composed by granular material intertwined with the finest threads (Fig. 2I). Edge flat, highlighted with a clear shaded ring, smooth transition to peridial net absent (Fig. 2E, I). Peridium net well developed, checkmate-symmetrical (Fig. 2E). Net nodes thickened, composed of small granular material (to 1 µm for granule), colour is analogical to calycle, as sharp-angled triangles and rhomboids (Fig. 2H), that takes about 30% of net. Net threads thin, barely noticeable (Fig. 2H). Medium ratio of net nodes length to net threads length is 1:0.25. Medium ratio of calycle square to peridium net square is 1:1.35. Medium ratio of sporocyst length to stalk length is 1:8.3. Spores rounded, grey in mass, light grey or colorless in transmitted light (TL), decorated with dense small warts, (4.5–)5–5.3(–5.7) µm in diameter (n = 30) (Fig. 2F, G).

Macrohabitat:— (Fig. 3A), water covered river bank with Salix spp. and Phragmites australis.

Microhabitat:— (Fig. 3B), in mcc, on dead wood of Salix sp.

Distribution:— Samples of C. gothica are known only from Kazan city.

The differences between C. gothica and two similar species are listed in Table 1.