Umbilicaria aprina Nyl.

• Main Author: Davydov, Evgeny A.
• Format: Other/Unknown Material
• Language: unknown
• Published: 2022
• Subjects: Biodiversity; Taxonomy; Fungi; Ascomycota; Lecanoromycetes; Umbilicariales; Umbilicariaceae; Umbilicaria; Umbilicaria aprina; Arctic; Antarctic; The Antarctic; Kola Peninsula; Murmansk; Kamchatka Peninsula; Davydov; Liva; Antarc*; Kamchatka; kola peninsula
• Online Access: https://zenodo.org/record/6302393; https://doi.org/10.5281/zenodo.6302393

Umbilicaria aprina Nyl. (Nylander 1869: 12) Mycobank no. 408077 Type:— ETHIOPIA (=Abyssinia). Dedschen Mts, elev. 14200 ft. W. Schimper (holotype H– NYL 31742!). Gyrophora canescens Dombr. (Dombrovskaya: 1970a: 131), syn. nov. Type:— RUSSIA. [Murmansk Region]: Peninsula Kolaёnsis, montes Chibinensis, ad declivitatem australem montis Vudjavrczorr, elev. 380 m, in schistosis ad lapides nudis, No 6, 5 June 1965, A. V. Dombrovskaya (holotype LE-L266!, Fig. 3) Umbilicaria canescens (Dombr.) Dombr. (Dombrovskaya: 1970b: 131), comb. inval., ICN Art. 41.1 (Turland et al. 2018). Umbilicaria canescens (Dombr.) N. S. Golubk. (Golubkova & Savicz 1978: 115). Thalloconidia produced on most of lower surface of the holotype specimen of Gyrophora canescens, spherical to ellipsoid, brown to dark brown, mainly unicellular, rarely 2-cellular (Fig. 4). The sizes were (7.3–)7.9–8.7–9.6(–9.9) × (6.2–)7.0–7.6–8.2(–8.7) μm for 1-celled (n=25), and (10.6–)10.6–11.2–11.8(–12.3) × (7.2–)7.8–8.4–9.0(–9.0) μm for 2-celled (n=10). The wall was 1.2–1.8 μm. The size and septation of thalloconidia correspond to those known for U. aprina (Hestmark 1990). The morphology of the holotype (Fig. 3) and paratype specimens of Gyrophora canescens also agree with the circumscription of U. aprina except for the dark grey colour of the upper surface. However, this is not a reliable distinguishing character because it may reflect ecological variances and varies even among specimens of the same population. Thus, it is proposed to reduce U. canescens (Dombr.) Golubk. into synonymy with U. aprina. Aside from the locus classicus in the Kola Peninsula Umbilicaria canescens was reported for the Kamchatka Peninsula (Dombrovskaya 1970a), and Mongolia (Byazrov 1986). All the specimens cited by Dombrovskaya (1970a) and Byazrov (1986) were examined and refer to U. aprina. Umbilicaria aprina Nyl. is distributed in the high Arctic, the Antarctic and high mountain habitats worldwide (Davydov et al. 2011, 2019b, Hestmark 2015, 2016). References to U. aprina in the ...