Source: Vondrák J., Svoboda S., Malíček J., Šoun J., Košnar J., Svensson M., Timdal E., Machač J. & Palice Z. (2024) Combining environmental DNA data and taxonomic surveys provides an unprecedented understanding of lichen diversity and accelerates the discovery of new species. – Preslia 96: 351–417, https://doi.org/10.23855/preslia.2024.351 – CC BY 4.0
Allarthothelium endochlorum (holotype). A, habitat and place of finding on the sycamore (arrowhead);
B, thallus and apothecia (arrowheads) covered by whitish epidermis layer of the sycamore bark; C, vertical sec-
tion of apothecium with spherical asci, colourless hymenium/subhymenium and green epithecium, colony of
photobiont cells on the left side (arrowhead); D, ascus with eight older, slightly melanized ascospores, gelatinous
sheath visible on the released ascospore (arrowhead); E, ascospores with enormously thick gelatinous sheaths
(arrowheads); F, hamathecium with flexuose paraphyses; G, strongly muriform ascospore; H, ascospore with
I+ orange gelatinous sheath; I, ascospore with gelatinous sheath swollen in KOH. C, D, observed in water;
E–G, stained by cotton blue; H, after treatment with Lugol’s solution; I, in KOH. Bars: B, 1 mm; C, 100 μm;
D–H, 10 μm
