Acarospora oscurensis K. Knudsen, Kocourk. & Kondrysová
CC BY 4.0 - Source: Knudsen K, Kocourková J, Kondrysová E, Pušová T, Hollinger J, Leavitt S, McCarthy J, Jedličková L, Westberg M (2025) Discovering the diversity of Acarosporaceae (Acarosporales, Lecanoromycetes) with carbonized epihymenial accretions in North America. MycoKeys 122: 123-148. https://doi.org/10.3897/mycokeys.122.162675
U.S.A. • New Mexico, Lincoln Co., Tularosa Basin, Oscura, Road 54, 33.4863, -106.0928, alt. 1475 m, SW-NE crest above the valley, southernmost hill, on soft acid sandstone, 14. Mar. 2022, K. Knudsen 19438 & J. Kocourková (SBBG-holotype). Acarospora oscurensis, Hollinger 6327 (A), Knudsen 19438 Holotype (B, H–J), Kocourková 10795.1 (C), Kocourková 10795.3 (D), Kocourková 10846 (E), Kocourková 11512 (F, G, K). A. Habit of the thallus with apothecia emerging from white stromata; B. White stromata with pycnidia; C. Elevated apothecia developing from pycnidia, with thick margin and umbo developing on the disc; D. Maturing elevated apothecia; E, F. White stromata and marginate apothecia developing gyrose surface; G. Fully developed immarginate gyrose apothecia; H. Vertical section through apothecium showing hyaline hymenium and algal layer; I. Septate and anastomosed paraphyses; J. Vertical section through apothecium under dissecting microscope; K. Spores. Scale bars: 1 mm (A, F); 500 µm (B–E, G, J); 100 µm (H); 5 µm (I, K).
