Amniculicola guttulata Z.L. Luo, K.D. Hyde & H.Y. Su Fungal Diversity 96: 13 (2019)
Index Fungorum number: IF 555507
Saprobic on decaying wood submerged in freshwater
Sexual morph: Ascomata 160–180 μm high, 170–190 μm diam., black, solitary, scattered or occasionally gregarious, superficial, subglobose to conical, with ostiolate papilla. Peridium 35–45 μm thick, comprising several layers of hyaline to pale brown, thin-walled, large cells of textura angularis or irregular cells. Pseudoparaphyses 2.2 μm diam., dense, trabeculate, filiform, persistent, hyaline, embedded in mucilage, anastomosing between and above the asci. Asci 105–141(–256) × 8.5–10.5 μm (x̄ = 158.5 × 10 μm, n = 10), 8-spored, bitunicate, fissitunicate, cylindrical to narrowly fusiform, with a twisted, bifurcate, short pedicel, 7.5–18.5 μm long, apically rounded or slightly obtuse, endoascus elongate to 256 μm long when mature, with a small incon- spicuous apical apparatus barely seen in water. Ascospores 21.5–27 × 5.2–6.2 μm (x̄ = 23.7 × 5.6 μm, n = 15), uni-seriate or overlapping uniseriate, straight or slightly curved, hyaline, 1-septate, obscure when young, visible when germinated, deeply constricted at the septa, slightly constricted at a quarter, the upper cell slightly broader than the lower one, broadly fusiform, with two prominent big guttules in the middle cell and four gradually smaller ones beside, thin walled, smooth, with a thin, hyaline, bipolar narrowed, mucilaginous sheath which is 1–2 μm thick. Asexual morph: Undetermined.
Specimen examined: CHINA (Hyde et al. 2019, Dong et al. 2020)
Fig. Amniculicola guttulata (MFLU 18-1160). a Appearance of black ascomata on host. b Vertical section of ascoma. c Structure of peridium. d Pseudoparaphyses. e–h Bitunicate asci. i–n Ascospores. o