Neospadicoides lignicola Z.L. Luo, K.D. Hyde & H.Y. Su
Index Fungorum number: IF 555653, Facesoffungi number: FoF 05427, Fig. 22
Etymology: Referring to this fungus dwelling on wood.
Holotype: MFLU 18–1606
Saprobic on decaying wood submerged in freshwater habitats. Sexual morph: Undetermined. Asexual morph: Colonies effuse, brown to dark brown. Mycelium partly superficial, partly immersed, composed of septate, branched, smooth, pale brown hyphae. Conidiophores (70–)134–276(–303) µm long, 5–7 µm wide (x̄ = 205 ´ 6 µm, n = 20), macronematous, mononematous, solitary or in groups, erect, unbranched, septate, straight or flexuous, cylindrical, brown, paler towards the apex, smooth. Conidiogenous cells holoblastic, discrete, terminal and intercalary, subhyaline to pale brown. Conidia 20–24 µm long, 9–13 µm wide (x̄ = 22 ´ 11 µm, n = 20), acrogenous or acropleurogenous, pale brown to brown, obovoid, rounded at the apex, truncate at the base, almost 2–3-septate, with dark band at septa, guttulate, smooth-walled.
Material examined: CHINA, Yunnan Province, Gaoligong Mountain, saprobic on decaying wood submerged in a freshwater stream, July 2015, X.J. Su, S-735 (MFLU 18–1606, holotype), ex-type living culture MFLUCC 17–2444.
Notes: Neospadicoides lignicola resembles N. yunnanensis in having macronematous, mononematous, solitary or in groups, erect, unbranched, septate, straight or flexuous, cylindrical, brown conidiophores paler towards the apex, integrated, terminal conidiogenous cells and obovoid, septate, guttulate conidia. However, Neospadicoides lignicola differs from N. yunnanensis in having larger conidia (20–24 ´ 9–13 vs. 7.5–10.5 ´ 4–6 µm), and conidiogenous cells of N. yunnanensis are with pale-colored pores at the conidiogenous loci. Phylogenetic analysis of Luo et al. (2019) also shows that N. lignicola and N. yunnanensis are different species. To further support Neospadicoides lignicola as a new species, we compared nucleotide differences with N. yunnanensis following the guidelines of Jeewon and Hyde (2016). Comparison of the 521 nucleotides across the ITS region reveals 40 bp differences (7.67%) including 3 gaps.
Luo ZL, Hyde KD, Liu JK, Maharachchikumbura SSN et al. 2019 – Freshwater Sordariomycetes. Fungal Diversity 99, 451–660.
Jeewon R, Hyde KD (2016) Establishing species boundaries and new taxa: recommendations to solve taxonomic ambiguities. Mycosphere 7:1669–1677.