Neotherrya pinicola Lan Zhuo & C. L. Hou 2025, sp. nov.
Year: 2025
Type: other
Abstract: Neotherrya pinicola Lan Zhuo & C. L. Hou sp. nov. Figs 26, 27 Etymology. Referring to the host genus Pinus. Diagnosis. This new species is distinguished from other Neotherrya species by its aseptate, cylindrical ascospores. Type. CHINA, Yunnan Province, Lijiang, Shangri-la, Bilahai, alt. ca. 3540 m, on twigs of Pinus densata Mast. (Pinaceae), 27 Jun. 2011, C. L. Hou, HOU 919 (BJTC 2011077, holotype). Sexual morph. Ascomata on twigs, erumpent from bark, scattered, not associated with pale areas. In surface view, ascomata round to irregular, 480–900 µm, dark gray (# 373737) to dark brown (# 2 b 180 b), opening by irregular splits to expose a black (# 000000) hymenium. Lips absent. In median vertical section, covering stroma 40–60 μm thick near the center of ascomata, extending to the basal Covering stroma, consisting of the outer remains of the epidermis with the cuticle, an inner layer of carbonized, thick-walled, angular to globose cells, and an innermost layer of hyaline, angular cells. Excipulum well-developed, formed by marginal paraphyses. Basal Covering stroma 8–10 μm thick, consisting of dark brown hyphae and carbonized, thick-walled angular cells. Internal matrix of Covering stroma well-developed, consisting of hyaline, short hyphae. Subhymenium 10–15 µm thick, consisting of textura intricata. Paraphyses aseptate, filiform, not branched, swollen to 3–7 µm at their tips, agglutinated to form a dark epithecium, 120–165 × 2–2.5 µm, covered by a thin gelatinous sheath. Asci ripening sequentially, clavate, apex obtuse-rounded, 100–150 × 8–11 µm, thin-walled, J –, 8 - spored. Ascospores aseptate, cylindrical to fusiform, tapering at both ends, 65–100 × 2–3 μm, hyaline, pluriguttulate, without gelatinous sheaths. Asexual morph. Conidiomata and zone lines not seen. Distribution. Known only from Yunnan Province, China. Notes. In the phylogenetic tree, Neotherrya pinicola is closely related to four species, N. abieticola, N. catilliformis, N. circinata, and N. nematoidea. These five species form a clade with high support values (MLB = 100 %, MPB = 100 %, PP = 1.00). Morphologically, N. pinicola has sessile ascomata with a well-developed excipulum like the other four species. Based on the phylogenetic analysis and morphological characteristics, N. pinicola should be placed in the genus Neotherrya. Neotherrya pinicola differs from the other four species by the cylindrical to fusiform, aseptate ascospores. Therefore, N. pinicola is proposed as a distinct species.
Authors: Zhuo, Lan, Wang, Hai-Qi, Zhang, Peng, Sui, Xiao-Nan, Guo, Mei-Jun, Wang, Shi-Juan, Hou, Cheng-Lin
Institutions: Capital Normal University, Anhui Agricultural University
Language: English
Subfield: Cell Biology
Domain: Life Sciences
Open Access status: green
OpenAlex ID: W6893306035
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