Pseudodiatrype hainanensis S. H. Long & Q.R. Li sp. nov.
MycoBank No: 839659
Holotype. GMB0054.
Description. Saprobic on decaying branches of an unidentified plant.
Sexual morph: Stromata wart-like, pustulate, 2–3.6 mm long and 1.6–3 mm broad (av. = 3.2 × 1.9 mm, n = 30), about 2 mm thick, 5–20 in single stroma, visible as black, rounded to irregular in shape on the host surface, erumpent through host bark, solitary to gregarious.
Endostroma composed of an outer layer of dark brown to black, small, tightly packed, thin parenchymatous cells and an inner layer of white, large, loose parenchymal cells with powdery, thin, yellowish tissue. Ostiole opening separately, papillate or apapillate,central.
Perithecium immersed in the stroma, globose to subglobose, glabrous, with cylindrical neck, brevicollous or longicollous, 193–347 μm high, 138– 206 μm diam. (av. = 278 × 156 μm, n = 10). Peridium 30–50 μm thick, dark brown to hyaline with textura angularis cell layers. Asci 110–155.5 × 6–10 μm (av. = 132 × 8 μm, n = 30), 8-spored, unitunicate, clavate, long-stalked, apically rounded with inamyloid rings. Ascospores 8.5–13 × 1.5–2.5 μm (av. = 10.5 × 2 μm, n = 30), irregularly arranged, allantoid, slightly or moderately curved, smooth, subhyaline, aseptate, usually with two oil droplets.
Asexual morph: undetermined.
Habitat: Saprobic on decaying branches of an unidentified plant.
Distribution: China.
Culture characteristics. Ascospores germinating on PDA within 24 hours. Colonies on PDA, white when young, became pale brown, dense, but thinning towards edge, fluffy to slightly fluffy, white from above, pale brown from below, no pigmentation produced on PDA medium, no conidia observed on PDAor on OA media.
GenBank Accession: GMB0054 (LSU: MW797055, RPB2: MW814900); GMB0055 (LSU: MW797056, RPB2 MW814901).
Preference: Long, S., Liu, L., Pi, Y., Wu, Y., Lin, Y., Zhang, X., Long, Q., Kang, Y., Kang, J., Wijayawardene, N. N., Wang, F., Shen, X., & Li, Q. (2021). New contributions to Diatrypaceae from karst areas in China. MycoKeys, 83, 1–37. https://doi.org/10.3897/mycokeys.83.68926
Pseudodiatrype hainanensis (GMB0054, holotype) A stromata on host substrate B, C stromata on host D transverse section through ascostroma E vertical section through ascostroma F culture on PDA G section through the ascostroma H ostiolar canal I peridium J–M ascospores N–P asci. Scale bars: 40 μm (G); 10 μm (H–P).
