Pleurothecium yunanensis C.S. Long, Q.R. Li & Jian Ma, 2023

Chun-Sheng, Long, You-Peng, Wu, Xu, Zhang, Yan, Lin, Xiang-Chun, Shen, Jian, Ma & Qi-Rui, LI, 2023, Additions to hyphomycetes from Yungui Plateau, China with three new species (Ascomycota, Sordariomycetes), Biodiversity Data Journal 11, pp. 101629-101629 : 101629

Pleurothecium yunanensis C.S. Long, Q.R. Li & Jian Ma sp. nov.

Materials

Type status: Holotype. Occurrence: occurrenceID: 65AEAD76-F2A2-565F-9174-B0DB52CDA91C; Taxon : scientificName: Pleurothecium yunanensis; acceptedNameUsage: Pleurothecium yunanensis C.S. Long, Q.R. Li & Jian Ma, 2021, sp. nov.; parentNameUsage: Pleurothecium Höhn. 1919; kingdom: Fungi ; phylum: Ascomycota ; class: Sordariomycetes ; order: Pleurotheciales ; family: Pleurotheciaceae ; genus: Pleurothecium ; taxonRank: species; scientificNameAuthorship: C.S. Long, Q.R. Li & Jian Ma; taxonRemarks: species; Location : continent: Asia ; country: China; stateProvince: Yunnan; county: Nanjian county ; locality: Lingbaoshan National Forest Park ; verbatimElevation: 2532 m; locationRemarks: Labeltransliteration :" Nanjian County, Lingbaoshan National Forest Park, 18/8/2021,Long Chun-Sheng";[云南省南涧县灵宝山国家森林公园, 18/8/2021,龙春升]; verbatimCoordinates: 22.7324°N, 100.4232° E; georeferenceProtocol: label; Identification: identifiedBy: Chun-Sheng Long, Qi-Rui Li & Jian Ma; Event: samplingProtocol: collecting; eventDate: 18/8/2021; habitat: decaying wood; Record Level: language: en; institutionID: KUN-HKAS 12347; collectionID: GMB0396; institutionCode: KUN-HKAS 12347 Type status: Holotype. Occurrence: occurrenceID: 4FC9ABFC-435F-533D-931D- 15AD 95398CFF; Taxon: scientificName: Pleurothecium yunanensis; Location : continent: Asia ; country: China; stateProvince: Yunnan; county: Nanjian county ; locality: Lingbaoshan National Forest Park ; verbatimElevation: 2567 m; verbatimCoordinates: 22.7431N 100.4334E; Record Level: collectionID: GMB0394

Description

Saprobic on the surface of decaying wood (Fig. 4 ). Asexual morph: Conidiophores 370-206 μm long (x̅ = 270.9 μm, SD = 81.8, n = 18), 9.8-4.2 μm wide (x̅ = 6.5 μm, SD = 2.1, n = 18), mononematous, unbranched, erect, straight to slightly flexuous towards the apex, single, 4-5-septate, the lower part is black and the upper one is light brown or hyaline, smooth. Conidiogenous cells 10- 14 μm long (x̅ = 12 μm, SD = 2, n = 20), 2.5-3.5 μm wide (x̅ = 3 μm, SD = 0.5, n = 20), polyblastic, integrated, terminal, sometimes becoming intercalary, sympodially elongated, denticulate, denticles narrow cylindrical, hyaline. Conidial secession schizolytic. Conidia 17-25.6 μm long (x̅ = 22.1 μm, SD =3.6, n = 25), 2.8-9 μm wide (x̅ = 7.8 μm, SD = 1.3, n = 25), solitary, acropleurogenous, half-moon, guttulate, hyaline, 2-3-septate, smooth-walled. Sexual morph: Undetermined.

Etymology

With reference to Yunnan Province where the type specimen was found.

Notes

Pleurothecium is characterisedby the distinct brown conidiophores and polyblastic, sympodially extended, densiculate conidiogenic cells ( Monteiro et al. 2016). Pleurothecium yunanensis superficially resembles P. leptospermi J.A. Cooper and P. pulneyense Subram. & Bhat, but P. leptospermi differs by its smaller (15-18 × 4-5 μm vs. 17-25.6 × 2.8-9 μm) versicolored conidia with three eusepta ( Cooper 2005); P. pulneyense differs by its cylindrical to fusiform, larger conidia (23-30 × 7-8.4 µm vs. 17-25.6 × 2.8-9) with three eusepta ( Subramanian and Bhat 1987).

Figures

Figure 4. Pleurothecium yunnanensis (GMB 0395, holotype). A, B Colonies on natural substratum; C Conidiophore; D, E Conidiogenous cells and conidia; F Conidiogenous cells; G-I Conidia. Scale bars: A = 0.5 mm, B = 0.5 mm, C = 50 μm, D = 30 μm, E = 15 μm, F-I = 10 μm.