Lecanorales » Lecanoraceae » Lecidella

Lecidella yunnanensis

Lecidella yunnanensis Ekanayaka, & K.D. Hyde, in Hyde et al., Fungal Diversity: 10.1007/s13225-019-00429-2, [123] (2019)

Index Fungorum number: IF555468         Facesoffungi number: FoF05083

 

Sexual morph: 300–500 × 150–200 µm (x̄ = 368 × 181 µm, n = 10). Apothecia arising singly or in small groups, sessile, slightly erumpent from the substrate, pulvinate, black with shiny appearance. Receptacle convex. Margin distinct, black. Hymenium upper part dark brown and lower part hyaline, within a thick gelatinous matrix. Ectal excipulum composed of small, thin-walled, blackish cells of textura angularis, with algal cells. Medullary excipulum composed of narrow, long, thin-walled, hyaline cells of textura intricata. Paraphyses 1–2 µm wide (x̄ = 1.6 µm, n = 20), numerous, filiform, propoloid, septate, slightly swollen at the apices, apices are glued together to develop a pseudoepithecium. Asci 40–50 × 9–13 µm (x̄ = 45 × 12 µm, n = 30), 8-spored, cylindric-clavate, narrowed to the base, short pedicellate, rounded at the apex, amyloid ring absent at the ascus apex, croziers present at the base of asci. Ascospores 10–15 × 5–6 µm (x̄ = 12 × 5.4 µm, n = 40), hyaline when immature, greenish brown at maturity, smooth walled, ellipsoid, 1-septate, guttulate. Asexual morph: Undetermined.

 

Host and Habitat: Saprobic on dead stem of woody plant.

 

Known distribution: Yunnan, China.

 

Material examined: CHINA, Yunnan Province, Kunming, on dead stems, 25 April 2016, A.H. Ekanayaka, HC 001, HC004 (MFLU 17-1910, holotype).

 

GenBank Accession No: ITS: MK075945, LSU: MK075949 (MFLU 17-1910-a); ITS MK075946, LSU MK075950 (MFLU 17-1910-b).

 

 

 

Figure X. Lecidella yunnanensis (MFLU 17-1910, holotype). a Substrate. b Ascomata on wood. c Cross section of an ascoma. d Close up of a vertical section of the ascoma at margin. e A septate paraphyses. f–i Short pedicellate asci. j–m Ovate ascospores. Scale bars: c, d = 100 µm, e = 20 µm, f–i = 15 µm, j–m = 6 µm.

 

Notes: Lecidella yunnanensis is characterized by black, sessile, pulvinate apothecia, with a black disk with a shiny appearance, propoloid septate paraphyses, cylindric-clavate asci and ellipsoid ascospores. Lecidella yunnanensis is similar to L. enteroleucella; however, L. enteroleucella differs from L. yunnanensis by having black, greenish to reddish brown to olive disks and a hyaline hymenium layer (Nash et al. 2004). In the phylogenetic analysis, L. yunnanensis groups clearly distinct from known species of Lecidella (Hyde et al. 2019).

 

 

Reference:

1. Hyde KD, Tennakoon DS, Jeewon R, Bhat DJ et al. (2019) Fungal diversity notes 1036–1150: taxonomic and phylogenetic contributions on genera and species of fungal taxa. Fungal Divers. 96: 1–242.

2. Nash TH, Ryan BD, Gries C, Bungartz F (eds) (2004) Lichen Flora of the Greater Sonoran Desert Region, vol 2. Arizona State University, Tempe

 

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