Fungalpedia – Note 869, Juncigena

 

Juncigena. Kohlm.

Citation when using this data: Huang SK et al. 2021 – Fungalpedia, Ascomycota.

Index Fungorum, Facesoffungi, MycoBank, GenBank., Fig 1 o–x

Classification: Incertae sedis, Incertae sedis, Hypocreomycetidae, Sordariomycetes, Pezizomycotina, Ascomycota, Fungi

Saprobic on leaves or culms in marine habitats. Sexual morph: Ascomata perithecial, solitary, immersed, pyriform to subglobose, brown, coriaceous, ostiolate, periphysate. Peridium composed of membranaceous, pale brown to hyaline cells of textura angularis to textura prismatica. Pseudoparaphyses filiform, septate, unbranched, attached at the top and bottom. Asci 8-spored, unitunicate, cylindrical, pedicellate, apex blunt, apical ring, blue in methylene blue, evanescent. Ascospores uni- to bi-seriate, ellipsoidal to fusiform, straight or slightly curved, hyaline, 3-septate, constricted at the septa, smooth-walled, guttulate. Asexual morph: Hyphomycetous. Hyphae hyaline to pale brown, septate, branched. Conidia developing directly on hyphae or on non-specialized short lateral conidiogenous cells, solitary, irregularly helicoid, pale brown to dark brown, 4–9-septate, smooth-walled, guttulate (adapted from Kohlmeyer et al. 1997).

Notes – Juncigena was introduced as a monotypic genus for J. adarca in Magnaporthaceae (Kohlmeyer et al. 1997). Schoch et al. (2007) sequenced the type and placed this genus in Juncigenaceae (Jones et al. 2014). Later, the second species J. fruticosae was introduced from the hyphomycetous Moheitospora fruticosae based on sequence data (Abdel-Wahab et al. 2010). In this study, Juncigena is sister to Khaleijomyces and Marinokkulati (75%ML/0.91BY, Fig. 1).

Type species: Juncigena adarca Kohlm., Volkm.-Kohlm. & O.E. Erikss., Bot. Mar. 40(4): 291 (1997).

Other accepted species: Species Fungorum – search Juncigena.

 

image

 

Figure 1 – Etheirophora bijubata: a–n (NY-1315470, microslide of holotype). a Material. b Immersed ascomata. c–e Ascomata cross section. f Ostiole with periphyses. g–h Asci. i Paraphyses. j–n Ascospores; Juncigena adarca: o–x (NY-1276214, holotype). o Material. p Immersed ascoma on surface view. q–s Ascomata cross section. t Evanescent ascus. u–x Ascospores. Notes: t, v–x stained in Melzer’s reagent. Scale bars: b = 500 µm, c–e, p–s = 100 µm, f–g, i, t = 50 µm, h, j–n, u–x = 20 µm.

 

References

Abdel-Wahab MA, Pang KL, Nagahama T, Abdel-Aziz FA, Jones EBG. 2010 – Phylogenetic evaluation of anamorphic species of Cirrenalia and Cumulospora with the description of eight new genera and four new species. Mycological Progress 9(4), 537–558.

Jones EBG, Suetrong S, Cheng WH, Rungjindamati N et al. 2014 – An additional fungal lineage in the Hypocreomycetidae (Falcocladium species) and the taxonomic re-evaluation of Chaetosphaeria chaetosa and Swampomyces species, based on morphology, ecology and phylogeny. Cryptogamie, Mycologie 35(2), 119–138.

Kohlmeyer J, Volkmann-Kohlmeyer B, Eriksson OE. 1997 – Fungi on Juncus roemerianus. 9. New obligate and facultative marine Ascomycotina. Botanica Marina 40, 291–300.

Schoch CL, Sung GH, Volkmann-Kohlmeyer B, Kohlmeyer J, Spatafora JW. 2007 – Marine fungal lineages in the Hypocreomycetidae. Mycological Research 111(2), 154–162.

 

Entry by

Shi-Ke Huang, State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang 550025, China, The Engineering Research Center of Southwest Bio-Pharmaceutical Resources, Ministry of Education, Guizhou University, Guiyang 550025, Guizhou Province, China, Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand, School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand, The Mushroom Research Centre, Guizhou University, Guiyang 550025, China

 

Published online 9 September 2025

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