Juncigena Kohlm., Volkm.-Kohlm. & O.E. Erikss., Bot. Mar. 40(4): 291 (1997)
Hypocreomycetidae, Torpedosporales, Juncigenaceae, Juncigena
Index Fungorum number: IF27750; 2 morphological species (Species Fungorum 2021); 1 species with sequence data.
Saprobic on substrates in marine habitats. Sexual morph: Ascomata immersed, subglobose to pyriform, fuscous, coriaceous, solitary, ostiolate. Ostiolar canal hyaline to fuscous, cylindrical, periphysate. Peridium comprising many cell layers of ellipsoidal to subglobose cells forming textura angularis, outer cell layer dark and inner cell layer becoming hyaline. Paraphyses numerous, unbranched, connected to the apex and base of the peridium. Asci 8-spored, unitunicate, fusiform to cylindrical, with short pedicels, with J-, apical ring. Ascospores uni- to biseriate, hyaline, fusiform to ellipsoidal, generally 3-septate. Asexual morph: Asexual morph: Hyphomycetous. Hyphae septate, branched, hyaline. Conidiophores micronematous, aseptate to 2-septate, cylindrical to clavate, hyaline to yellow-brown. Conidiogenous cells determinate, terminal, monoblastic, integrated, holoblastic. Conidia brown, helicoid, rarely straight to one time contorted, acrogenous, usually, 0- to 2-septate, constricted at the septa, smooth-walled, slightly rough at maturity, thick-walled, regularly surrounded by mucilagenous sheath (adapted from Kohlmeyer et al. 1997, Abdel-Wahab et al. 2010).
Type species: Juncigena adarca Kohlm., Volkm.-Kohlm. & O.E. Erikss., Bot. Mar. 40(4): 291 (1997)
Notes: Juncigena Kohlmeyer et al. (1997) was initially included under Magnaporthaceae by Eriksson (1999). Further protein coding and rDNA based phylogeny by Schoch et al. (2006) revealed that Juncigena adarca clusters with Swampomyces sp. in Coronophorales. Jones et al. (2009) included Juncigena under Hypocreales incertae sedis. While resolving the TBM (Torpedospora/Bertia/Melanospora) clade with terrestrial Falcocladium, Jones et al. (2014) referred Juncigena under Juncigenaceae. Kohlmeyer et al. (1997) revealed that Cirrenalia adarca was the asexual morph of Juncigena adarca. Abdel-Wahab et al. (2010) transferred C. adarca to Moheitospora based on phylogenetic and morphological evidences. Réblová et al. (2016) referred Moheitospora fruticosae to Juncigena as the two genera are congeneric, and Juncigena has priority. The genus currently comprises Juncigena adarca and J. fruticosae. Juncigena is distinctive from other genera in having the cylindrical, short-pedicellate asci with an apical ring (Jones et al. 2014).
Species illustrated in this entry
Juncigena fruticosae (Abdel-Wahab, Abdel-Aziz & Nagah.) A.N. Mill. & Shearer
Abdel-Wahab MA, Pang KD, 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, 537–558.
Eriksson OE. 1999 – Outline of Ascomycota. Myconet 3, 1–88.
Jones EBG, Sakayaroj J, Suetrong S, Somrithipol S, Pang KL. 2009 – Classification of marine Ascomycota, anamorphic taxa and Basidiomycota. Fungal Diversity 35, 1–187.
Jones EBG, Suetrong S, Cheng WH, Rungjindamai N et al. 2014 – An additional fungal lineage in the Hypocreomycetidae (Falcocladium species) and the taxonomic revaluation of Chaetosphaeria chaetosa and Swampomyces species, based on morphology, ecology and phylogeny. Cryptogamie Mycologie 35, 119–138.
Kohlmeyer J, Volkmann-Kohlmeyer B, Eriksson OE. 1997 – Fungi on Juncus roemerianus. New obligate and facultative marin ascomycotina. Botanica Marina 40, 291–300.
Réblová M, Miller AN, Rossman AY, Seifert KA et al. 2016 − Recommendations for competing sexual-asexually typified generic names in Sordariomycetes (except Diaporthales, Hypocreales, and Magnaporthales). IMA fungus 7, 131−153.
Schoch CL, Shoemaker RA, Seifert KA, Hambleton S et al. 2006 – A multigene phylogeny of the Dothideomycetes using four nuclear loci. Mycologia 98, 1041–1052.