Yuea O.E. Erikss., Mycotaxon, 2003

Daranagama, Dinushani A., Liu, Xingzhong, Chamyuang, Sunita, Stadler, Marc, Bahkali, Ali. H. & Hyde, Kevin D., 2016, Towards a natural classification of Sordariomycetes: The genera Frondisphaeria, Immersisphaeria, Lasiobertia, Pulmosphaeria and Yuea (Sordariomycetes incertae sedis), Phytotaxa 258 (2), pp. 153-163 : 160-161

Yuea O.E. Erikss., Mycotaxon 85: 314 (2003)

facesoffunginumber: FoF01355

Notes:— The monotypic genus Yuea was introduced to accommodate Anthostoma chusqueicola Speg. , which was placed in Diatrypaceae by Eriksson (2003). Anthostoma chusqueicola , however is not related to the generic type Anthostoma decipiens (DC.) Nitschke , which is now included in Cryptosphaeria Ces. & De Not. ( Eriksson 2003) . Yuea chusqueicola O.E. Erikss. (= Anthostoma chusqueicola ) is a bambusicolous fungus characterized by immersed, non-clypeate ascomata, with a J+, apical apparatus and ascospores with a helical germ slit ( Eriksson 2003). According to these morphological characters Eriksson (2003) considered the new genus to be similar to several genera in Xylariales , especially genera in Xylariaceae , which have ascospores with helical germ slits (i.e. Helicogermslita , Rosellinia , Kretzschmaria ) but since most of them are stromatic with embedded perithecia he did not place Y. chusqueicola in any of them. Eriksson (2003) considered Yuea in Xylariales genera incertae sedis. However it is noteworthy that there are several genera in Xylariaceae with reduced stromata such as Anthostomella , Ascotricha , Calceomyces and Coniolariella . Therefore a possible relationship with the family Xylariaceae can be suggested for Yuea , considering the dark, immersed, ostiolate ascomata, 8-spored, cylindrical asci with J+, discoid apical apparatus and pigmented, ellipsoidal ascospores with a helical germ slit.

Type species:— Yuea chusqueicola O.E. Erikss., Mycotaxon 85: 314 (2003).

Facesoffunginumber: FoF01356.

On culms of Chusquea cummingii Nees. Sexual morph: Ascomata 500–700 × 300–400 μm (x = 678 × 355

μm, n = 10), individual ascomata seated in a separate cavity in the bamboo and covered by a thin crust of bamboo fragments, scattered, flattened, subglobose, non-clypeate, with a faint blackening zone around the ostiole, central ostiolar neck broad and short, with shiny black hymenium. Ostioles sometimes slightly papillate. Peridium 15–20 μm (x = 17 μm, n = 10) wide, strongly compressed, thin walled, outwardly comprising brown cell layers, inwardly hyaline cell layers. Hamathecium comprising sparsely branched paraphyses, less than 5 μm wide at the base, immersed in the gelatinous mass between asci. Asci 250–300 × 10–12 μm (x = 285 × 11.5 μm, n = 20), 8-spored, unitunicate, cylindrical, short pedicellate, with J+, apical apparatus. Ascospores 25–32 × 8–10 μm (x = 28 × 8.7 μm, n = 20), overlapping uniseriate, unicellular, brown, ellipsoidal-subcylindrical, equilateral or slightly inequilateral, terete or slightly compressed, apically rounded, sometimes attenuated towards one or both ends, smooth, aseptate, with few irregular oil droplets, with spiral germ slit, spiraling one full circumstance, 5 μm from the ends of spores, distinct, firm, with a 0.7 μm wide, gelatinous sheath. Asexual morph: Undetermined (re-described from Eriksson 2003).