Brunneiperidium gracilentum Daranag., Camporesi & K.D. Hyde, in Daranagama, Camporesi, Tian, Liu, Chamyuang, Stadler & Hyde, Fungal Diversity 73: 223 (2015)
Index Fungorum number: IF 809524; Facesofungi number: FoF 03026
Saprobic on wood. Sexual morph: Ascomata 300–315 μm diam., 360–400 μm high, semi-immersed, appearing as conical, dome-shaped areas, black, solitary, in cross section and globose, with a reduced central ostiolar canal, carbonaceous, black. Peridium 14–20 μm diam., outwardly comprising thick-walled, dark brown cells of textura angularis, lined with loosely arranged yellowish brown cells of textura irregularis and inwardly comprising thin-walled hyaline cells of textura irregularis. Paraphyses 4–5 μm diam., numerous, septate. Asci 120–135 9 10–15 μm, 8-spored, unitunicate, cylindrical, pedicellate, apically rounded with a discoid, J+, apical ring bluing in Melzer’s reagent, 2–3 μm diam. and 1–2 μm high. Ascospores 15–25 9 9–12 μm, uniseriate, unicellular, inequilaterally ellipsoidal, brown, smooth-walled, with a mucilaginous sheath, 1–1.5 μm thick, germ slit less than spore length, straight, with curved end. Asexual morph: Conidiophores up to 55–75 μm long and 2.9–3.4 μm diam., simple, hyaline, sometimes dichotomously branched, aseptate. Conidiogenous cells 15–20 9 2–3.5 μm diam., terminal, single, cylindrical. Conidia 3.5–5.4 μm diam., with thin 0.5 μm diam. mucilaginous sheath, hyaline, globose.
Material examined: ITALY, Province of Forlı`-Cesena, Fiumana-Predappio, on Tamarix gallica L. (Tamaricaceae), 22 Sep. 2013, Erio Camporesi IT1459 (MFLU 14–0229, holotype), ex-type cultures, MFLUCC 14–0011 = ICMP; Ibid. 22 Sep. 2013, Erio Camporesi IT1459 (PDD, isotype); Ibid.13 Nov. 2013, Erio Camporesi, IT1459-bis (MFLU 14–0230, PDD, paratypes), ex-paratype culture, MFLUCC 14–0559.
Notes: The genus was introduced by Daranagama et al. (2015). Brunneiperidium gracilentum shares macromorphological characters with certain Anthostomella species. However, the species differs in its unique peridium characters, with the outermost wall of irregularly arranged brown and yellowish-brown cells. Brunneiperidium gracilentum clusters into a monophyletic clade between Kretzschmaria and Xylaria.