Neophaeosphaeria filamentosa (Ellis & Everh.) M.P.S. Câmara et al., Mycol. Res. 107(5): 519 (2003)

            ≡ Leptosphaeria filamentosa Ellis & Everh., J. Mycol. 4(8): 76 (1888)

Pathogenic on dead parts in living leaves of Yucca filamentosa L. Sexual morph:Ascomata 115–157 μm high × 115–186 μm diam. (x̅ = 140 × 155 μm, n = 10), scattered or clustered in circular areas, immersed, depressed globose, with a small ostiolar pore slightly penetrating the surface through the host epidermis, under clypeus, coriaceous, dark brown to black, papilla not conspicuous. Peridium 18–30 μm (x̅ = 24 μm, n = 10) thick, composed of thin-walled, pseudoparenchymatous, cells of textura angularis. Hamathecium comprising 1.5–2.5 μm wide, cellular pseudoparaphyses, embedded in a gelatinous matrix. Asci 70–105 × 8–10 μm (x̅ = 85 × 10 μm, n = 20), 8-spored, bitunicate, fissitunicate, broadly cylindrical to oblong, with a short, broad pedicel apically rounded, 6–13 μm long, with an ocular chamber. Ascospores 12–15 × 4–5 μm (x̅ = 13 × 5 mm, n = 30), obliquely uniseriate and partially overlapping, yellowish brown, oblong, (1–)3-septate, constricted at the primary septum, cell above central septum widest, verruculose, containing four refractive globules. Asexual morph: Not observed in this collection.

Material examined: USA, New Jersey, Newfield, on dead parts in living leaves of Yucca filamentosa (Asparagaceae), July 1888, Ellis & Everhart (NY, holotype 00914294).

Fig.Neophaeosphaeria filamentosa.a Herbarium label. b, c Close-up of ascomata d Close-up of peridium. eArrangement of cellular pseudoparaphyses in hamathecium f-h Cylindrical asci with an indistinct ocular chamber. i-lAscospores with verruculose ornamentation. Scale bar: d = 70 µm, e = 10 µm, f-h = 20 µm, m-r = 5 µm.

Notes: Neophaeosphaeria was introduced by Câmara et al. (2003) when reassessing the Paraphaeosphaeria species with 3–4-septate ascospores. Asexual morphs produced ovoid to ellipsoid, aseptate, brown, verrucose to punctuate conidia, forming from percurrently proliferating conidiogenous cells. Neophaeosphaeria filamentosa was selected as the generic type. All species in Neophaeosphaeria are presently known from Yucca sp. (Asparagaceae).