79c). Hamathecium of dense, long cellular pseudoparaphyses 1–2 μm broad, septate, branching (Fig. 79b). Asci 125–170(−195) × 15–22 μm (\( \barx = 153.8 \times 19.3\mu m \), n = 10), 8-spored, bitunicate, fissitunicate, cylindrical to cylindro-clavate,
with a short, narrowed, furcate pedicel which is 10–20 μm long, with an ocular chamber best seen in immature asci (to 5 μm broad × 3 μm high) (Fig. 79d and e). Ascospores 22–30 × 11–14 μm SU5402 (\( \barx = 27.1 \times 12.6\mu m \), n = 10) obliquely uniseriate and partially overlapping, ellipsoid, ovoid to fusoid, yellowish to yellowish brown, becoming reddish brown to dark brown, muriform, with 3-(4) transverse septa, constricted at the primary septum, part above central septum wider, vertical septa exist in each cell, ornamentation STA-9090 datasheet of foveolae in linear rows (Fig. 79f and g). Anamorph: Camarosporium yuccaesedum Fairm. (Ramaley and Barr 1995). Conidiomata 200–450 μm diam., pycnidial, immersed, scattered, subglobose to conoid, ostiolate. Macroconidiogenous cells determinate or indeterminate, enteroblastic,
hyaline, smooth. Macroconidia holoblastic, 20–36 × 10–15 μm diam., ellipsoid to narrowly ovoid, muriform, yellowish brown, 3–7 transverse septa, constricted at the septa. Microconidiogenous cells produced near or in the ostiole, hyaline, smooth. Microconidia 5–10 × 5–7 μm diam., globose to ovoid, aseptate, hyaline, smooth. Material examined: USA, Colorado, Montezuma County, hillside near entrance to Mesa Verde National Park, on dead leaves of Yucca baccata, 11 Oct. 1992, Ramaley Annette (9237A) (BPI 802381, holotype). Notes Morphology Pleoseptum is a monotypic genus established by Ramaley and Barr (1995) and represented by P. yuccaesedum based on its “immersed ascomata, thick peridium, muriform ascospores, anamorphic stage and the linoeate ornamentation of the ascospores and conidia”. The shape of ascomata of Pleoseptum is comparable with that of Chaetoplea,
but the peridium structure easily distinguishes them. Some species of Curreya, Leptosphaeria and Heptameria are comparable with Pleoseptum, but their anamorphic stages differ. Pleoseptum yuccaesedum and its Camarosporium Farnesyltransferase yuccaesedum anamorph both formed in the leaves of Yucca baccata and the ascomata and conidiomata were indistinguishable. Camarosporium is the anamorph of diverse teleomorph selleck products genera included in Botryosphaeriales and Cucurbitariaceae (Kirk et al. 2008). The genus is in need of revision (Sutton 1980) and is no doubt polyphyletic. Phylogenetic study None. Concluding remarks The placement of Pleoseptum under Phaeosphaeriaceae is still tentative. Pleospora Rabenh. ex Ces. & De Not., Comm. Soc. crittog. Ital. 1: 217 (1863). (Pleosporaceae) Generic description Habitat terrestrial, saprobic or parasitic. Ascomata small- to medium-sized, immersed, erumpent to superficial, papillate, ostiolate. Peridium thin. Hamathecium of dense, cellular pseudoparaphyses.