Pleosporales » Lindgomycetaceae » Lindgomyces

Lindgomyces breviappendiculatus

Lindgomyces breviappendiculatus (Kaz. Tanaka, Sat. Hatak. & Y. Harada) K. Hiray. & Kaz. Tanaka

Basionym: Lophiostoma breviappendiculatum Kaz. Tanaka, Sat. Hatak. & Y. Harada, Mycoscience 46(5): 288 (2005)

 

Index Fungorum number: IF515191

Holotype: HHUF 28194.

Etymology: From Latin brevi meaning short and appendiculatus meaning appendaged, referring to the short appendage-like structures formed by the ascospore sheath.

 

Sexual morph: Ascomata 220–400μm high, 300–550mm diameter, scattered or 2–3 crowded, immersed to erumpent, globose, with a round ostiole. Beak 50–115mm long, 85–100(–150) μm wide, short papillate, central. Ascomal wall textura angularis, 25–38(–50) μm thick at sides and base, composed of 4–6(–7) layers of polygonal, pale brown, slightly thick-walled cells of 5–18 ¥ 3–10μm, with sparse brown hyphae at sides. Pseudoparaphyses numerous, 1.5–2mm thick, septate, brunched. Asci (120–)127.5–165(–185) × 23.5–31(–32.5) μm (mean = 145.9 × 28.3μm, n = 85), fissitunicate, clavate, with an apical chamber, basal and somewhat lateral, with a short stipe 7–15(–20) μm long, with 8 ascospores biseriate above and uniseriate below. Ascospores (40–)44–60(–63.5) × (9.5–)11–17.5 μm (mean = 53.7 × 13.5mm, n = 90), L/W = 3.2–5.0 (mean = 4.1, n = 79), fusiform, slightly acute at the apex, narrowly rounded at the base, slightly curved, with a submedian (0.51–0.56; mean = 0.53, n = 78) septum, strongly constricted at the septum, hyaline, smooth, with an appendage-like narrow sheath 1–3mm long at both ends. Senescent ascospores brown, echinulate, with 1–5 darkened septa. Asexual morph: Undetermined. (Description form Tanaka et al. 2005)

 

Specimens examined: On submerged wood: R3, June 3, 2003, KT and SH 1214 (HHUF 28192), KT and SH 1215 (HHUF 28193; single ascospore isolate MAFF 239291 = JCM 12702), Sept. 7, 2003, KT and SH 1399 [HHUF 28194 holotype; isotypes IMI 391847 and HKU(M) 17479; single ascospore isolate MAFF 239292 = JCM 12701], KT and SH 1400–1403 (HHUF 28195–28198).

 

Morphology: See Tanaka et al. (2005) and Hirayama et al. (2010)

 

Freshwater distribution: Japan (Tanaka et al. 2005; Hirayama et al. 2010)

 

Notes: Lindgomyces breviappendiculatus was first described as Lophiostoma (L. breviappendiculatum) based on a generic concept proposed by Hyde et al. (2002), although the most characteristic feature of Lophiostoma, the slit-like ostiole of the ascomatal beak, was not found in this species (Tanaka et al. 2005). Certain characteristics of this species, such as lignicolous substrate in freshwater habitat, globose ascomata composed of polygonal cells, clavate asci with fissitunicate dehiscence and fusiform ascospores with a sheath elongated to form bipolar appendages, are in accordance with the concept of Lindgomyces. (Notes from Hirayama et al. 2010)

 

References

Hirayama K, Tanaka K, Raja HA, Miller AN, Shearer CA (2010) A molecular phylogenetic assessment of Massarina ingoldiana sensu lato. Mycologia 102:729–746

Tanaka K, Hatakeyama S, Harada Y (2005) Three new freshwater ascomycetes from rivers in Akkeshi, Hokkaido, northern Japan. Mycoscience 46:287–293. https://doi.org/10.1007/s10267-005-0248-6

 

Recent Genus

1
Neochlamydotubeufia
Neohelicomyces

Recent Species

Neohelicomyces submersus
Neohelicomyces hyalosporus
Neohelicomyces grandisporus