Pleosporales » Lophiotremataceae » Lophiotrema

Lophiotrema rubi

Lophiotrema rubi (Fuckel) Y. Zhang ter, C.L. Schoch & K.D. Hyde

Index Fungorum number: IF 515476

Basionym: Massaria rubi Fuckel, Jb. nassau. Ver. Naturk. 25-26: 303 (1871)

Synonymy: Didymellina rhaphithamni Keissl., Nat. Hist. Juan Fernandez Easter Isl. 2: 480 (1927)

Lophiostoma rubi (Fuckel) E.C.Y. Liew, Aptroot & K.D. Hyde, Mycologia 94(5): 812 (2002)

Lophiotrema emergens P. Karst., Hedwigia 22: 42 (1883)

Massarina emergens (P. Karst.) L. Holm, Les Ple- osporaceae: 149 (1957)

Massarina rubi (Fuckel) Sacc., Syll. fung. (Abellini) 2: 155 (1883)

Mycosphaerella rhaphithamni (Keissl.) Petr., Annls mycol. 38(2/4): 221 (1940)


Saprobic on submerged decaying wood in freshwater and marine habitats. Sexual morph: Ascomata 352–400 × 184–190 μm, immersed to partially immersed, hemispherical or pyriform, scattered, with black clypeus formed around the beak, dark brown to black. Beak 160 × 80μm, black on the outside and dark brown toward the inside, periphysate. Peridium 19.5–22.5 μm wide, of textura angularis, composed of 2 to 4 layers of pseudoparenchymatic cells; cells 5–10 × 2.5–8 μm. Pseudoparaphyses cellular, 1.5–2 μm wide, extending beyond asci and occasionally anastomosing or branching, with gel coating. Asci 70–80 × 8–10 μm, broadly cylindrical, fissitunicate, thick-walled, with ocular chamber visible in 5% KOH, narrowing to a hoof-shaped stalk, with eight overlapping ascospores. Ascospores 16–22 × 4–5.5 μm, broadly fusiform, hyaline, with upper cell slightly enlarged, 1-septate when young, becoming 3-septate at full maturity, guttulate, with bipolar appendages; appendages up to 2 µm long. Asexual morph: Undetermined. (Descriptions from Fallah and Shearer 2001)


Material examined: USA. Wisconsin: Vilas Co., Sparkling Lake, UTM Zone 16, 291184mE, 5099214mN, on submerged, partially decomposed wood, 17 Jun 1996, PMF and JLC P2-72 (ILLS 54046); Allequash Lake, UTM Zone 16, 296454mE, 5101163mN, 46°2.032'N, 89°37.82'W, on submerged, partially decomposed wood, 1 May 1997, PMF and JLC P4-49 (ILLS 5404 7).



Fallah PM, Shearer CA. (2001) Freshwater ascomycetes: new or noteworthy species from north temperate lakes in Wisconsin. Mycologia. 93(3):566-602.


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