Freshwater Ascomycetes - Species Monograph

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Genus	Species	Author
Lindgomyces	ingoldianus	(Shearer & K.D. Hyde) K. Hiray., Kaz. Tanaka & Shearer
Class	Order	Family
Dothideomycetes	Pleosporales	Lindgomycetaceae

Genbank ID: 673940 MycoBank ID: MB515189

Synonymy:

Massarina ingoldiana

Description

Habit:

Saprobic, ascomata solitary to clustered, immersed, becoming superficial on dead, submerged wood.

Ascomata:

Ascomata solitary to clustered, immersed, becoming superficial by sloughing off of host, subglobose to flattened globose, ostiolate, papillate, with or without clypeus, black, 180-310 µm high, 185-500 µm wide.

Peridium:

Peridium 20-48 µm wide, inner layer of hyaline, elongate, thin-walled cells, cells 20-30 x 4-7 µm at sides, 12-16 x 4-6 µm at base, outer layer of very small, thin-walled, isodiametric, often compressed cells, outer cells interspersed among host cells, outermost cells and cells of clypeus occluded with brown amorphous material.

Beak:

Beaks central, cylindrical, periphysate, 65-113 x 73-122 µm, wall thicker at base, outer cells at base darkened and occluded with brown amorphous material, forming a clypeus-like structure.

Hamathecium:

Pseudoparaphyses septate, 1.5-3.0 µm wide, filamentous, hyaline, anastomosing, embedded in a gelatinous matrix.

Ascus:

Asci fissitunicate, oblong to cylindrical, broadly rounded at apex, tapering to stipe at base, 98-250 x 20-44 µm (type specimen - 146-220, x=188 x 25-36, x=28.3 µm, n-20), thick-walled: wall at side 2-6 µm thick, wall at apex 8-22 µm thick, with or without a very short cylindrical apical chamber; stipe short, 14-22 x 4-6 µm, often strongly curved, containing eight 3-4 seriate ascospores.

Ascospore:

Ascospores 1-septate, becoming 3-5 septate late in development, fusiform, slightly constricted at mid-septum, hyaline, becoming pale brown with age, filled with small lipid droplets to give a foamy appearance, often guttulate, 38-70 x 7-16 µm (type specimen - 46-62, x=53.7 x 7-12, x=9.83 µm, n=30).

Sheath:

Surrounded by a fusiform gelatinous sheath, which expands to form a long, amorphous, sticky enveloping sheath.

Appendage:

None observed.

Culture:

Colonies on EmersonÕs yeast extract soluble starch agar immersed with a dense flattened mat of aerial hyphae; immersed hyphae brown-black, aerial hyphae dark golden brown; hyphae causing a brown pigmentation of the surrounding agar.

Anamorph:

unknown