Freshwater Ascomycetes - Species Monograph

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Genus	Species	Author
Aquaticola	hyalomura	W.H. Ho, K.M. Tsui, Hodgkiss and K.D. Hyde
Class	Order	Family
Sordariomycetes	Inc. sed.	Inc. sed.

Synonymy:

Description

Habit:

On submerged wood in fresh water habitats.

Ascomata:

Ascomata 160–290 µm diam., 160–300 µm (Peruvian collections: venter = 88–121 µm diam, 78–115 µm high), globose to subglobose, immersed to superficial, coriaceous, white, becoming straw-colored and finally pale reddish brown, tissue of textura angularis in surface view, ostiolate, with a neck.

Peridium:

Peridium hyaline at first, becoming straw colored to pale brown with age, tissues of textura angularis in surface view.

Beak:

Necks 100¬–150 x 45–65 µm (Peruvian collections: 90–178 x 29–36 µm expanding to 34–82 µm at the apex), cylindrical, broadening at the apex, of parallel hyphae, periphysate, hyaline at first, becoming a rose-brown color.

Hamathecium:

Paraphyses 2–3.5 µm wide at the base, tapering slightly to a rounded apex, xxxx long, septate, mostly unbranched, occasionally branched.

Ascus:

Asci 52–63 x 7–8 µm (mean = 58 x 7.4 µm, n = 10), broadly oblong, pedicellate, unitunicate, thin-walled, persistent, apex slightly truncate, with a small faintly bipartite, refractive, J- apical ring (ca. 4 µm diam., 2 µm long).

Ascospore:

Ascospores 10–14 x 5–7 µm, (mean = 12.2 x 5.8 µm = 25) (Peruvian collection = 11–15 x 6–8 µm), overlapping uniseriate to biseriate, ellipsoidal, with rounded ends, hyaline, unicellular, smooth, thin-walled, with 2 large guttules, with a thin, mucilaginous sheath (ascospore sheath not seen in Peruvian collection).