Pleosporales » Wicklowiaceae » Wicklowia

Wicklowia aquatica

Wicklowia aquatica Raja, A. Ferrer & Shearer

Index Fungorum number: IF 515226

Etymology: Referring to the broadly obovoid conidia of this fungus.

Holotype: ILL 40790

 

Sexual morph: Ascomata 140–145 × 265–270 μm, subglobose, flattened dorsiventrally, ostiolate, black, immersed to erumpent, solitary to gregarious, appearing as a black oval to circular, shallow, crater-like depression on the substrate. Peridial wall ~25 ×m wide, composed of 4–5 layers of small pseudoparenchymatic cells. Pseudoparaphyses septate, sparse, 2 lm wide, in a gel matrix. Asci 60–95 × 18–26 μm, fissitunicate, in a gel matrix, broadly clavate, rounded at the apex, apical chamber not observed, tapering to a curved stalk, with eight overlapping biseriate to triseriate ascospores. Ascospores 25–30 × 7–9 μm (mean, 25 × 8 μm; n = 25), thin walled, cylindrical, rounded at the apices, slightly flattened on one side, hyaline, oneseptate, slightly constricted at the septum, with two large lipid globules in each cell, surrounded by a gelatinous sheath that expands in water to ~2 μm wide on each side of the ascospore; sheath attached at the base, with a gelatinous curtain extending downward from the base that fragments into filamentous appendages ~3–6 μm long, forming a subapical fringe; sheath and appendages staining blue in aqueous nigrosin. Asexual morph: Undetermined. (Descriptions from Raja et al. 2010)

 

Material examined: UNITED STATES OF AMERICA. Florida: Apalachicola National Forest, Apalachicola River at Fort Gadsden Landing, 29°56'00"N, 85°0'00"W, water temp. 9°C, pH 6, on submerged decorticated woody debris, 14 January 2006, Huzefa A. Raja and J.L. Crane, F76-2 (holotype: ILL 40790 = H.A. Raja and J.L. Crane F76-2). Ex-holotype culture, H.A. Raja F76-2.

 

Freshwater distribution: USA (Raja et al. 2010a)