Diaporthales genera incertae sedis » Diaporthales genera incertae sedis » Quintaria

Quintaria aquatica

Quintaria aquatica K.D. Hyde & Goh

Index Fungorum number: IF 460355


Sexual morph: Ascomata 390–450 µm high, 440–585 µm long, 130–185 µm wide, laterally com­ pressed, subglobose to globose in frontal view, fusiform in sagittal section, completely immersed beneath a cylindrical clypeus, with a longitudinal furrow at the top, ostiolate, coriaceous, clustered, and light-coloured. Peridium up to 30 µm thick, at the base and sides composed of vertically orientated elongate cells (textura angularis) and fusing at the sides with the clypeus and with the host cells at the outside. Clypeus up to 60 µm high, dome-shaped in frontal view, composed of small angular cells which are filled with numerous brown melanin particles. Ostiole depressed, in the centre of the apical furrow. Hamathecium of 1–1.5 µm wide trabeculae, branching and anastomosing above the asci, embedded in a gelatinous matrix. Asci 120–154 x 22–29 µm, 8- spored, clavate, bitunicate, fissitunicate, pedicellate, with an ocular chamber and apical thickening which appears ring-like, arising from the base of the ascomata. Ascospores 42–52 × 11–14 µm, ( = 46.7 x 20 n = 25), 2-3-seriate, ellipsoidal, (10–)11–13(–14) septate, fifth or sixth cell from top largest, constricted below this cell, hyaline, with a verrucose covering and thin sheath with a wavy outline. (Hyde and Goh 1999). Asexual morph: Undetermined.


Material examined: AUSTRALIA, north Queensland, Atherton Tablelands, Clohesy River, on submerged wood, May 1991, K.D. Hyde (HKU(M) 848)


Freshwater distribution: Australia (Hyde and Goh 1999)


Figs 22-25 Quintaria aquatica (HKU (M) 848, holotype). 22 Paramedian front al section of immersed ascoma. 23 Sagittal section of ascoma. 24 Section of clypeus. 25 Peridium at the sides of ascoma. Scale bars: 22 = 100 µm, 23–25 = 10 µm. (Hyde and Goh 1999)