Dothideomycetes » Dothideomycetes, genera incertae sedis » Arkoola

Arkoola nigra

Arkoola nigra J. Walker & Stovold, Trans. Br. mycol. Soc. 87(1): 29 (1986).

            Index Fungorum number: IF 103048; Facesoffungi number: FoF 12130, Fig. 1, 2

Description: see Walker and Stovold (1986).

Material examined: see Walker and Stovold (1986).

Fig. 1 Arkoola nigra (DAR 43446, holotype). a Bitunicate ascus with fissitunicate dehiscence and thick endotunica still containing three ascospores. b Ascus tip of unexpanded (above) and expanded (below) ascus, showing ocular chamber and refringent staining zone. c Five ascospores, one showing thin sheath. Scale bars: A = 50 μm, B, C = 20 μm.

 Fig. 2 Arkoola nigra (DAR 43446, holotype). a Abnormal ascospores, one with shriveled apical cell. b Pseudoparaphyses. c Ascospores germinating in water mount. Scale bars: A (a, b) = 20 μm, B (c) = 40 μm.

Importance and distribution

Arkoola comprises only one species known on dead leaves of Glycine max (Fabaceae) in Australia (New South Wales).

 

Reference

Walker J, Stovold GE. 1986 – Arkoola nigra gen. et sp. nov. (Venturiaceae) causing black leaf blight of soybean in Australia. Transactions of the British Mycological Society 87, 23–44.

 

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