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Mycologia, 96(2), 2004, pp. 411-417.
© 2004 by The Mycological Society of America

Systematics

Cataractispora receptaculorum, a new freshwater ascomycete from Hong Kong


Wai Hong Ho 1
Kevin D. Hyde
I. John Hodgkiss

     Centre for Research in Fungal Diversity, Department of Ecology and Biodiversity, The University of Hong Kong, Pokfulam Road, Hong Kong

A new species of Cataractispora, C. receptaculorum, is described from freshwater habitats. This species is characterized by triseptate verruculose ascospores and polar appendages that unfurl in water. The ascospores lack polar chambers that enclose the appendages as in C. bipolaris and C. viscosa. An ultrastructural study of this species revealed that the ascus wall and apical ring of this species is typical of the Annulatascaceae, while the ascospore wall with verruculose ornamentations and the ontogeny of the ascospore polar appendages are similar to the other species of Cataractispora. Cataractispora receptaculorum is illustrated with interference light, scanning and transmission electron micrographs.

Key words: Annulatascaceae, aquatic fungi, electron microscopy, spore appendage, taxonomy






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