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Abstract
Homothallic zygospores of the endosymbiont fungus Tectimyces robustus (Harpellales) are described (and the species is emended) confirming its position within genus Tectimyces, where it was placed originally based on characteristics of the asexual trichospores and thallus. Zygospores in T. robustus are similar to those reported in T. leptophlebiidarum, although fine morphological differences and ontogenic features of sexual spores clearly delineate both species. A morphological comparison of T. robustus zygospores with other homothallic species of Harpellales is provided.
The author thanks Sergi Santamaria for his help in some of the field investigations and digital photograph preparations. The author also thanks Ll. Sáez for his collaborations in additional field explorations. This research was financed by MCYT and FEDER (REN2002-04068-C02-02 Flora Micológica Ibérica VI).