R. F. Cain

The genus Thielavia

The genus Thielavia Zopf is defined according to revised concepts and the species enumerated. It is suggested that species of Chaetomidium (Fckl.) Sacc. are not sufficiently different from those of Thielavia to warrant generic separation and are nearly all transferred to the latter genus. Short descriptions are provided for all 25 species and varieties of Thielavia together with a synoptic plate for their identification. References are given under each species to published illustrations. Among the excluded species are T. leptoderma Booth which is made the type species of a new genus, Aporothielavia, and T. ovata Booth, transferred to the genus Kernia Nieuwland.

Semidelitschia, A New Genus of the Sporormiaceae

Semidelitschia is described as a new genus of Loculoascomycetes with 1-celled, dark ascospores. It is placed provisionally in the Sporormiaceae next to Delitschia. A single species, S. agasmatica s...