Kirschsteiniothelia, a new genus for the Microthelia incrustans-group (Dothideales)

The new generic name Kirschsteiniothelia is introduced for the group of species close to Microthelia incrustans. The genus belongs to the Dothideales and is referred to the Pleosporaceae. Six species are accepted: K. acerina, K. aethiops (anamorph: Dendryphiopsis alra), K. maritima, K. recessa, K. striatispora and K. thujina. A key to the species is provided and illustrations showing the variations in ascomatal development and ascospore sizes and shapes are included. In a review of the nomenclature of Microthelia it has been found necessary to provide a lectotype for Amphisphaerina and A. texensis is referred to Arthopyrenia.

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