Abstract
Two new species of Cladorrhinum, C. flexuosum and C. microsclerotigenum, are described and their sequences of the 5.8S and 28S ribosomal DNA and internal transcribed spacers 1 and 2 of the ribosomal RNA gene cluster analyzed. Cladorrhinum flexuosum, isolated from soil in Spain, forms fast-growing, dull yellow colonies, flexuous conidiophores and globose to dacryoid conidia. Cladorrhinum microsclerotigenum, isolated from Musa sp. in Turkey, strongly resembles Cladorrhinum phialophoroides in the production of abundant terminal phialides, ellipsoid conidia and microsclerotia in culture. It differs from C. phialophoroides in its ability to grow at 36 C and high number of intercalary phialides, which only infrequently occur in C. phialophoroides.
We are indebted to the curators of the Centraalbureau voor Schimmelcultures (CBS, Utrecht, the Netherlands) for providing some of the isolates studied. The first author thanks Dr Sybren de Hoog and Bert Gerrits van den Ende for guidance during a stay at CBS. This work was supported by the Spanish Ministerio de Ciencia e Innovación, grants CGL 2008-04226 and CGL 2009-08698/BOS.