Taxonomy of Exophiala jeanselmei (Langeron) McGinnis and Padhye

Abstract

The black yeast-like fungus Exophiala jeanselmei (Langeron) McGinnis et Padhye was originally described as Torula jeanselmei by Langeron. Since its original description in 1928, this dematiaceous hyphomycete has been placed in the genera Phialophora, Pullularia and Rhinocladiella by various authors. Study of the type culture of E. jeanselmei has confirmed that the principle conidiogenous cells of this fungus are annellides, thus supporting its current generic disposition. After reviewing the neotype culture of Phialophora gougerotii (Matruchot) Borelli sensu Borelli, the type culture of Torula bergeri Langeron, authentic cultures of Margarinomyces heteromorpha (Nannfeldt) Mangenot sensu Mangenot, the type culture of Trichosporium heteromorphum Nannfeldt and the neotype culture of Exophiala mansonii (Castellani) de Hoog sensu de Hoog, as well as additional cultures, it was concluded that P. gougerotii sensu Borelli, T. bergeri and M. heteromorpha sensu Mangenot pro parte are conspecific with E. jeanselmei. Trichosporium heteromorphum and E. jeanselmei are not conspecific as suggested by some workers, Tr. heteromorphum is a distinct species and should be referred to as Phialophora heteromorpha (Nannfeldt) Wang. Sporotrichum gougerotii Matruchot is considered to be a later synonym of Sporothrix schenckii Hektoen et Perkins and E. mansonii sensu de Hoog as a later synonym of Microsporum mansonii Castellani. M. mansonii is held to be a later synonym of Malassezia furfur (Robin) Baillon. The neotype culture of E. mansonii produces phialides without collarettes.

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