The Imperfect State of Aphanoascus

Autor: Elmer E. Davis, S. C. Jong
Rok vydání: 1975
Předmět:
Zdroj: Mycologia. 67:1143-1147
ISSN: 1557-2536
0027-5514
DOI: 10.1080/00275514.1975.12019857
Popis: SUMMARY The type culture ATCC 26215 of Aphanoascus cinnabarinus, type species of the genus, is found for the first time to produce enteroblasticphialidic conidia, and Paecilomyces cinnabarinus is described to accommodate this conidial state. Light is essential for production of the Paecilomyces state but not for the Aphanoascus state. The fungus is proven to be homothallic and nonkeratinophilic. The separation between Aphanoascus and its closely related genera Byssochlamys, Talaromyces, Dactylomyces, Eupenicillium, and Hemicarpenteles is discussed. The genus Aphanoascus was erected by Zukal (1890) to accommodate a single species, A. cinnabarinus Zukal, which was isolated from alligator dung in Vienna in 1889. The fungus has recently been rediscovered by Udagawa and Takada (1973). Their isolates were forwarded to the American Type Culture Collection (ATCC) for conservation as ATCC 26215, ATCC 26216, and ATCC 26696. Apparently these collections are the only extant representatives of the species. Since none of Zukal's specimens exist, the ATCC 26215 was designated as the neotype. Udagawa and Takada placed Aphanoascus in the family Eurotiaceae of which, according to Malloch and Cain (1971, 1972), the conidial state is of the enteroblastic-phialidic type. However, no conidial state of A. cinnabarinus was reported. It is therefore of particular interest to know if Udagawa and Takada's isolates show a conidial state developmentally akin to the type now expected for the members of Eurotiaceae. The cultures of ATCC 26215, ATCC 26216, and ATCC 26696 were run through a series of tests on different media and substrates, including horse hair, under various environmental conditions. The results showed that all the cultures tested produced enteroblastic-phialidic conidia belonging to Paecilomyces Bainier on rabbit food agar under controlled temperature and light conditions and were not capable of colonizing and
Databáze: OpenAIRE
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