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The Aspergillus ochraceus Group: Two New Species from Western Soils and a Synoptic Key

Martha Christensen
Mycologia
Vol. 74, No. 2 (Mar. - Apr., 1982), pp. 210-225
DOI: 10.2307/3792887
Stable URL: http://www.jstor.org/stable/3792887
Page Count: 16
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The Aspergillus ochraceus Group: Two New Species from Western Soils and a Synoptic Key
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Abstract

Two new species in the Aspergillus ochraceus group are described and compared to related taxa. Aspergillus bridgeri, from soils collected in a native community dominated by Atriplex gardneri in Wyoming, somewhat resembles A. elegans and A. lanosus, but differs in cultural and morphological details. Aspergillus campestris, from a native prairie in northern North Dakota, resembles A. dimorphicus in having metulae that are up to 35-45 μm long, but is a more restricted form with yellow conidial heads, taller conidiophores, occasionally septate metulae, and ellipsoidal conidia. A synoptic key is presented as an aid to identification of species in the A. ochraceus group-an assemblage which has increased considerably since 1965 and currently embraces 15 species. Brief descriptions of the species accompany the key along with distributional and ecological analyses prepared from species lists in more than 130 published surveys.

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