Aspergillus baeticus sp. nov. and Aspergillus thesauricus sp. nov.: two new species in section Usti originating from Spanish caves
Author:
Alena Nováková, Vit Hubka, Cesareo Saiz-Jimenez and Miroslav Kolarik
Date: 18 July 2012
Abstract:
Two new species of Aspergillus that are clearly distinct from all known species in section Usti were revealed during a study of microfungal communities in Spanish caves. The novel species identified in this study and additional species of Aspergillus section Usti are associated with places and substrates related to human activities in caves. Novel species are described using a polyphasic approach that combines data from four loci (ITS, benA, caM and rpb2), morphology and basic chemical and physiological analyses. Aspergillus thesauricus sp. nov. was isolated from various substrates, including the decaying organic matter, cave air and cave sediment of the Cueva del Tesoro Cave (the Treasure cave). The species is represented by twelve isolates and is most closely related to the recently described A. germanicus. Aspergillus baeticus sp. nov. was isolated from the cave sediment in the Gruta de las Maravillas Cave (the Grotto of the Marvels) and is represented by two isolates. Additional isolate was found in the Cueva del Tesoro Cave and in the Demänovska Peace Cave (Slovakia), suggesting a potentially wide distribution of this microorganism. The species is related to A. ustus and A. pseudoustus. Both species are unable to grow at 37 °C, and a weakly positive, yellow Ehrlich reaction was observed in A. thesauricus. Unique morphological features alone are sufficient to distinguish both species from related taxa.
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