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Delimitation of Umbelopsis (Mucorales, Umbelopsidaceae fam. nov.) based on ITS sequence and RFLP data

Published online by Cambridge University Press:  13 May 2003

Wieland MEYER
Affiliation:
University of Sydney at Westmead Hospital, Centre for Infectious Diseases & Microbiology, Molecular Mycology Laboratory, Westmead, NSW 2145, Australia.
Walter GAMS
Affiliation:
Centraalbureau voor Schimmelcultures, P.O. Box 85167, 3508 AD Utrecht, The Netherlands. E-mail: gams@cbs.knaw.nl
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Abstract

In a continuation of studies started by de Ruiter et al. (1993), all known species of the Mortierella isabellina-group (Micromucor/Umbelopsis clade of O'Donnell et al. 2001) and a few other Mucorales and species of Mortierella were investigated by RFLP (including ITS1, 5.8S, ITS 2 and the 5′ end of the large subunit rDNA gene) and ITS1 sequence analyses. This monophyletic group is unrelated to Mortierella and is only distantly related to the core group of the Mucoraceae. M. longicollis falls outside the Umbelopsis clade. Molecular data resolved two subclades within the M. isabellina-group; however, they are not correlated with any differences in sporangial wall and shape, spore pigmentation and shape, or sporangiophore branching. Therefore we subsume all taxa in one genus, Umbelopsis. The new family Umbelopsidaceae and the new combinations U. isabellina, U. ramanniana, and U. autotrophica are proposed.

Type
Research Article
Copyright
© The British Mycological Society 2003

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Footnotes

Part 2 in the series ‘Approaches to the classification of the Mortierella isabellina-group.’ Part 1 appeared in Mycological Research97: 690–696 (1993).

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Delimitation of Umbelopsis (Mucorales, Umbelopsidaceae fam. nov.) based on ITS sequence and RFLP data
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Delimitation of Umbelopsis (Mucorales, Umbelopsidaceae fam. nov.) based on ITS sequence and RFLP data
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