Topic
Spiromastix
About: Spiromastix is a research topic. Over the lifetime, 4 publications have been published within this topic receiving 69 citations.
Papers
1 Jan 2002
TL;DR: Analysis of a data set that includes 12 non-molecular characters, partial nucLSU and mitochondrial small subunit RNA sequences for a subset of eight taxa provides strong evidence for the close association of Spiromastix grisea and the dimorphic pathogen Ajellomyces dermatitidis.
Abstract: Phylogenetic relationships within the Onygenales were inferred from maximum parsimony analyses of partial nuclear large ribosomal RNA subunit (nucLSU) sequences for 46 members of this order. The inferred phylogeny supports the division of the Onygenales into a number of separate lineages, two of which correspond to the Arthrodermataceae and Gymnoascaceae. The Onygenaceae, as circumscribed currently, is not monophyletic, and although the members of this family can be divided into a number of well-supported groups, the relationships among many of these taxa and their position relative to the Gymnoascaceae remain unresolved in our sequence-based phylogenies. Shanorella is more closely allied to the Arthrodermataceae than to the Onygenaceae. Our phylogenies provide additional evidence that a number of the morphological characters used to distinguish members of the Onygenales are of limited value for inferring phylogenetic relationships. Analysis of a data set that includes 12 non-molecular characters, partial nucLSU and mitochondrial small subunit RNA sequences (1406 bp) for a subset of eight taxa provides strong evidence for the close association of Spiromastix grisea and the dimorphic pathogen Ajellomyces dermatitidis. The new combination, Ajellomyces grisea (Currah & Locquin-Linard) Untereiner & Scott, is proposed.
29 citations
TL;DR: The phylogenetic positioning of the non-pathogenic genus Spiromastix in the Onygenales was studied and it was suggested that the helicoid peridial appendages were apomorphic and acquired independently in the two clades of the Onygeneceae sensu Udagawa.
27 citations
TL;DR: The new species of Spiromastix grisea is based on cultures obtained from gazelle dung collected in central Sahara, Africa and can be distinguished from other genera in the Onygenaceae with helical appendages on the basis of differences in morphology of peridial hyphae, ascospores, and appendages.
Abstract: Spiromastix grisea sp.nov. is described and illustrated based on cultures obtained from gazelle dung collected in central Sahara, Africa. Spiromastix grisea is similar to the type of Spiromastix, S. warcupii, in having thick-walled helical appendages, a loose, meshlike peridium of thin-walled hyphae, and minute, oblate ascospores. The new species differs from the type in having greyish brown rather than yellow brown ascomata, longer helical appendages, and larger ascospores, which are punctate only in the equatorial zone. The species of Spiromastix can be distinguished from other genera in the Onygenaceae with helical appendages (Ajellomyces, Apinisia, Kuehniella, and Shanorella) on the basis of differences in morphology of peridial hyphae, ascospores, and appendages. The species of Spiromastix lack anamorphs..
11 citations
TL;DR: Seven of the eight species lacked sexual states and only characters of asexual states and growth rates on different media could be used to characterize them, so the placement of Spiromastigaceae within Onygenales was supported.
Abstract: During a global investigation of fungi in house dust, we isolated six novel arthroconidial fungi. Phylogenies from combined analysis of nuc rDNA 18S, 28S and internal transcribed spacers sequences demonstrated that these fungi and two species preserved in culture collections represent undescribed species of Spiromastigaceae, Onygenales. Seven of the eight species lacked sexual states and only characters of asexual states and growth rates on different media could be used to characterize them. The eighth species produced ascomata only on water agar. We introduce six new species and one new combination in Spiromastix and validate the recently proposed family Spiromastigaceae, genus Pseudospiromastix and combination Ps. tentaculata. The new genus Sigleria is proposed for two new species that differ from Spiromastix by conidiophore branching patterns, slower growth and a limited ability to utilize nitrate as a sole N source. A key to the three genera of Spiromastigaceae, Spiromastix, Pseudospiromastix and Sigleria, is provided. Phylogenetic analyses support the placement of Spiromastigaceae within Onygenales.
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2016 | 1 |
| 2002 | 1 |
| 2001 | 1 |
| 1988 | 1 |