Journal
FRONTIERS IN MICROBIOLOGY
Volume 10, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fmicb.2019.00840
Keywords
freshwater; marine; morphology; phylogeny; Savoryellomycetidae; taxonomy
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Funding
- National Research Council of Thailand (NRCT) [60201000201]
- Thailand Research Fund (TRF) [RSA59800680]
- Ministry of Earth Sciences, Government of India [MOES/36/OO1S/Extra/40/2014/PC-IV]
- District Forest Office, Tiruvarur
- PCCF, Forest Department of Tamil Nadu, India
- Ministry of Earth Sciences, Government of India
- Distinguished Scientist Fellowship Program (DSFP), King Saud University, Saudi Arabia
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Morphology, phylogeny, and molecular clock analyses were carried out on Savoryellaceae in order to understand the placements of taxa in this family. Ascotaiwania and Neoascotaiwania formed a well-supported separate Glade in the phylogeny of concatenated partial SSU, LSU, TEF, and RPB2 gene data. These two genera share similar morphological features, especially in their asexual morphs, indicating that they are congeneric. Hence, we synonymize Neoascotaiwania under Ascotaiwania. Ascotaiwania hughesii (and its asexual morph, Helicoon farinosum) and Monotosporella setosa grouped in a Glade sister to Pleurotheciales and are excluded from Ascotaiwania which becomes monophyletic. A novel genus Helicoascotaiwania is introduced to accommodate Ascotaiwania hughesii and its asexual morph, Helicoon farinosum. A novel species, Savoryella yunnanensis is introduced from a freshwater habitat in Yunnan Province, China. Comprehensive descriptions and illustrations are provided for selected taxa in this family. In addition, we provide evolutionary divergence estimates for Savoryellomycetidae taxa and major marine based taxa to support our phylogenetic and morphological investigations. The taxonomic placement of these marine-based taxa is briefly discussed. Our results indicate that the most basal group of marine-based taxa are represented within Lulworthiales, which diverged from ancestral Sordariomycetes around 149 Mya (91-209) and Savoryellomycetidae around 213 Mya (198-303).
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