A morphological and phylogenetic evaluation of Marasmius sect. Globulares (Globulares-Sicci complex) with nine new taxa from the Neotropical Atlantic Forest
- Author: mycolabadmin
- 2020-06-11
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Summary
This research examined and reclassified a group of mushrooms found in Brazil’s Atlantic Forest, describing nine new species previously unknown to science. The study combined detailed physical examination of the mushrooms with DNA analysis to better understand how different species are related to each other. This work helps scientists better organize and understand fungal diversity.
Impacts on everyday life:
– Helps identify and catalog biodiversity in threatened forest ecosystems
– Contributes to understanding the role of fungi in forest health and ecology
– Provides foundation for potential future discoveries of useful compounds from fungi
– Improves scientific classification systems used to study and communicate about fungi
– Aids in monitoring environmental changes through fungal diversity
Background
The largest and most recently emended Marasmius sect. Globulares (Globulares-Sicci complex) has increased in number of species annually while its infrasectional organization remains inconclusive. Previous studies using ITS data only resulted in poor reconstruction of phylogenetic trees with most intermediate and deeper nodes unsupported.
Objective
To evaluate Marasmius sect. Globulares sensu Antonín & Noordel. by combining morphological examination and both single and multilocus phylogenetic analyses using LSU and ITS data, including Neotropical samples to a broader and more globally distributed sampling. The study aimed to better resolve phylogenetic relationships and propose a new infrasectional classification.
Results
Nine new species are described: Marasmius altoribeirensis, M. ambicellularis, M. hobbitii, M. luteoolivaceus, M. neotropicalis, M. pallidibrunneus, M. pseudoniveoaffinis, M. rhabarbarinoides and M. venatifolius. The analyses provided improved phylogenetic trees with stronger support for intermediate to deep nodes. Results showed that traditional series within sect. Sicci and sect. Globulares are non-monophyletic. Several monophyletic supraspecific groups equivalent to Singer’s stirpes concept were identified.
Conclusion
Based on the results, a new infrasectional classification is proposed with thirteen new series and three emended existing series. Three new subsections (Leonini, Spinulosi, and Globulares) are established to accommodate the series. The study provides evidence that Singer’s stirpes concept represents natural groups that should be elevated to series level within sect. Globulares.
- Published in:Persoonia,
- Study Type:Taxonomic Study,
- Source: 10.3767/persoonia.2020.44.09