Journal
SYSTEMATIC BOTANY
Volume 37, Issue 4, Pages 835-844Publisher
AMER SOC PLANT TAXONOMISTS
DOI: 10.1600/036364412X656536
Keywords
Heterogeneous substitution rates; INAASE; inflated posterior probabilities; long-branch attraction; PICS-Ord; star-tree paradox
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Funding
- NSF [DEB-1145511, EF-0832858, DEB-1011504, EF-1115116, DEB-1110433]
- California Lichen Society, City University of New York, Cullman Program for Molecular Systematics at NYBG
- Nature Conservancy, Southern Appalachian Botanical Society
- Western Pennsylvania Conservancy
- Direct For Biological Sciences
- Div Of Biological Infrastructure [0832858] Funding Source: National Science Foundation
- Direct For Biological Sciences
- Div Of Biological Infrastructure [1115086] Funding Source: National Science Foundation
- Division Of Environmental Biology
- Direct For Biological Sciences [1110433] Funding Source: National Science Foundation
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Crustose, asexually reproducing taxa represent a large component of lichen biodiversity that is often overlooked and underestimated; as a result, remarkable potential remains for discovery of new species in this neglected, polyphyletic group. For this study, ITS and mtSSU rDNA sequences were analyzed in conjunction with chemical and anatomical data to understand the systematic placement of an enigmatic, sterile lichen. This species, despite references in the literature, and being known for over half a decade, has remained undescribecl due to our inability to integrate it into a higher-level taxonomic framework using morphology alone. Here we demonstrate the utility of a systematic methodology that combines molecular and non-molecular characters to place and circumscribe species of asexually reproducing lichens that are typically sterile. Based on our analyses, the new species, Caloplaca rep fans, shows phylogenetic and morphological affinities to a broad group of Caloplaca species with gray thalli, including the type species of the genus, C. cerium. This study highlights that the family Teloschistaceae is morphologically more diverse than previously understood, and contains elements that cannot easily be placed in known 'species groups.'
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