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The long journey of Orthotrichum shevockii (Orthotrichaceae, Bryopsida): From California to Macaronesia

AuthorsVigalondo, Beatriz; Patiño, Jairo; Draper, Isabel; Mazimpaka, Vicente; Shevock, James R.; Losada-Lima, Ana; González-Mancebo, Juana M.; Garilleti, Ricardo; Lara, Francisco
KeywordsPhylogenetic analysis
Nonvascular plants
Canary Islands
North America
Issue Date13-Feb-2019
PublisherPublic Library of Science
CitationPLoS ONE 14(2): e0211017 (2019)
AbstractBiogeography, systematics and taxonomy are complementary scientific disciplines. To understand a species' origin, migration routes, distribution and evolutionary history, it is first necessary to establish its taxonomic boundaries. Here, we use an integrative approach that takes advantage of complementary disciplines to resolve an intriguing scientific question. Populations of an unknown moss found in the Canary Islands (Tenerife Island) resembled two different Californian endemic species: Orthotrichum shevockii and O. kellmanii. To determine whether this moss belongs to either of these species and, if so, to explain its presence on this distant oceanic island, we combined the evaluation of morphological qualitative characters, statistical morphometric analyses of quantitative traits, and molecular phylogenetic inferences. Our results suggest that the two Californian mosses are conspecific, and that the Canarian populations belong to this putative species, with only one taxon thus involved. Orthotrichum shevockii (the priority name) is therefore recognized as a morphologically variable species that exhibits a transcontinental disjunction between western North America and the Canary Islands. Within its distribution range, the area of occupancy is limited, a notable feature among bryophytes at the intraspecific level. To explain this disjunction, divergence time and ancestral area estimation analyses are carried out and further support the hypothesis of a long-distance dispersal event from California to Tenerife Island.
Publisher version (URL)https://doi.org/10.1371/journal.pone.0211017
Identifiersdoi: 10.1371/journal.pone.0211017
issn: 1932-6203
Appears in Collections:(IPNA) Artículos
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