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The genus Lobariella (Ascomycota: Lobariaceae) in Hawaii: late colonization, high inferred endemism and three new species resulting from “micro-radiation”

Published online by Cambridge University Press:  14 November 2017

Robert LÜCKING ,
Bibiana MONCADA  and
Clifford W. SMITH
Robert LÜCKING
Affiliation:
Botanic Garden and Botanical Museum, Königin-Luise-Straße 6–8, 14195 Berlin, Germany. Email: [email protected]
Bibiana MONCADA
Affiliation:
Licenciatura en Biología, Universidad Distrital Francisco José de Caldas, Cra. 4 No. 26B-54, Torre de Laboratorios, Herbario, Bogotá, Colombia; Research Associate, Integrative Science and Collections, The Field Museum, 1400 South Lake Shore Drive, Chicago, Illinois 60605, USA
Clifford W. SMITH
Affiliation:
Oahu Army Natural Resources Program, 3190 Maile Way, St. John Hall Room #409, Honolulu, HI 96822, USA
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Abstract

We assessed the taxonomy and phylogenetic relationships of Hawaiian species of the neotropical genus Lobariella. A single species was previously reported from the archipelago, the widespread neotropical L. crenulata. We targeted three loci of the mitochondrial and nuclear ribosomal rDNA gene cistron (mtSSU, nuLSU, ITS) and also performed a molecular clock analysis. Our results show that L. crenulata s. str. is seemingly present in the archipelago based on older herbarium collections. However, Hawaiian Lobariella includes three additional, presumably endemic, species unrelated to L. crenulata and new to science: L. flynniana Lücking, Moncada & C. W. Sm., with richly branched marginal phyllidia giving the thallus a fruticose appearance; L. robusta Lücking, Moncada & C. W. Sm., with a rather thick thallus and abundant, large, laminal phyllidia; and L. sandwicensis Lücking, Moncada & C. W. Sm., with a delicate thallus producing apothecia. Lobariella flynniana represents a novel morphotype within the genus, thus far known only from Hawaii. All three species are very closely related, forming a well-supported, monophyletic clade in spite of their morphological differences, suggesting local micro-radiation. Molecular clock analysis indicates that this clade colonized the islands between 1–8 mya and diverged between 0–2 mya. We interpret recent colonization as one of the main reasons why this clade has not diversified further.

Keywords

Kokee State ParklichenNeotropicsPseudocyphellariataxonomyWaikamoi ReserveWaimea District
Type
Articles
Information
The Lichenologist , Volume 49 , Issue 6 , November 2017 , pp. 673 - 691
Copyright
© British Lichen Society, 2017 

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