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Unveiling a surprising diversity in the lichen genus Micarea (Pilocarpaceae) in Réunion (Mascarenes archipelago, Indian Ocean)

  • A. Maarten BRAND (a1), Pieter P. G. VAN DEN BOOM (a2) and Emmanuël SÉRUSIAUX (a3)


Detailed anatomical and chemical studies conducted on recent collections made in almost all suitable habitats on Réunion, a small remote tropical island in the Indian Ocean, yielded a surprising diversity in the widespread lichen genus Micarea (Pilocarpaceae, Lecanorales). Twenty-one species are recognized, including 13 described here as new to science. They are: Micarea alectorialica, M. bebourensis, M. borbonica, M. boryana, M. cilaoensis, M. hyalinoxanthonica, M. isidiosa, M. melanoprasina, M. pseudocoppinsii, M. pseudolignaria, M. sublithinella, M. takamakae and M. tenuispora. Notes on local ecology and important biogeographical features are also given and a key to the species is provided. Isidiiform areolae are reported for the first time in the genus (M. isidiosa and M. tenuispora), as well as the production of protolichesterinic and confluentic acids (M. sublithinella and M. takamakae, respectively). Two groups within the genus are species-rich on the island: the M. peliocarpa group with possibly 5 species, including 3 new to science, and the M. prasina group with 4 species, including 2 new to science. Micarea levicula is reported here for the first time since its description, and the status of the material that can be referred to M. micrococca s. lat. needs further study.



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Andersen, H. L. & Ekman, S. (2005) Disintegration of the Micareaceae (lichenized Ascomycota): a molecular phylogeny based on mitochondrial rDNA sequences. Mycological Research 109: 2130.
Aptroot, A. (2002) New and interesting lichens and lichenicolous fungi in Brazil. Fungal Diversity 9: 1545.
Baret, S., Rouget, M., Richardson, D. M., Lavergne, C., Egoh, D., Dupont, J. & Strasberg, D. (2006) Current distribution and potential extent of the most invasive alien species on La Réunion (Indian Ocean, Mascarene Islands). Austral Ecology 31: 747758.
Bass, D. & Richards, T. A. (2011) Three reasons to re-evaluate fungal diversity ‘on Earth and in the ocean’. Fungal Biology Reviews 25: 129164.
Blackwell, M. (2011) The fungi: 1, 2, 3 … 5.1 million species? American Journal of Botany 98: 426438.
Cáceres, M. E. S., Mota, D. A., de Jesus, L. S. & Aptroot, A. (2013) The new lichen species Micarea corallothallina from Serra da Jibóia, an Atlantic rainforest enclave in Bahia, NE Brazil. Lichenologist 45: 371373.
Cadet, T. (1977) La végétation de l′Ile de La Réunion: étude phytoécologique et phytosociologique. Ph.D. thesis, Université d'Aix-Marseille.
Camargo, A., Avila, L. J., Morando, M. & Sites, J. W. (2012 a) Accuracy and precision of species trees: effects of locus, individual, and base pair sampling on inference of species trees in lizards of the Liolaemus darwinii group (Squamata, Liolaemidae). Systematic Biology 61: 272288.
Camargo, A., Morando, M., Avila, L. J. & Sites, J. W. (2012 b) Species delimitation with ABC and other coalescent-based methods: a test of accuracy with simulations and an empirical example with lizards of the Liolaemus darwinii complex (Squamata: Liolaemidae). Evolution 66: 28342849.
Carstens, B. C., Pelletier, T. A., Reid, N. M. & Satler, J. D. (2013) How to fail at species delimitation. Molecular Ecology 22: 43694383.
Coppins, B. J. (1983) A taxonomic study of the lichen genus Micarea in Europe. Bulletin of the British Museuḿ (Natural History), Botany Series 11(2): 17214.
Coppins, B. J. (1999) Two new species of Micarea from South Africa. Lichenologist 31: 559565.
Coppins, B. J. (2009) Micarea. In The Lichens of Great Britain and Ireland. (Smith, C. W., Aptroot, A., Coppins, B. J., Fletcher, A., Gilbert, O. L., James, P. W. & Wolseley, P. A., eds): 583606. London: British Lichen Society.
Coppins, B. J. & Kantvilas, G. (1990) Studies on Micarea in Australasia I. Four new species from Tasmania. Lichenologist 22: 277288.
Coppins, B. J. & Tønsberg, T. (2001) A new xanthone-containing Micarea from Northwest Europe and the Pacific Northwest of North America. Lichenologist 33: 9396.
Czarnota, P. (2007) The Lichen Genus Micarea (Lecanorales, Ascomycota) in Poland. Polish Botanical Studies No. 23. Kraków: W. Szafer Institute of Botany, Polish Academy of Sciences.
Czarnota, P. & Coppins, B. J. (2005) A second Micarea with a hypothecial K+ violet pigment. Lichenologist 37: 477479.
Czarnota, P. & Guzow-Krzemińska, B. (2010) A phylogenetic study of the Micarea prasina group shows that Micarea micrococca includes three distinct lineages. Lichenologist 42: 721.
Edwards, S. V. (2008) Is a new and general theory of molecular systematics emerging? Evolution 63: 119.
Ekman, S., Andersen, H. L. & Wedin, M. (2008) The limitations of ancestral state reconstruction and the evolution of the ascus in the Lecanorales (Lichenized Ascomycota). Systematic Biology 57: 141156.
Elix, J. A., Jones, A. J., Lajide, L., Coppins, B. J. & James, P. W. (1984) Two new diphenyl ethers and a new depside from the lichen Micarea prasina Fr. Australian Journal of Chemistry 37: 23492364.
Fryday, A. M. (2004) New species and records of lichenized fungi from Campbell Island and the Auckland Islands, New Zealand. Bibliotheca Lichenologica 88: 127146.
Gaston, K. J. (2000) Global patterns in biodiversity. Nature 405: 220227.
Harris, R. C. (2009) Four novel lichen taxa in the lichen biota of eastern North America. Opuscula Philolichenum 6: 149156.
Hawksworth, D. L. (2012) Global species numbers of fungi: are tropical studies and molecular approaches contributing to a more robust estimate? Biodiversity and Conservation 21: 24252433.
Honegger, R. (1993) Developmental biology of lichens. Tansley Review No. 60. New Phytologist 125: 659677.
Huneck, S. & Yoshimura, I. (1996) Identification of Lichen Substances. Berlin, Heidelberg: Springer-Verlag.
Kalb, K. (2007) New or interesting lichens. III. Bibliotheca Lichenologica 95: 297316.
Kantvilas, G. & Elix, J. A. (1994) Ramboldia, a new genus in the lichen family Lecanoraceae . Bryologist 97: 296304.
Knowles, L. L. & Kubatko, L. S. (2010). Estimating species trees: an introduction to concepts and models. In Estimating Species Trees. Practical and Theoretical Aspects (Knowles, L. L. & Kutbako, L. S., eds): 114. Hoboken: Wiley-Blackwell.
Lacoste, M., Delbosc, P. & Picot, F. (2011) Typologie Descriptive des Habitats Naturels et Semi-naturels de La Réunion, Version Décembre 2011. Rapport technique no 8. Saint-Leu, Réunion: Conservatoire Botanique de Mascarin.
Lagabrielle, E., Rouget, M., Payet, K., Wistebaar, N., Durieux, L., Baret, S., Lombard, A. & Strasberg, G. (2009) Identifying and mapping biodiversity processes for conservation planning in islands: a case study in Réunion Island (Western Indian Ocean). Biological Conservation 142: 15231535.
Lücking, R., Rivas Plata, E., Chaves, J. L., Umaña, L. & Sipman, H. J. M. (2009) How many tropical lichens are there really? Bibliotheca Lichenologica 100: 399418.
Maddison, W. P. (1997) Gene trees in species trees. Systematic Biology 46: 523536.
Meyer, B. & Printzen, C. (2000) Proposal for a standardized nomenclature and characterization of insoluble lichen pigments. Lichenologist 32: 571583.
Orange, A., James, P. W. & White, F. J. (2010) Microchemical Methods for the Identification of Lichens. London: British Lichen Society.
Purvis, O. W. & James, P. W. (1993) Studies on the lichens of the Azores. Part 1. Caldeira Faial. Arquipélago, Life and Marine Sciences 11A: 115.
Romeike, J., Friedl, T., Helms, G. & Ott, S. (2002) Genetic diversity of algal and fungal partners in four species of Umbilicaria (lichenized Ascomycetes) along a transect of the Antarctic Peninsula. Molecular Biology and Evolution 19: 12091217.
Schmull, M., Miądlikowska, J., Pelzer, M., Stocker-Wörgötter, E., Hofstetter, V., Fraker, E., Hodkinson, B. P., Reeb, V., Kukwa, M., Lumbsch, H. T., et al. (2011) Phylogenetic affiliations of members of the heterogeneous lichen-forming fungi of the genus Lecidea sensu Zahlbruckner (Lecanoromycetes, Ascomycota). Mycologia 103: 9831003.
Sérusiaux, E., Brand, A. M., Motiejūnaitė, J., Orange, A. & Coppins, B. J. (2010) Lecidea doliiformis belongs to Micarea, Catillaria alba to Biatora, and Biatora ligni-mollis occurs in western Europe. Bryologist 113: 333344.
Strasberg, D., Rouget, M., Richardson, D. M., Baret, S., Dupont, J. & Cowling, R. M. (2005) An assessment of habitat diversity and transformation on La Réunion Island (Mascarene Islands, Indian Ocean) as a basis for identifying broad-scale conservation priorities. Biodiversity and Conservation 14: 30153032.
Suija, A., Lõhmus, P. & Motiejūnaitė, J. (2008) New Estonian records. Lichens and lichenicolous fungi. Folia Cryptogamica Estonica 44: 156159.
van den Boom, P. P. G. & Coppins, B. J. (2001) Micarea viridileprosa sp. nov., an overlooked lichen species from Western Europe. Lichenologist 33: 8791.
van den Boom, P. P. G., Brand, M., Ertz, D., Kalb, K., Magain, N., Masson, D., Schiefelbein, U., Sipman, H. J. M. & Sérusiaux, E. (2011) Discovering the lichen diversity of a remote tropical island: working list of species collected on Réunion (Mascarene archipelago, Indian Ocean). Herzogia 24: 325349.


Unveiling a surprising diversity in the lichen genus Micarea (Pilocarpaceae) in Réunion (Mascarenes archipelago, Indian Ocean)

  • A. Maarten BRAND (a1), Pieter P. G. VAN DEN BOOM (a2) and Emmanuël SÉRUSIAUX (a3)


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