The new species Ikaeria serusiauxii (Teloschistaceae, lichenized Ascomycetes) is described from the Madeira Archipelago, Canary Islands and continental Portugal. It is a crustose lichen on twigs and branches of trees and shrubs in xerophytic maritime vegetation. Superficially it is similar to Caloplaca cerina and C. haematites, from which it differs by the often black apothecium margin, very thick spore septa, black pycnidium ostioles, and the presence of the pigment Cinereorufa-green instead of Sedifolia-grey. ITS sequences suggest Ikaeria aurantiellina (syn. Caloplaca aegatica) as the closest relative. Added is a preliminary lichen checklist for Porto Santo (Madeira Archipelago, Macaronesia).
Arup, U., Søchting, U. & Frödén, P. 2013. A new taxonomy of the family Teloschistaceae. Nordic Journal of Botany 31: 016–083.
Carvalho, P., Figueira, R. & Jones, M. P. 2008. Os líquenes e fungos liquenícolas (Fungi) dos arquipélagos da Madeira e Selvagens In: Borges, P. A. V., Abreu, C., Aguiar, A. M. F., Carvalho, P., Fontinha, S., Jardim, R., Melo, I., Oliveira, P., Sequeira, M. M., Sérgio, C., Serrano, A. R. M., Sim-Sim, M. & Vieira, P., Listagem dos fungos, flora e fauna terrestres dos arquipélagos da Madeira e Selvagens. p. 95–103, [105]–122. Funchal, Angra do Heroísmo: Direcção Regional do Ambiente da Madeira and Universidade dos Açores.
Fletcher, A. & Laundon, J. R. 2009. Caloplaca. In: Smith, C. W., Aptroot, A., Coppins, B. J., Fletcher, A., Gilbert, O. L., James, P. W. & Wolseley, P. A. (eds), The lichens of Great Britain and Ireland, pp. 245–273. The British Lichen Society, Department of Botany, The Natural History Museum, London.
Follmann, G. 1990. Zur Kenntnis der Flechtenflora und Flechtenvegetation von Madeira und den umliegenden Inseln. I. Chorologisch-soziologischer Abriss. Courier Forschungsinstitut Senckenberg 129: 91–102.
Giralt, M., Nimis, P. L. & Poelt, J. 1992. Studien über den Formenkreis von Caloplaca flavorubescens in Europa. Cryptogamie, Bryologie-Lichénologie 13: 261–273.
Haugan, R. 1992. Anzia centrifuga, a new lichen species from Porto Santo, Madeira. Mycotaxon 44: 45–50.
Hoang, D. T., Chernomor, O., Haeseler, A. von, Minh, B. Q. & Vinh, L. S. 2018. UFBoot2: Improving the ultrafast bootstrap approximation. Molecular Biology and Evolution 35: 518–522.
Kondratyuk, S. Y., Lokös, L., Upreti, D. K., Nayaka, S., Mishra, G. K., Ravera, S., Jeong, M.-H., Jang, S.-H., Park, J. S. & Hur, J.-S. 2017. New monophyletic branches of the Teloschistaceae (lichen-forming ascomycota) proved by three gene phylogeny. Acta Botanica Hungarica 59: 71–136.
Kondratyuk, S. Y., Lokös, L., Halda, J. P., Farkas, E., Upreti, D. K., Thell, A., Woo, J.-J., Oh, S.-O. & Hur, J.-S. 2018. New and noteworthy lichen-forming and lichenicolous Fungi 7. Acta Botanica Hungarica 60: 115–184.
Krog, H. 1990. New Ramalina species from Porto Santo, Madeira. The Lichenologist 22: 241–247.
Krog, H. & Østhagen, H. 1980. Two new Ramalina species from Porto Santo, the Madeira Islands. Norwegian Journal of Botany 27: 185–188.
Kukwa, M., Schmitt, I. & Ertz, D. 2018. Ochrolechia incarnata comb. nov. (Lecanoromycetes, Ascomycota), a distinct species of the O. parella group from Europe and Macaronesia. – Phytotaxa 371(2): 119–126.
Meyer, B. 2002. Die Flechtengattung Clauzadea. Sendtnera 8: 85–154.
Nguyen, L.-T., Schmidt, H. A., Haeseler, A von, & B. Q. Minh, B. Q. 2015. IQ-TREE: A fast and effective stochastic algorithm for estimating maximum likelihood phylogenies. Molecular Biology and Evolution 32: 268–274.
Pitard, J. & Harmand, J. 1911. Contribution à l’étude des lichens des îles Canaries. Bulletin de la Societé Botanique de France 58, Mém. 22: 1–72.
Sérusiaux, E., van den Boom, P. & Ertz, D. 2010. A two-gene phylogeny shows the lichen genus Niebla (Lecanorales) is endemic to the New World and does not occur in Macaronesia nor in the Mediterranean basin. Fungal Biology 114: 528–537.
Sipman, H. & Aptroot, A. 2019. Pictures of PORTO SANTO lichens and lichenicolous fungi. https://archive.bgbm.org/sipma... [14 Aug. 2019].
Šoun, J., Vondrak, J., Søchting, U., Hrouzek, P., Khodosovtsev, A. & Arup, U. 2011. Taxonomy and phylogeny of the Caloplaca cerina group in Europe. The Lichenologist 43: 113–135.
Sparrius, L. B., Aptroot, A., Sipman, H. J. M., Pérez-Vargas, I., Matos, P., Gerlach, A. & Vervoort, M. 2017. Estimating the population size of the endemic lichens Anzia centrifuga (Parmeliaceae) and Ramalina species (Ramalinaceae) on Porto Santo (Madeira Archipelago). The Bryologist 120: 293–301.
Tehler, A., Dahlkild, A., Eldenas, P. & Feige, G. B. 2004. The phylogeny and taxonomy of Macaronesian, European and Mediterranean Roccella (Roccellaceae, Arthoniales). Symbolae Botanicae Upsalienses 34: 405–428.
Tehler, A., Ertz, D. & Irestedt, M. 2013. The genus Dirina (Roccellaceae, Arthoniales) revisited. – The Lichenologist 45(4): 427–476.
Timdal, E. 1992. A monograph of the genus Toninia (Lecideaceae, Ascomycetes). Opera Botanica 110: 1–137.
Trifinopoulos, J., Nguyen, L.-T., Haeseler, A. von & Minh, B. Q. 2016. W-IQ-TREE: a fast online phylogenetic tool for maximum likelihood analysis. Nucleic Acids Research 44 (W1): W232–W235.
Van den Boom, P. P. G. & Etayo, J. 2006. New records of lichens and lichenicolous fungi from Fuerteventura (Canary Islands), with descriptions of some new species. Cryptogamie, Mycology 27: 341–374.
Zakeri, Z., Divakar, P. K. & Otte, V. 2017. Taxonomy and phylogeny of Aspiciliella, a resurrected genus of Megasporaceae, including the new species A. portosantana. Herzogia 30: 166–176.
Líquenes do Porto Santo By J Campinho. 2021. Published by Imprensa Academia, Porto Santo, Madeira, Portugal. Pp. 150. 150 × 200 × 10 mm. ISBN 978-989-9062-07-8. Soft cover. €16.65. [In Portuguese]
André Aptroot
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