The Lichens and Lichenicolous Fungi of Belgium and Luxembourg ...

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6 Diederich, P. & E. Sérusiaux (coll. P. P. G. van den Boom & A. M. Brand), 2000. - The lichens and lichenicolous fungi of Belgium and Luxembourg. An annotated checklist. - Musée nat. hist. nat., Luxembourg, 207 pp. This is the first annotated checklist of the lichens and lichenicolous fungi of Belgium, Luxembourg and northern France. A total of 1151 taxa are accepted, including 930 lichens (21 of which grow on other lichens), 201 lichenicolous fungi, and 20 doubtfully lichenized or related fungi. For each species, the name, synonymy, ecology, distribution in the study area, and pertinent literature reports for that area are provided. A further 252 species have been reported from the study area, but are considered here as doubtfully present, either because the corresponding material does not belong to this taxon, or because no material has been examined by the authors of this checklist. Les lichens et champignons lichénicoles de Belgique et du Luxembourg. Un catalogue annoté. - Ceci est le premier catalogue annoté des lichens et champignons lichénicoles de Belgique, du Grand-Duché de Luxembourg et du nord de la France. Un total de 1151 taxa sont acceptés, dont 930 lichens (y compris 21 parasitant d’autres lichens), 201 champignons lichénicoles et 20 champignons peut-être lichénisés ou espèces apparentées. Pour chaque espèce, le nom, la synonymie, l’écologie, la répartition dans le territoire étudié et la littérature concernant ce territoire sont donnés. De plus, 252 espèces ont été mentionnées du territoire étudié, mais leur présence y est considérée comme douteuse, soit parce que le matériel correspondant n’appartient pas à ce taxon, soit parce que ce matériel n’a pu être examiné par les auteurs de ce catalogue. De korstmossen en lichenicole schimmels van België en Luxemburg. Een geannoteerde checklist. - Dit is de eerste geannoteerde checklist van korstmossen en lichenicole schimmels met betrekking tot heel België, Luxemburg en Noord-Frankrijk. In totaal zijn 1151 taxa geaccepteerd, waaronder 930 korstmossen (waarvan er 21 op andere korstmossen groeien), 201 lichenicole schimmels, en 20 onduidelijk gelicheniseerde of op korstmossen gelijkende schimmels. Voor elke soort zijn naam, synoniemen, ecologie en verspreiding in het onderzochte gebied vermeld, evenals literatuurverwijzingen over dit gebied. Van 252 andere in deze checklist genoemde soorten is het voorkomen in het gebied onzeker, omdat de collecties mogelijk niet juist geïdentificeerd zijn of omdat ze niet door de auteurs zijn gecontroleerd. Paul Diederich, Musée national d’histoire naturelle, 25 rue Munster, L-2160 Luxembourg, Luxembourg (Paul.Diederich@ci.educ.lu). Emmanuël Sérusiaux, Chercheur Qualifié F. N. R. S., Département de Botanique, Sart Tilman, B-4000 Liège, Belgium (E.Serusiaux@ulg.ac.be). Pieter P. G. van den Boom, Arafura 16, NL-5691 Son, Netherlands (PvdBoom@zonnet.nl). A. Maarten Brand, Klipperwerf 5, NL-2317 DX Leiden, Netherlands. Cover photographs: Prof. Volkmar Wirth, Stuttgart (Gyalecta ulmi; Peltigera hymenina) and Prof. Maurice Hoffmann, Gent (Caloplaca ruderum and Diploicia canescens). Dutch text: Laurens Sparrius, Gouda.
L THE LICHENS OF BELGIUM AND LUXEMBOURG. AN ANNOTATED CHECKLIST 7 Introduction ichenology in Belgium and Luxembourg started in the early XIXth century, but it was especially towards the end of that century that national floras and checklists became available. In 1898, De Wildeman published a checklist of the Belgian lichens, with indications on localities and references for each species. One year before, Koltz (1897) did the same for Luxembourg. In 1938, Duvigneaud & Giltay presented a revised Belgian checklist, but this time without chorological data. The number of species recognized by these authors was rather low, with 586 species reported from Belgium, and only 404 from Luxembourg. After 1900, the lichenological exploration dramatically declined in these two countries, and it is only since the beginning of the sixties that, through the work of Prof. Jacques Lambinon, a new era of lichenology started. It is also during that time that Belgian lichenologists started exploring the neighbouring areas of northern France, which are therefore included within the scope of the present checklist. Since the early eighties, we have attempted to fill the gap by preparing a detailed inventory of crustose lichens, as well as of lichenicolous fungi which, although not lichenized, have traditionally been studied by lichenologists. The rapid development in lichen taxonomy, the new techniques to study them (e. g. by thin layer chromatography), the availability of modern illustrated floras, the continuous discovery of previously unknown taxa in Europe, and also the meticulous search in the field for minuscule, inconspicuous crusts in previously neglected habitats rapidly led us to discover or recognize over 700 additional species, which had never been recorded in Belgium or Luxembourg before. The precious help of several colleagues and friends, mainly from the Benelux countries, was invaluable to achieve these results. Nowadays, the total number of accepted species reaches 1151, more than twice the number of previously published taxa. Nevertheless, no doubt this number will continue to increase in the forthcoming years for several reasons: we know of many, often sterile crusts, that still require identification; several genera are poorly known in the area of study (e. g. Acarospora, Thelidium, Verrucaria); many lichenicolous fungi and some small, inconspicuous crustose lichens are only found by chance, and despite very careful sampling during these past years, many have certainly been missed; comparison with modern European floras or checklists suggests that a relatively large number of additional species might occur in the study area. Therefore the aim of the present checklist is to update our current knowledge of lichens and lichenicolous fungi in Belgium, Luxembourg and northern France, and to encourage students and botanists to pay attention to this fascinating world of organisms. Even if the exploration of our lichen flora might be considered as finished, students should not forget that many species are still very poorly recorded, and that much additional work, like the preparation of a distribution atlas or even the production of a modern flora, with complete identification keys, still have to be realized. Furthermore, we should not forget that lichens, which are excellent indicators of biodiversity, are vanishing rapidly, and that their conservation should be treated with priority.
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BOTRYDINA Bréb. THE LICHENS OF BEL
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CONIDA A. Massal. THE LICHENS OF BE
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EPILICHEN Clem. THE LICHENS OF BELG
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LEPTORHAPHIS Körb. THE LICHENS OF
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PHYSALOSPORA Niessl THE LICHENS OF
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SPILONEMA Bornet THE LICHENS OF BEL
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THYREA A. Massal. THE LICHENS OF BE
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Eopyrenula R. C. Harris grandicula
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