ORIGINAL ARTICLE
A remarkable and widespread new lichenicolous species of Mycocalicium (Sphinctrinaceae) producing campylidia-like conidiomata and appendiculate conidia
1
Meise Botanic Garden, Department Research, Nieuwelaan 38, BE-
1860 Meise, Belgium
2
Fédération Wallonie-Bruxelles, Service général de l›Enseignement
supérieur et de la Recherche scientifique, rue A. Lavallée 1, BE-1080
Bruxelles, Belgium
3
Musée national d’histoire naturelle, 25 rue Munster, L-2160 Luxembourg
4
Institute of Systematic Botany, The New York Botanical Garden,
Bronx, NY 10458-5126, USA
5
Engineering office for biology, Waldweg 14, 8044 Weinitzen, Austria
6
University of Alberta, Department of Biological Sciences CW405,
Edmonton, AB T6G 2R3
Publication date: 2023-12-29
Plant and Fungal Systematics 2023; 68(2): 411-423
KEYWORDS
ABSTRACT
A lichenicolous fungus forming large black, vertically elongate, campylidia-like
conidiomata on the thallus of Ochrolechia was recently collected in Austria, Mexico and
the USA. The conidia are so remarkable in being multiappendiculate that initially no
existing fungal genera appeared to be suitable for its description. Nevertheless, molecular
phylogenetic analyses of nuITS and nuLSU sequences recovered the species within the
genus Mycocalicium. To date, no species of Mycocaliciales has been reported producing
appendiculate conidia. The species is described as new M. campylidiophorum. The new
species was also discovered in the type specimen of Opegrapha chionographa that was
collected in Colombia 163 years ago. This discovery led us to revise O. chionographa,
originally described as a lichen, and clarify that in fact the name applies to a lichenicolous
fungus based on type material that is an admixture of M. campylidiophorum, an Ochrolechia
and an Opegrapha species. The name is shown to apply to the Opegrapha species and
lectotypified as such. Opegrapha blakii is treated as synonym of O. chionographa.
FUNDING
NO
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