ORIGINAL ARTICLE
A new species of Stigmatodiscus (Ascomycota, Dothideomycetes, Stigmatodiscaceae) from Juan de Nova (Mozambique Channel, Scattered Islands, French Southern and Antarctic Lands)
| 1 | UMS 2006 PatriNat (OFB – CNRS – MNHN), Muséum national
d’Histoire naturelle, Maison Buffon, CP41, 36 rue Geoffroy Saint-Hilaire
75005 Paris, France |
| 2 | University of Vienna, Department of Botany and Biodiversity Research,
Rennweg 14, 1030 Wien, Austria |
| 3 | Muséum national d’Histoire naturelle, Direction des collections, CP39,
57 rue Cuvier, 75231 Cedex 05 Paris, France |
Online publication date: 2022-12-09
Publication date: 2022-12-09
Plant and Fungal Systematics 2022; 67(2): 55–62
KEYWORDS
ABSTRACT
Stigmatodiscus touroultii (Stigmatodiscaceae, Stigmatodiscales) is described and
illustrated from corticated dead twigs of Salvadora angustifolia collected in Juan de Nova
(Scattered Islands, Mozambique Channel). It is characterized by the irregularly shaped pruinose
hymenial disc without distinct black marginal lips and a calcium oxalate crystal layer
in the epithecium. Phylogenetic analyses of a multigene matrix containing a representative
selection of Dothideomycetes from four genes (nucSSU-ITS-LSU rDNA, RPB2, TEF1 and
TUB2) revealed a highly supported placement within Stigmatodiscus as sister species to
Stigmatodiscus oculatus. Micromorphology of the sexual and asexual morph matches the
genus Stigmatodiscus. A key to all known species worldwide is provided.
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