Journal
MYCOKEYS
Volume -, Issue 59, Pages 95-131Publisher
PENSOFT PUBLISHERS
DOI: 10.3897/mycokeys.59.33182
Keywords
Caribbean; Chlamydospores; Fomes weberianus; Ganodermataceae; Paleotropics; South America
Categories
Funding
- Rufford Foundation, UK [17535-2]
- Universite Catholique de Louvain, Belgium (Scholarship from the Conseil de l'Action Internationale (CAI): Cooperation au developpement)
- University of Guadalajara
- CONACYT, Mexico
- Belgian State - Belgian Federal Science Policy through the BCCM research program
- FNRS/FRFC [FRFC 2.4544.10]
- Nouragues Travel Grant MYcorrhizal COmmon network of Trees on INselbergs (program 2013)
- CIUF/CUD through a PIC program (project CIUF-CUD-MUCL-Cuba)
- University of Guadalajara, Mexico
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Many species of Ganoderma exhibit a high phenotypic plasticity. Hence, particularly among them, the morphological specks concept remains difficult to apply, resulting in a currently confused taxonomy; as a consequence, the geographical distribution range of many specks also remains very uncertain. One of the areas with a strong uncertainty, as far as morphological species concept is concerned, is the Neotropics. It is common that names of species described from other regions, mainly from northern temperate areas, have been applied to Neotropical species. The aim of the present study was to determine which species might lay behind the G. weberianum complex in the Neotropics, using morphological studies and phylogenetic inferences based on both single (ITS) and multilocus (ITS, rpb2, and teff-alpha) sequences. The results indicated that G. weberianum sensu Steyaert, which is the usually accepted concept for this taxon, was absent from the Neotropics. In this area, G. weberianum sensu Steyaert encompassed at least two phylogenetic species, which are tentatively, for the time being, identified as belonging to G. mexicanum and G. parvulum. These two species could be distinguished morphologically, notably by the ornamentation or its absence on their chlamydospores. The results also showed that additional species from the Neotropics might still exist, including, c.g., G. perzonaium, but their circumscription remains uncertain until now because of the paucity of material available. Furthermore, it was found that the current concept of G. resinaceum embraced a complex of species.
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