Mycological Progress

, Volume 8, Issue 2, pp 145–155 | Cite as

Ganoderma carocalcareus sp. nov., with crumbly-friable context parasite to saprobe on Anthocleista nobilis and its phylogenetic relationship in G. resinaceum group

  • Clovis Douanla-Meli
  • Ewald Langer
Original Article


A new species Ganoderma carocalcareus (Basidiomycota, Ganodermataceae) was collected on living trunk and dead stumps of Anthocleista nobilis (Gentianaceae) in waterlogged swamps in the Mbalmayo Forest Reserve, Cameroon, and identified on the basis of morphology and phylogenetic analyses inferred from mitochondrial small subunit (mtSSU) and internal transcribed spacer (ITS1-5.8S-ITS2) rDNA sequences. Distinct phenotypic characteristics of the new species are dimorphism of basidiomata and variability in context structure and texture over developmental stages. The young basidiomata is ungulate to punk-shaped with context composed of vegetative hyphae attended by scattered, orbicular, smooth, thick-walled chlamydospores, and the mature basidiomata is cushion- to bracket-like with context entirely consisting of chlamydospores masses. This ontogeny intimates the origin of chlamydospores, for which the biogenesis correlates the vanishing of vegetative hyphae throughout the basidiomata maturation. Morphological comparison included Tomophagus colossus (=G. colossus), G. subamboinense and G. weberianum, the known Ganodermataceae species producing chlamydospores and or gasterospores in basidiomata tissues, and G. resinaceum, the closest species with regard to morphology. It followed that G. carocalcareus could not be assigned to these or any other known Ganoderma species. Analyses of mtSSU and ITS rDNA sequence data resolved G. carocalcareus in the G. resinaceum group as a distinct species, but being a close relative of both G. subamboinense and G. weberianum.


Chlamydospores Laccate fungi Plant pathogen Swamped areas rDNA sequences 



The authors are much obliged to the curator of BR for loaning African specimens of T. colossus. Prof. Leif Ryvarden (University of Oslo) is thanked for nomenclatural counselling. We are especially grateful to Mr. Harald Rühling (Cell Biology, University of Kassel) for helping with SEM micrographs. Fieldwork was financially supported by the German Academic Exchange Service (DAAD) grant A/01/20502 to the first author.


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Copyright information

© German Mycological Society and Springer 2009

Authors and Affiliations

  1. 1.Fachbereich 18 Naturwissenschaften, Institut für Biologie, Fachgebiet ÖkologieUniversität KasselKasselGermany

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