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DOI: 10.3852/mycologia.100.1.68
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Mycologia, 100(1), 2008, pp. 68-80.
© 2008 by The Mycological Society of America

Tomentella africana, a new species from Benin (West Africa) identified by morphological and molecular data


Nourou Soulemane Yorou 1

     Department Biology I and Geo-Bio Centre, LMU, Organismic Biology: Mycology, Menzinger Straße 67, D-80638, München, Germany, and Laboratoire d’Ecologie Appliquée, Faculté des Sciences Agronomiques, Université d’Abomey-Calavi, 01 BP 526, Cotonou, Benin

Reinhard Agerer

     Department Biology I and Geo-Bio Centre, LMU, Organismic Biology: Mycology, Menzinger Straße 67, D-80638, München, Germany

A common resupinate thelephoroid fungus was collected in northern Guinean seasonal forests in central and north of Benin (West Africa). The species is reminiscent of Tomentella umbrinospora with respect to the color and thickness of basidiomata and rhizomorphs, the shape of basidiospores in frontal view and the size of subicular hyphae. Both species fall phylogenetically within two clades. Based on detailed anatomical comparison (mostly of rhizomorphs and basidiospores) with the holotype of T. umbrinospora and phylogenetic analyses including ITS rDNA sequences of 40 Tomentella species, T. africana is described as a new species. Genetic distance between the newly described species and T. umbrinospora is 12.1–12.9%, based on ITS rDNA sequences. T. africana is characterized anatomically by yellow-brown thick (0.3–0.8 mm) monomitic rhizomorphs that are commonly covered by irregularly shaped thin hyphae, thin- to thick-walled subicular hyphae of two size ranges, clavate and clamped basidia of 30–60 µm and light yellow to pale brown echinulate basidiospores with irregular shape in frontal view. Detailed anatomical and molecular dissimilarities between T. africana and close species are discussed. Differences between irregularly shaped surface thin hyphae and skeletal ones are highlighted. We stress the relevance of rhizomorphal structures in the discrimination of resupinate thelephoroid fungi.

Key words: anatomy, hyphal system, ITS rDNA sequences-based phylogeny, rhizomorphal structure, T. Africana, T. umbrinospora, tropical Africa

1 Corresponding author. E-mail: yorou2001{at}yahoo.fr






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Copyright © 2008 by The Mycological Society of America.