Original paper

Acaulospora herrerae, a new pitted species in the Glomeromycetes from Cuba and Brazil

Furrazola, Eduardo; Tomio Goto, Bruno; Alves da Silva, Gladstone; Torres-Arias, Yamir; Morais, Thiago; Elizabete Pereira de Lima, Cláudia; Carenna Almeida de Ferreira, Araeska; Costa Maia, Leonor; Sieverding, Ewald; Oehl, Fritz

Abstract

A new Acaulospora species was isolated from the rhizosphere of Panicum maximum, Sporobolus indicus and Byrsonima crassifolia of a calcareous soil in Bayamo (Cuba). It was successfully propagated in single species cultures obtained after inoculation with multiple spores on Bracharia decumbens and Sorghum vulgare, respectively. It was also detected in several natural and agricultural sites in Northeastern Brazil. The spores are brown-yellow to yellowish brown, (50–)70–95(–112) μm in diam., and have a diagnostic pitted ornamentation on the outer surface of the structural wall layer. The pits are rounded, elliptical to elongated (vermiform or rugulate), and uniformly distributed leaving narrow bridges that regularly give the impression of a raised reticulum. Partial sequences of the LSU rRNA gene confirm the new fungus in a well separated, monophyletic clade within the Acaulosporaceae. The new fungus is here presented under the epithet Acaulospora herrerae in honor to Dr. Ricardo Herrera-Peraza, a highly appreciated former mycorrhizologist from La Habana, Cuba.

Keywords

arbuscular mycorrhizal fungicaribbeandiversisporalesglomeromycotasouth americataxonomytropics