Open Access Article Nova Hedwigia, Vol. 109 (2019), Issue 3-4, 355–368 Published online August 21, 2019; published in print November 2019 Microkamienskia gen. nov. and Microkamienskia peruviana, a new arbuscular mycorrhizal fungus from Western Amazonia Mike Anderson Corazon-Guivin1*, Agustin Cerna-Mendoza1, Juan Carlos Guerrero-Abad1,2, Adela Vallejos-Tapullima1, Santos Carballar-Hernández3, Gladstone Alves da Silva4, Fritz Oehl5* 1 Laboratorio de Biología y Genética Molecular, Universidad Nacional de San Martín, Jr. Amorarca N° 315, Morales, Peru 2 Laboratorio de Fisiología y Biotecnología Vegetal, Universidad Nacional Toribio Rodriguez de Mendoza, Calle Higos Urco N° 342-350-356 – Calle Universitaria N° 304, Chachapoyas, Perú. 3 Laboratorio de cultivo in vitro. Universidad de la Ciénega del Estado de Michoacán de Ocampo, Avenida Universidad, 3000, col. Lomas de la Universidad, 59103 Sahuayo, Michoacán, Mexico. 4 Departamento de Micologia, CB, Universidade Federal de Pernambuco, Av. da engenharia s/n, Cidade Universitária, 50740-600, Recife, PE, Brazil 5 Agroscope, Competence Division for Plants and Plant Products, Ecotoxicology, Müller-Thurgau- Strasse 29, CH-8820 Wädenswil, Switzerland * Corresponding author:
[email protected] With 10 figures Abstract: A new arbuscular mycorrhizal (AM) fungus, Microkamienskia peruviana, was detected in bait cultures for arbuscular mycorrhizal fungi established with rhizospheric soil substrates of the inka nut (Plukenetia volubilis). The field soil derived from three agricultural plantations in the Amazonia lowlands of the province Lamas, San Martin State, in Peru. The fungus was subsequent- ly propagated in single species cultures on Sorghum sp., Brachiaria sp., Medicago sativa and P. volubilis as host plants. The new species differentiates hyaline spores regularly in spore clusters, up to 500–800 × 400–600 μm.