MYCOTAXON Volume 105, pp. 337–342 July–September 2008 A new anamorphic fungus from Venezuela: Pyriculariopsis formosa Teresa Iturriaga titurri@usb.ve Departamento Biología de Organismos, Universidad Simón Bolívar, Apartado 89000. Sartenejas, Baruta, Edo Miranda, Venezuela Roberto Fernández 00-775@usb.ve Departamento Biología de Organismos, Universidad Simón Bolívar, Apartado 89000. Sartenejas, Baruta, Edo Miranda, Venezuela Rafael F. Castañeda Ruíz rfcastaneda@inifat.co.cu Instituto de Investigaciones Fundamentales en Agricultura Tropical ‘Alejandro de Humboldt’ (INIFAT) Calle 1 Esq. 2, Santiago de Las Vegas, C. Habana, Cuba, C.P. 17200 David W. Minter d.minter@cabi.org Cabi Bioscience, Bakeham Lane Egham, Surrey, TW20 9TY, United Kingdom Gabriela Heredia Abarca gabriela.heredia@inecol.edu.mx Instituto de Ecología, A.C., Km. 2.5 antigua carretera a Coatepec 325, Congregación El Haya, Xalapa, Veracruz, México. C.P. 91070 Abstract — Pyriculariopsis formosa anam. sp. nov. found on a decaying leaf of Clusia rosea in ‘Cerro El Ávila’, Caracas, Venezuela, is described and ilustrated. his species is characterized by erect, robust, unbranched conidiophores and obclavate, slightly rostrate, 5- to 7-septate, smooth conidia with two dark brown cells and the other conidial cells subhyaline. A key and illustrations of conidia of all Pyriculariopsis species are provided. Key words — conidial fungi, leaf litter, systematics, tropical rainforest Introduction During an expedition in 2007 to “Cerro El Ávila” near Caracas, Venezuela, a conspicuous anamorphic fungus from the genus Pyriculariopsis was collected.