title: Maravalia perae, a new species of rust fungus on Pera from Brazil.
abstract: A new species of rust fungus, Maravalia perae on Pera sp. (Euphorbiaceae), from Brazil is proposed. Spermogonia are type 5 and aeciospores and urediniospores are asymetrically obovoid to ellipsoid, with a concave side and 3(-4) equatorial germ pores. Teliospore walls are 2-5 pm thick at apex around the apical germ pore. This set of characters differentiates M. perae from other species of Maravalia. A revised key to all known Maravalia species, including the newly discribed species, is provided.
authors.affiliation: Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Pacheco Leão 915, CEP 22460-030, Rio de Janeiro, RJ, Brasil. anibal@jbrj.gov.br
authors.forename: Anibal A
authors.initials: AA
authors.lastname: de Carvalho
authors.forename: Joe F
authors.initials: JF
authors.lastname: Hennen
mesh_terms: D001487:Basidiomycota / Q000145:classification* / Q000166:cytology / Q000302:isolation & purification / Q000502:physiology*; D001938:Brazil; D019684:Magnoliopsida / Q000382:microbiology*; D013045:Species Specificity; D013172:Spores, Fungal / Q000166:cytology