Abstract
A description is provided for Vizella gomphispora. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Vizella gomphispora was described from material on Symplocos spicata (Symplocaceae), from Sri Lanka. Other collections have been identified on Alstonia boonei (Apocynaceae), Chrysophyllum albidum (Sapotaceae), Coffea arabica, C. liberica and C. stenophylla (Rubiaceae), Conopharyngia longiflora (Apocynaceae), Craterispermum caudatum and C. laurinum (Rubiaceae), Cremaspora africana (Rubiaceae), Dendrophthora monstrosa (Viscaceae), Eugenia calophylloides (Myrtaceae), Ficus sp. (Moraceae), Funtumia elastica (Apocynaceae), Hoya sp. (Asclepiadaceae), Ilex denticulata (Aquifoliaceae), Ixora radiata (Rubiaceae), Macrolobium crassifolium (Leguminosae), Memecylon golaense (Melastomataceae), Nauclea sp. (Rubiaceae), Nectandra sp. (Lauraceae), Octoknema borealis (Olacaceae), Olax mannii (Olacaceae), Oxyanthus speciosus (Rubiaceae), Pavetta indica (Rubiaceae), Psychotria sp. (Rubiaceae), Soyauxia floribunda (Flacourtiaceae), Smeathmannia laevigata (Passifloraceae), Strychnos afzelii (Loganiaceae) and Tetrorchidium didymostemon (Euphorbiaceae). DISEASE: Occurring biotrophically on often symptomless living leaves. Its nutritional status is uncertain; perhaps the fungus obtains nutrients from cuticular waxes. Hughes (1953) suggested that the fungus may cause leaf spots, but it is more likely that it is either a secondary colonizer or survives necrotrophic damage by other agents. GEOGRAPHICAL DISTRIBUTION: pantropical; known from Brazil, Ghana, India, Jamaica, Kenya, New Guinea, Sierra Leone, Sri Lanka, Trinidad and Uganda. Collections identified as V. gomphispora from Australia (Queensland) and Zambia are present in IMI but probably belong to different species. TRANSMISSION: no studies have been made, but ascospores and their fragmented segments are almost certainly wind- or watersplash-dispersed, depending on local climatic conditions at the time of ascus maturity.