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Discula Sacc. 1884
Details
Discula Sacc. 1884
Nomenclature
Sacc.
Sacc.
1884
674
ICN
Discula Sacc. 1884
genus
Discula
Classification
Subordinates
Synonyms
Associations
Descriptions
Discula Sacc. 1884
Specimen examined: on dying needles of Prumnopitys ferruginea (Bennett ex Don) de Laubenfels, Western Park, New Plymouth (TK), 15.ix.1994, B.J.Rogan, NZFRI-M 3988
Conidiomata acervular, amphigenous, intra- or sub-epidermal, finally erumpent with an irregular rupture of the overlying host tissue; conidiomatal wall thin, formed of pale brown cells; conidiomata 150-350 µm in diameter. Conidiophores hyaline, usually simple but occasionally branched, rarely septate, cylindrical, arising from the basal wall of the conidioma, 18-22 µm long. Conidiogenous cells phialidic, hyaline, smooth. Conidia hyaline, ellipsoid, 0-septate, sometimes with a narrow truncate base, prominently guttulate, 10-17 x 7-10 µm, creamy in mass.
The large size, particularly the width, of the conidia of this Discula sp. does not agree with the published description of any other species of Discula (von Arx 1970; Redlin & Stack 1988; Redlin 1991; Toti et al. 1992; Stanosz 1993; Carris 1995) but with only a single collection available for examination, it was not possible to determine whether or not it is a distinct species. Nevertheless, it is recorded here because of its possible pathogenic association with P. ferruginea (miro). The fungus was fruiting profusely on dying needles on a tree which showed considerable twig dieback. Many species of Discula are parasites, causing leaf spots, necrosis, and wilt of twigs (von Arx 1970).
Taxonomic concepts
Discula Sacc. 1884
Discula Sacc.
Discula Sacc. 1884
Discula Sacc. 1884
Discula Sacc. (1884)
Discula Sacc. 1884
Discula Sacc. (1884)
Discula Sacc. 1884
Discula Sacc.
Discula Sacc. 1884
Discula Sacc.
Gloeosporidium Höhn. (1916)
Gloeosporidium Höhn. (1916)
Global name resources
Collections
Notes
taxonomic status
Protect Apiognomonia 1917 over Discula 1884. "The concept of the genus Discula has never been clearly defined with species having diverse affinities in Gnomoniaceae."
taxonomic status
Allen et al. (2016) proposed new type species for Discula, D. destructiva, cause of digwood anthracnose. Original type species, D. platani, is an Ophiognomonia sp.
Metadata
1cb1ad5f-36b9-11d5-9548-00d0592d548c
scientific name
Names_Fungi
28 July 2000
20 January 2021