Schiffnerula aristolochiae, Hosagoudar & Thimmaiah & Jayashankara, 2011

Hosagoudar, V. B., Thimmaiah, C. Jagath & Jayashankara, M., 2011, Schiffnerulaceous fungi of Kodagu, Karnataka, India, Journal of Threatened Taxa 3 (12), pp. 2268-2671 : 2269-2270

Schiffnerula aristolochiae sp. nov. ( Image 3 )

Material examined: 04.xii.2009, on leaves of Aristolochia tagala Cham. (Aristolochiaceae) , Devara kadu, Hoddur, Kodagu, Karnataka, C. Jagath Thimmaiah TBGT 5703 (holotype), (MycoBank 564011).

Coloniae epiphyllae, subdensae vel densae, ad 2 mm diam., confluentes. Hyphae rectae vel subrectae, alternatae vel oppositae acuteque vel laxe ramosae, laxe reticulatae, cellulae 16–20 x 5–8 µm. Appressoria unilateralis, alternata vel raro opposita, ovata, globosa, mammiformes, crassa posita, integra, 10–15 x 7–10 µm. Conidiophorae Questieriella producentes hyphis lateralis, simplices, rectae, micronematae, mononematae, 0–2-septatae, 20–25 x 4–6 µm; cellulae conidiogenae terminalis, monoblasticae, integratae, solitaris, ellipsoidaleae; conidia recta vel curvula, pallide brunnea, 3-septata, plerumque in coloniis dispersa, 20–25 x 4–6 µm. Thyriothecia numera, orbicularis, portionio ad centralis dissolutus, portionio marginalis intactus et radiatus, ad 50µm diam.; asci ovalis, globosi, octospori, ad 20µm diam.; ascosporae conglobatae, brunneae, uniseptatae, plus minus constrictus ad septatus, 25–30 x 12–15 µm.

Colonies epiphyllous, subdense to dense, up to 2mm in diameter, confluent. Hyphae straight to to 20µm in diameter; ascospores conglobate, brown, uniseptate, more or less constricted at the septum, 25– 30 x 12–15 µm.

The conidia of Questieriella were scattered in the colonies, initially produced spores were intact and formed colonies. In case of subsequently produced spores, terminal cells were disintegrated; middle cells were deep brown, appressoria and mycelium produced from the central cells.

This forms the first report of the genus Schiffnerula on the members of Aristolochiaceae ( Hosagoudar, 2003, 2011).

Etyomology: Based on the host genus.

Figures

Image 3. Schiffnerula aristolochiae sp. nov.