 Phylum：Ascomycota >> Class： Ascomycetes >> Order： Dothideales |
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 BCRC Number： |
NO BCRC Number! | |||
| Scientific Name： |
Dictyocyclus hydrangeae | |||
| Author： |
Dictyocyclus hydrangeae Sivan., et al., Bot. J. Linn. Soc. 126: 323-326. 1998. |
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| Description： |
Superficial mycelia absent. Ascostromata 290-350 μm wide, 88-112 μm high, discoid, black, scattered, hypophyllous, multilocular, opening by irregular fissures; locule 100-144 μm wide and 36-48 μm high arranged around a raised, sterile, central column of stroma 95-110 μm wide and 60-90 μm high penetratingt the host epidermis and distinctly discolouring the host cells below the epidermis to a brownish tinge. Peridium a single layer composed of more or less thick-walled brown cells, 5-7 μm long and 3-5 μm wide, radiating from the centre of a sterile, dark column. Asci 30-32 × 22-28 μm, obovoid, thick-walled, sessile, bitunicate, 8-spored interspersed amongst remanants of paraphysoidal elements. Ascospores 14-20 × 6-10.5 μm, obovoid, hyaline, thin-walled, dictyoseptate with 3-5- mostly 5-transverse septa and one longitudinal or oblique septum in some of the central cells but rarely in the end cells, sometimes enveloped in a mucilaginous sheath. | |||
| Specimens： |
Taiwan, Taitung County, 25 March, 1995, holotype IMI(371179). |
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| Habitat： |
Parasitic on leaves of Hydrangea intergrifolia Hayata. | |||
| Distribution： |
Taiwan |
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| References： |
Raciborski, M. 1900; Sivanesan, A and Sinha, ARP. 1989. |
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| Provided： |
W. H. Hsieh |
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| Note： |
Adonata is the only genus in the Parmulariaceae with dictyoseptate ascospores. Dictyocyclus differs from it by the multiloculate ascostromata opening by irregular fissures and its obovoid ascospores. | |||