Pleurovularia, a new genus of hyphomycetes proposed for a parasite on leaves of Microstegium sp. (Poaceae)
Journal
Mycoscience
Journal Volume
43
Journal Issue
1
Start Page
15
End Page
20
ISSN
1340-3540
1618-2545
Date Issued
2002
Author(s)
Abstract
The hyphomycete Ovularia polliniae, formerly excluded from Ramularia and allied genera and tentatively considered as related to Beniowskia sphaeroidea, was recently collected on leaves of the grass Microstegium sp. in Taiwan. Based on studies with light and transmission electron microscopy, O. polliniae was redescribed. Using type specimens, the taxonomic status of both fungal species was reevaluated. In O. polliniae, the conidiophores emerge directly through the outer cell wall of the host epidermis. They are either sparsely branched at the base or simple and composed of verruculose intercalary and terminal conidiogenous cells that produce conidia through minute, slightly darkened scars. The conidia are solitary, one-celled, obovoid, hyaline, smooth, and often have a large vacuole. By the combination of these characteristics, this fungus differs from similar species of Beniowskia, Ramularia, and Ramulariopsis. The new genus Pleurovularia and the new combination Pleurovularia polliniae are proposed to accommodate this parasite on Microstegium.
Subjects
Graminicolous fungus
Poaceae
Ramularia
Ultrastructure
Publisher
The Mycological Society of Japan
Type
journal article