Submitted to: Fungal Planet
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 1/18/2008
Publication Date: 2/20/2008
Citation: Rossman, A.Y., Farr, D.F., Akulov, A.Y. 2008. Cosmospora stegonsporii Rossman, Farr & Akulov, sp. nov. Fungal Planet. 23:1-2. Interpretive Summary: Fungi are a diverse group of organisms that cause serious diseases of crop plants and forest trees but are also used to control disease-causing organisms. Many new species of fungi have yet to be discovered and characterized for their use in controlling diseases. In this research a new species of fungi was discovered that grows in association with a pathogen of linden trees. This new species is named, described and illustrated in both its sexual and asexual state. This research will be used by foresters, plant pathologists and ecologists to study the interactions of this fungus with the pathogens on trees with the possibility of using it as a biological control agent.
Technical Abstract: A new species of fungi was discovered that parasitizes Stegonsporium on bark of living trees of Tilia cordata. The fungus is described in the genus Cosmospora in the Nectriaceae, Hypocreales, with the following characteristics: Ascomata on Stegonsporium, globose to broadly pyriform, 175-220 µm diam, 150-175 µm high, with short papilla, 30-40 µm diam, red to dark red, KOH+ dark red. Asci cylindric, 85-98 × 11-14 µm. Ascospores 16-18 × 8.0-9.5 µm, broadly ellipsoid, ends broadly rounded, 1-septate, slightly constricted, le brown at maturity, smooth to finely spinulose. The anamorph produced by single ascospores is Fusarium cf. merismoides-like.