Mariannaea
Mariannaea is a genus of fungi belonging to the family Nectriaceae.
The genus has cosmopolitan distribution.
The fungal genus was formally established by Samson to accommodate M. camptospora, M. elegans and the variety M. elegans var. punicea and was typified by M. elegans. The genus is characterized by branched, septate conidiophores with hyaline, flask-shaped phialides, 1–2-celled hyaline conidia mostly forming imbricate chains or slimy heads.
The sexual morph of Mariannaea has been linked to genus Nectria, and genus Cosmospora. However, Cosmospora and Nectria have been shown polyphyletic within the Nectriaceae family, while genus Mariannaea formed a monophyletic clade within Nectriaceae. Therefore, Gräfenhan et al. retained Mariannaea as a distinct genus in Nectriaceae.
Five new species were further introduced in the genus.
Species
As accepted by Species Fungorum;Mariannaea aquaticola Mariannaea atlantica Mariannaea camelliae Mariannaea camptospora Mariannaea chlamydospora Mariannaea cinerea Mariannaea clavispora Mariannaea dimorpha Mariannaea elegans Mariannaea fusiformis Mariannaea humicola Mariannaea imbricata Mariannaea lignicola Mariannaea macrochlamydospora Mariannaea nipponica Mariannaea pinicola Mariannaea punicea Mariannaea samuelsii Mariannaea submersa Mariannaea superimposita Mariannaea terricolaFormer species:M. catenulatae = Chaetopsina catenulataM. elegans var. punicea = Mariannaea puniceaM. pruinosa = Cordyceps pruinosa, Cordycipitaceae