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 (1974) 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 (Samson 1974; Samson and Bigg 1988; Samuels and Seifert 1991). The sexual morph of ''Mariannaea'' has been linked to genus ''Nectria'' (Samuels and Seifert 1991), and genus ''Cosmospora'' (Gräfenhan et al. 2011). 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. (2011) retained ''Mariannaea'' as a distinct genus in Nectriaceae. Five new species were fur ...
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