Eutypella (Nitschke) Sacc.

Dayarathne, Monika C., Wanasinghe, Dhanushka N., Devadatha, B., Abeywickrama, Pranami, G, E. B., Jones, areth, Chomnunti, Putarak, Sarma, V. V., Hyde, Kevin D., Lumyong, Saisamorn, C., Eric H. & Mckenzie, 2020, Modern taxonomic approaches to identifying diatrypaceous fungi from marine habitats, with a novel genus Halocryptovalsa Dayarathne & K. D. Hyde, gen. nov., Cryptogamie, Mycologie 20 (3), pp. 21-67 : 48

Eutypella (Nitschke) Sacc.

Atti della Società Veneziana-Trentina-Istriana di Scienze Naturali 4: 80 (1875).

NOTES

Eutypella was introduced by Saccardo (1875) with Eutypella cerviculata (Fr.) Sacc. as type species. Eutypella species can be distinguished by their erumpent ascostromata through the host bark, clustered, sulcate perithecial necks, 8-spored, clavate asci with long stalks and allantoid, hyaline or yellowish ascospores ( Glawe & Rogers 1984; Vasilyeva & Stephenson 2006). Croxall (1950) provided an account of the asexual morph of Eutypella with conidia produced from phialides. Glawe & Rogers (1982) described some asexual morphs of Eutypella producing holoblastic conidia from sympodial or percurrently proliferating conidiogenous cells, but not from phialides. Morphologically Eutypa and Eutypella species are hard to differentiate from each other. Hence, Tiffany & Gilman (1965) classified Eutypella species under the name Eutypa ( Vasilyeva & Stephenson 2009) . Eutypella species occur on a wide range of hosts, especially associated with canker diseases in Vitis vinifera ( Vasilyeva & Stephenson 2006; Trouillas et al. 2011; Luque et al. 2012). There are 248 species epithets listed in Index Fungorum (2019), but few species have sequence data. Phylogenetic analyses of Diatrypaceae have shown that Eutypella is polyphyletic ( Acero et al. 2004; Chacón et al. 2013; de Almeida et al. 2016; Shang et al. 2017; Senwanna et al. 2017). Most Eutypella strains exhibit large differences in the length of ITS1 region, in some cases with a different distribution of the tandem-repeat sequences. This was the most heterogeneous group at the sequence level within family Diatrypaceae ( Acero et al. 2004) .