Pleosporales » Phaeosphaeriaceae

Septoriella

Septoriella Oudem., Ned. kruidk. Archf, 2 sér. 5: 52 [repr.] (1889).

Index Fungorum number: IF 9895; Facesoffungi number: FoF 00304, 46 morphological species (Species Fungorum, 2022), 22 species with molecular data.

Saprobic or pathogenic on host. Sexual morph: Unknown. Asexual morph: Conidiomata pycnidial, immersed, globose to subglobose, unilocular, dark-brown, with central, circular ostiole, wall of brown textura angularis, inner layers becoming hyaline. Conidiophores lining the inner cavity, reduced to conidiogenous cells, invested in mucus. Conidiogenous cells ampulliform to lageniform, hyaline, smooth, phialidic, annellidic, proliferating via inconspicuous percurrent proliferations near apex. Conidia fusiform to subcylindrical, apex obtuse to subobtuse, base truncate, straight or curved, euseptate, pale brown, thin-walled, smooth or minutely verruculose, bearing mucoid appendages at both ends (adapted from Crous et al. 2015).

 

Type species: Septoriella phragmitis Oudem.  

 

Notes: Septoriella is characterised by pycnidial, immersed, globose to subglobose, unilocular, dark-brown conidiomata, ampulliform to lageniform conidiogenous cells, and fusiform to subcylindrical, conidia with apex obtuse to subobtuse. Crous et al. (2014) added the new species S. oudemansii based on LSU sequence data. Crous et al. (2015) confirmed the placement of Septoriella in Phaeosphaeriaceae and synonymized Wojnowicia under Septoriella. Several authors added new species to Septoriella (Kohlmeyer and Volkmeyer Kohlmeyer 2000; Lee and Crous 2003; Taylor and Hyde 2003; Andrianova and Minter 2007; Crous et al. 2014, 2015; Thambugala et al. 2017; Marin-Felix et al. 2019; Hyde et al. 2020). Molecular data is lacking for the type species. Septoriella is a distinct genus in Phaeosphaeriaceae but fresh collections are needed for epitypification. Molecular data available for Septoriella include LSU, SSU, ITS, BTUB, RPB2 and TEF1.

 

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