Neostagonospora Quaedvlieg et al., Stud. Mycol. 75: 364 (2013).
Pathogenic on Carex acutiformis Ehrh and Elegia cuspidate Mast., or soil borne. Sexual state: Unknown. Asexual state: Conidiomata pycnidial, scattered, semiimmersed to superficial, uniloculate, globose, glabrous, producing pale luteous to creamy conidial mass on host surface. Conidiomata walls thin, composed of 2–3 layers of pale brown cells, arranged in a textura angularis. Conidiophores reduced to conidiogenous cells . Conidiogenous cells phialidic, integrated, ampulliform to doliiform, hyaline, smooth-walled, lining the inner cavity, with prominent periclinal thickening. Conidia narrow fusoid-ellipsoidal to subcylindrical, apically subobtuse to rounded, truncate at the base, hyaline, septate, initially nonconstricted at the septum, becoming constricted at the septa when mature, smooth walled, with granules (from Quaedvlieg et al. 2013).
Type species: Neostagonospora caricis Quaedvlieg et al.,
Stud. Mycol. 75: 364 (2013).
Phylogenetic study: Quaedvlieg et al. (2013).
Notes: The asexual genus Neostagonospora was introduced by Quaedvlieg et al. (2013) to accommodate the
stagonospora-like species in Phaeosphaeriaceae. Two species were placed in this genus; Neostagonospora caricis and Ne. elegiae Quaedvlieg et al. with Ne. caricis being the type species. Neostagonospora is similar to Stagonospora but differs in its conidiogenous cells. Neostagonospora has determinate phialidic conidiogenous cells, with prominent periclinal thickening while Stagonospora has percurrent proliferation of conidiogenous cells. Based on phylogenetic analysis, Neostagonospora is related to Phaeosphaeriaceae, while the type species of Stagonospora, St. paludosa clusters in Massarinaceae (Quaedvlieg et al. 2013). In the phylogeny, Neostagonospora forms a sister clade with Parastagonospora for which no sexual state is known. Phaeosphaeria sensu lato taxa are polyphyletic and therefore, it is likely that Neostagonospora may be an asexual state of phaeosphaeria-like species.