Subplenodomus Gruyter et al., Stud. Mycol. 75: 23 (2012).

Saprobic or parasitic on stems and leaves of herbaceous or woody plants in terrestrial habitats.Sexual morph: undetermined. Asexual morph: Conidiomata pycnidial, globose to papillate, or with an elongate neck, solitary or aggregated, thin-walled pseudoparenchymatous, or thick-walled scleroplectenchymatous, ostiolate, unilocular. Conidiogenous cells phialidic, ampulliform to doliiform. Conidia hyaline, aseptate, ellipsoid to cylindrical (from De Gruyter et al. 2013).

Notes: The genus Subplenodomus was introduced by De Gruyter et al. (2013) to accommodate some phoma-like species in the order Pleosporales and classified in the family Leptosphaeriaceae based on morphology coupled with phylogeny. Although the genus is similar to Plenodomus in the production of thick-walled conidiomata, the conidiomata cell wall of Subplenodomus often remains pseudoparenchymatous, similar to the conidiomata wall of species of Phoma. In Plenodomus the conidiomata wall is scleroplectenchymatous (De Gruyter et al. 2013). Currently no sexual morph has been recorded for this genus.

Subplenodomus apiicola (Kleb.) Gruyter et al, S. drobnjacensis(Bubák) Gruyter et al., S. valerianae and S. violicola(Henn.) Gruyter et al., all have conidiomata with an elongated neck, similar to Plenodomus (De Gruyter et al. 2013). Conidiomata with scleroplectenchymatous walls have been only observed in S. drobnjacensis. Subplenodomus apiicolus, S. drobnjacensis and S. valerianae have relatively small conidia, up to 4.5 × 2 μm (De Gruyter & Noordeloos 1992) in congruence with many of the Plenodomus species.In contrast,S. violicola produces relatively large conidia, up to 11 × 3 μm (Boerema 1993; De Gruyter et al. 2013).

Type species: Subplenodomus violicola (P. Syd.) Gruyter et al., in Gruyter et al., Stud. Mycol. 75: 23 (2012)

            ≡ Phoma violicola P. Syd., Hedwigia 38(Beibl.): (137) (1899)

 Species

      

    Subplenodomus violicola