Apiospora sichuanensis Samarak., Jian K. Liu & K.D. Hyde, in Samarakoon, Hyde, Maharachchikumbura, Stadler, Gareth Jones, Promputtha, Suwannarach, Camporesi, Bulgakov & Liu, Fungal Diversity 112: 21. 2022.

Pintos, Angel & Alvarado, Pablo, 2022, New studies on Apiospora (Amphisphaeriales, Apiosporaceae): epitypification of Sphaeria apiospora, proposal of Ap. marianiae sp. nov. and description of the asexual morph of Ap. sichuanensis, MycoKeys 92, pp. 63-78 : 63

Apiospora sichuanensis Samarak., Jian K. Liu & K.D. Hyde, in Samarakoon, Hyde, Maharachchikumbura, Stadler, Gareth Jones, Promputtha, Suwannarach, Camporesi, Bulgakov & Liu, Fungal Diversity 112: 21. 2022.

Fig. 4

Asexual morph.

Mycelium branched, septate, brown. Conidiomata on host parallel to the longitudinal axis of the stem, subepidermal, opening after the dehiscence of the host epidermis, containing a black conidial mass, measuring (400-)600-950(-1000) × (275-)300-550(-600) µm (n = 40). Conidiophore mother cells arising from the stroma, lageniform to ampuliform, pale brown, with superficial granular depositions, (5-)6-10(-16) × (3-)5-7(-8) µm (n = 30). Conidiophores basauxic, cylindrical, straight or flexuous, sometimes with a thin septum, hyaline to brown, smooth, with granular pigments, (20-)43-67(-80) µm in length × (2-)2.2-3.4(-4) µm wide (n = 50). Conidia globose, subcylindrical to ovate, polygonal or obpyriform, with a lateral germ slit over the entire length, brown, smooth, irregularly lobed, measuring (10-)23-31(-35) × (5-)9-13(-14) µm (n = 30).

Culture characteristics.

colonies on MEA 70-90 mm in diam. after 14 days at room temperature, flat, spreading, first white and cottony, later becoming gray, reverse dark gray. On PDA (200 g/L potato, 20 g/L dextrose, 20 g/L agar, pH 7.0), 80-90 mm in diam, after 14 days at room temperature, sporulating after 4-5 weeks, white cottony at first, then becoming gray with luteous patches, reverse dark gray.

Specimens examined.

Spain: Balearic Islands, Mallorca, Palma de Mallorca, Torrente de Soller , on Arundo donax , 12 December 2020, leg. Ángel Pintos, AP121220 (WU-MYC0044525) . Catalonia, Girona, Bescanó, on Arundo micrantha , 15 November 2020, leg. Marc Grañem. AP151120 .

Notes.

Ap. sichuanensis is genetically close to Ap. pseudoparenchymatica (M. Wang & L. Cai) Pintos & P. Alvarado, but the fruiting body of the former is an acervulus and that of the latter a sporodochium. In addition, the conidia of Ap. sichuanensis are 10-35 × 5-14 µm, longer and narrower than those of Ap. pseudoparenchymatica , which measure 13.5-27.0 × 12.0-23.5.

Figures

Figure 4. Apiospora sichuanensis (AP 121220) A conidiomata on host B germinated conidia C-E conidiophore mother cell giving rise to septate conidiophore with conidia F-H conidia. Scale bars 100 µm (A); 10 µm (B-H).