Neopestalotiopsis guava A. R. Amirmijani, A. Pordel, & K. Dehghani, 2025

Amirmijani, Amirreza, Pordel, Adel, Dehghani, Kowsar, Pourmoghaddam, Mohammad Javad, Masigol, Hossein & Grossart, Hans-Peter, 2025, Two new pestalotioid fungi from tropical fruits in Iran, MycoKeys 115, pp. 221-240 : 221-240

Neopestalotiopsis guava A. R. Amirmijani, A. Pordel, & K. Dehghani sp. nov.

Fig. 3

Holotype.

Iran • Sistan and Baluchestan Province, Zar Abad region , from the infected leaves of Psidium guava , 5 November 2021, leg. A. Pordel and A. R. Amirmijani (holotype: CUJ 0100 ; ex-type culture: UJFCC 2084 ).

Etymology.

Named after the host plant, Psidium guava .

Description.

Conidiomata, solitary, black, and (300 –) 500–300 (– 700) m diam., and glistening conidial masses (Fig. 3 E ). Conidiogenous cells 6–10 × 2.5–4 µm, discrete, cylindrical, hyaline, smooth, thin-walled, simple, holoblastic-annelidic, percurrently, with collarette present. Conidia 18–30 × 5–7 µm, fusoid, four-septate, smooth, and slightly constricted at the septa; the basal cell thin walled, hyaline, 5–8 µm long; three median cells cylindrical, 15–18 µm long, smooth-walled, with septa darker than the rest of cell; the second cell from the base pale brown and 4–5 µm long; the third cell medium brown and 5 µm long; the fourth cell medium brown and 5 µm long; with septum between the third and fourth cell more distinct, broader, and darker brown than the other septa; the apical cell conic with a subacute apex, thin-walled, smooth, hyaline, 4–6 µm long, and with 2–3 (– 4) apical appendages (mostly 2) arising from the apical adage; apical appendages unbranched and straight, 11–24 µm long and up to 1 µm wide (n = 100); basal appendage single, filiform, unbranched, centric, 3–5 µm long, and up to 0.5 µm wide (n = 80).

Culture characteristics.

Colony on PDA attaining 70 mm diameter after 7 d at 25 ° C, surface white and reverse pale cream (Fig. 3 A, B ), with fluffy white aerial mycelium, conidiomata scattered.

Other specimens examined.

Iran • Sistan and Baluchestan Province, Zar Abad region , from the infected leaves of Psidium guava , 5 November 2021, leg. A. Pordel and A. R. Amirmijani (cultures UJFCC 2084 and UJFCC 2086 ) .

Notes.

Neopestalotiopsis guava is phylogenetically closely related to a large clade containing N. celtidis , N. ellipsospora , N. eucalyptorum , N. foedans , N. hispanica , N. javaensis , N. maddoxii , N. megabetaspora , N. mesopotamica , N. perukae , N. rosae , N. scalabiensis , N. subepidermalis , N. suphanburiensis and N. vaccinii . However, distinct morphological differences distinguish it from all these species (Table 3 ).

Figures

Figure 3. Neopestalotiopsis guava (Holotype UJFCC 2084) A, B surface and reverse of colony after 7 days on PDA C colonies on PNA after 7 days D colonies on CLA after 7 days E conidiomata with black sporulation on PNA F conidiomata with black sporulation on CLA G, H conidiogenous cells I, J conidia with apical and basal appendage. Scale bars: 2 mm (E, F); 20 µm (G, H); 10 µm (I, J).