Macroconia gigas (J. Luo & W.Y. Zhuang) Gräfenhan & Seifert, Stud. Mycol.

Kwon, Sun Lul, Cho, Minseo & Kim, Changmu Kim and Jae-Jin, 2024, First report of seven unrecorded bambusicolous fungi in Korea, Journal of Species Research 13 (2), pp. 111-126 : 118

Macroconia gigas (J. Luo & W.Y. Zhuang) Gräfenhan & Seifert, Stud. Mycol. , 68: 102(2011)

( Figs. 3 , 8 )

MycoBank. MB 519444

On PDA, colonies circular to irregular form, margin entire, aerial mycelia dense, mycelia white. Pigment absent in medium. On CMD, colonies circular, margin erose to entire, aerial mycelia scant, mycelia white to yellow (10YR 8/8). Pigment absent in medium. Conidiophores unbranched, erect, septate, (18.5-)30-55(-70) × (3.0-)4.0- 5.0(-5.5) μm. Conidia curved, (40-)50-65 (-70) × (4.0-) 4.5-5.5 (-7.0) μm.

Distribution. Taiwan; and Republic of Korea.

Habitat. On rotten culm of bamboo and dead culm of Phyllostachys bambusoides .

Specimen examined. KOREA, Jeollanam-do, Damyang, Juknokwon , 35.3284N, 126.9855E, isolated from a dead culm of Phyllostachys bambusoides , 20 Dec 2021, Sun Lul Kwon, KUC21846 (= NIBRFGC000510470) ; KOREA, Jeollanam-do, Damyang, Juknokwon , 35.3284N, 126.9855E, isolated from a dead culm of Phyllostachys bambusoides , 20 Dec 2021, Sun Lul Kwon, KUC21848 (= NIBRFGC000510471) .

Notes. The morphology of conidia and conidiophores of our strains (KUC21846 and KUC21848) closely resembles those found in the original description, born from the sporodochia ( Luo and Zhuang, 2008). While the morphological characteristics alone do not provide sufficient evidence to definitively identify our strain as M. gigas , the combination of molecular data and ecological traits is able to identify it M. gigas .

Figures

Fig. 3. Maximum Likelihood tree for genus Macroconia with ITS dataset. Node numbers indicate bootstrap value above 70%. Blue colored names indicate the strains isolated in this study. Type strains are indicated by “T”.

Fig. 8. Morphology of Macroconia gigas(KUC21846). (A) colony on PDA; (B) colony on CMD; (C) conidia from aerial mycelia; (D) conidiophores from aerial mycelium. Scale bars: 10 μm(C); 20μm (D).