Isthmolongispora quadricellularia Matsush., Icon. microfung. Matsush. lect. (Kobe): 90 (1975).

Qiao, Min, Zheng, Hua, Guo, Ji-Shu, Castaneda-Ruiz, Rafael F., Xu, Jian-Ping, Peng, Jie, Zhang, Ke-Qin & Yu, Ze-Fen, 2021, Two new asexual genera and six new asexual species in the family Microthyriaceae (Dothideomycetes, Ascomycota) from China, MycoKeys 85, pp. 1-30 : 1

Isthmolongispora quadricellularia Matsush., Icon. microfung. Matsush. lect. (Kobe): 90 (1975).

Fig. 10

Description.

Asexual morph hyphomycetous. Colonies on CMA white, gradually turning brown, reverse white to pale brown, attaining about 2.5 cm diam. after 20 days at 25 °C. Mycelium partly superficial, partly immersed, composed of branched, septate, slender, hyaline hyphae. Conidiophores macronematous, mononematous, cylindrical, erect, straight, unbranched, aseptate, smooth, hyaline, 3.9-9.0 × 2.0-3.2 µm. Conidiogenous cells short, terminal, cylindrical, denticulate, integrated, hyaline. Conidia solitary, smooth, beaded, tapering towards both ends, 4-7-celled, generally 5-6-celled, hyaline, 44-88 × 3.5-5.0 µm. Sexual state: unknown.

Type.

China, Hainan Province, Jianfengling National Nature Reserve, on submerged leaves, Jun 2011, G.Z. Yang, YMF 1.04794, YMF 1.04011, YMF 1.04016, YMF 1.04019, preserved in a metabolically-inactive state (deep freezing) in the Conservation and Utilization of Bio-Resources in Yunnan.

Notes.

Isthmolongispora quadricellularia was first described by Matsush. in 1975 from Japan. Subsequently, this species has been isolated from leaves many times in Taiwan. However, no sequences of I. quadricellularia are available in the public database. In this study, it is the first time that I. quadricellularia has been isolated from the aquatic environment. In addition, we also submitted sequence data for this species to the public database (SSU: MT507103-105; LSU: MT507107-110; ITS: OL412746-749).

Figures

Figure 10. Isthmolongispora quadricellularia (YMF 1.04794) a conidia b conidiophores and conidiogenous cells c conidia under low power microscopy. Scale bars: 10 µm (a, b); 50 µm (c).