Conlarium nanningense L.Xie, Y.L.Chen & B.Liu sp. nov. Figure 1

Etymology.

The species is named for Nanning City, the type locality.

Type.

CHINA. Guangxi: Nanning City, Datang Town. 22°23'25"N, 108°23'12"E, 144 m alt., in sugarcane rhizosphere, 11 Feb. 2011, L. Xie, M1 (HMAS 247075 holotype) deposited in Microbiology Research Institute, Guangxi Academy of Agricultural Science.

Description.

Colony reached 22 mm diameter on PDA medium after 2 weeks, grey-white to grey-brown, nearly circular, flat growth, less aerial hyphae. Hyphae grey-brown, verruculose, septate. Conidiophores 1-15 × 1-5 μm (6 ± 3 × 4 ± 1 µm, n = 54), stubby, unbranched, septate or aseptate, straight or flexuous, hyaline, becoming brown with age. Conidiogenous cells determinate, doliiform, cylindrical, 4-13 × 5-10 µm (6 ± 2 × 7 ± 2 µm, n = 22). Conidia brown, muriform, irregularly globose or subglobose, smooth, constricted at the septa, 0-1 transversely septa, 0-4 longitudinal septa, 11-21 × 9-21 µm (15 ± 3 × 13 ± 3 µm, n = 50). Chlamydospores subglobose or irregular, 4-12 µm (7 ± 2 µm, n = 67). Sexual morph: undetermined.

Habitat and distribution.

In sugarcane rhizosphere soil of southern China.

Other specimens examined.

CHINA. Guangxi: Nanning City, Datang Town. 22°29'54.51"N, 108°24'3.06"E, 102 m alt., in sugarcane rhizosphere, 11 Feb. 2011, L. Xie, M8 (HMAS 247985).

Notes.

Conlarium nanningense is similar to the asexual morph of C. aquaticum, C. duplumascospora, and C. thailandense . They all have monoblastic, holoblastic conidiogenous cells and mostly irregular, brown, clathrate, muriform conidia (Liu et al. 2012). However, C. nanningense can be easily distinguished from C. aquaticum, C. duplumascospora, and C. thailandense by the number of conidial septa (2-4-transversely septate, 1-3-longitudinally septate in C. duplumascospora; 6-12-transverse septa, 4-10-longitudinal septa in C. aquaticum; 4-8-transverse septa, 4-6-longitudinal septa in C. thailandense vs 0-1 transversely septa, 0-4 longitudinal septa in C. nanningense) and conidial size (15.5-35 × 11-26.5 μm in C. duplumascosporum, 45-70 × 20-57 μm in C. aquaticum, 25-45 × 17-33 μm in C. thailandense and 11-21 × 9-21 μm in C. nanningense) (Liu et al 2012; Zhang et al. 2017; Phookamsak et al. 2019). Phylogenetic reconstructions based on SSU+ITS+LSU+RBP2 sequences show authentic C. nanningense is sister to C. duplumascospora . A comparison of ITS pairwise indicates that C. nanningense differs from C. aquaticum, C. duplumascospora, and C. thailandense in 21 bp, 12 bp, and 18 bp, respectively. Thus, following the guidelines of Jeewon and Hyde (2016), this is a new species.