Conlarium baiseense L.Xie, Y.L.Chen & B.Liu sp. nov. Figure 2

Etymology .

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

Type.

CHINA. Guangxi: Baise City, Tiandong County, Silin Town. 23°30'38"N, 107°20'1"E, 109 m alt., in sugarcane rhizosphere, 11 Sep 2015, Y.L. Chen and L.P. Qin, TD2 (HMAS 247298, holotype) deposited in Microbiology Research Institute, Guangxi Academy of Agricultural Science.

Description.

Colony reached 14 mm diameter on medium after 2 weeks at 28 °C, grey-white to grey, circular, flat growth, less aerial hyphae, regular edge of colony. Hyphae light yellow-green to light yellow-brown, septate. Conidiophores yellow-brown, mostly stubby, 0-2-branched, 0-8-septate, straight or flexuous, 3-12 × 2-6 μm (7 ± 2 × 4 ± 1 μm, n = 51). Conidiogenous cells determinate, doliiform, yellowbrown to brown, 3-8 × 5-12 μm (6 ± 1 × 7 ± 2 μm, n = 51). Muriform conidia yellow-brown to brown, irregularly globose or subglobose, smooth, constricted at the separation, 0-1 transversely septa, 0-4 longitudinal septa, 15-25 × 12-19 μm (18 ± 2 × 15 ± 2 μm, n = 26). Columnar conidia, yellow-brown to brown, 2-5 transversely septa, no longitudinal septa, 21-35 × 7-12 μm (28 ± 5 × 10 ± 1 μm, n = 23). Sexual morph: undetermined.

Habitat and distribution.

In sugarcane rhizosphere soil of southern China.

Other specimens examined.

CHINA. Guangxi: Baise City, Tiandong County, Silin Town. 23°30'3.68"N, 107°20'1"E, 112.5 m alt., in sugarcane rhizosphere, 11 Sep. 2015, Y.L. Chen and L.P. Qin, TD17 (HMAS 247986).

Notes.

Conlarium baiseense is similar to the asexual morph of C. aquaticum, C. duplumascospora, C. nanningense, and C. thailandense . They all have monoblastic, holoblastic, conidiogenous cells and mostly irregular, brown, clathrate, muriform conidia (Liu et al. 2012). However, C. baiseense can be easily distinguished from C. aquaticum, C. duplumascospora, C. nanningense, and C. thailandense by its conidial septa number (6-12-transverse septa, 4-10-longitudinal septa in C. aquaticum; 2-4-transversely septate, 1-3-longitudinally septate in C. duplumascospora; 0-1 transversely septa, 0-4 longitudinal septa in C. nanningense; 4-8-transverse septa, 4-6-longitudinal septa in C. thailandense vs 0-2 transversely septa, 0-8 longitudinal septa in C. baiseense) 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, 11-21 × 9-21 μm in C. nanningense vs 21 × 35-7 × 12 μm in C. baiseense) (Liu et al 2012; Zhang et al. 2017; Phookamsak et al. 2019). Phylogenetic reconstructions based on SSU+ITS+LSU+RBP2 sequences shows that authentic C. baiseense form independent monophyletic groups, well separated from C. aquaticum, C. duplumascospora, C. nanningense, and C. thailandense, respectively. A comparison of ITS sequence shows that C. baiseense differs from C. aquaticum, C. duplumascospora, C. nanningense, and C. thailandense in 26 bp, 24 bp, 18 bp, and 24 bp, respectively. According to the guidlines in Jeewon and Hyde (2016), we introduce C. nanningense as a new species.