Conlarium sacchari L.Xie, Y.L.Chen & B.Liu

Xie, Ling, Chen, Yan-Lu, Long, Yan-Yan, Zhang, Yan, Liao, Shi-Tong, Liu, Bin, Qin, Li-Ping, Nong, Qian & Zhang, Wen-Long, 2019, Three new species of Conlarium from sugarcane rhizosphere in southern China, MycoKeys 56, pp. 1-11 : 6-7

Conlarium sacchari L.Xie, Y.L.Chen & B.Liu sp. nov. Figure 3

Etymology.

The epithet " sacchari " refers to the habitat where first collected.

Type.

CHINA. Guangxi: Chongzuo City, Daxin County, Lanxu Village . 22°44'46"N, 107°15'15"E, 241 m alt., in sugarcane rhizosphere, 8 July 2015, Y.L. Chen and L.P. Qin, DX4 ( HMAS 247299 , holotype) deposited in Microbiology Research Institute, Guangxi Academy of Agricultural Science.

Description.

Colony reached 15 mm diameter on medium after 2 weeks at 28 °C, greywhite to grey, circular, flat growth, less aerial hyphae, regular edge of colony. Hyphae light yellow to yellow-brown, septate. Conidiophores yellow-brown, mostly stubby, 0-2-branched, 0-6-septate, straight or flexuous, 3 –30×2– 4 μm (10 ± 7 × 3 ± 1 μm, n = 43). Conidiogenous cells determinate, doliiform, yellow-brown to brown, 4-12 × 2-7 μm (7 ± 2 × 5 ± 1 μm, n = 52). Conidia yellow-brown to brown, muriform, irregularly globose or subglobose, smooth, constricted at the separation, 0-1 transversely septa, 0-4 longitudinal septa, 14 –19×13– 22 μm (17 ± 3 × 16 ± 2 μm, n = 20). Sexual morph: undetermined.

Habitat and distribution.

In sugarcane rhizosphere soil of southern China.

Other specimens examined.

CHINA. Guangxi: Nanning City, Long'an County, Natong Town . 23°4'48"N, 107°47'31"E, 128 m alt., in sugarcane rhizosphere, 11 Sep. 2015, Y.L. Chen and L.P. Qin, LA3 ( HMAS 247300 ). Nanning City, Suxu town . 23°34'42"N, 108°8'30"E, 325 m alt., in sugarcane rhizosphere, 11 Feb. 2011, L. Xie, NN1 ( HMAS 247301 ).

Notes.

Conlarium sacchari is similar to the asexual morph of C. aquaticum , C. baiseense , 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, Conlarium sacchari can be easily distinguished from C. aquaticum , C. duplumascospora , C. nanningense , and C. thailandense by its less number of conidial septa (6-12-transverse septa, 4-10-longitudinal septa in C. aquaticum ; 2-5 transversely septa, 0-2 longitudinal septa in C. baiseense , 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. 0-1 transversely septa, 0-3 longitudinal septa in C. sacchari ) ( 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. sacchari formed independent monophyletic groups which are well separated from C. aquaticum , C. baiseense , C. duplumascospora , C. nanningense , and C. thailandense , respectively. A comparion of ITS sequence shows that C. sacchari differ from C. aquaticum , C. baiseense , C. duplumascospora , C. nanningense , and C. thailandense in 21 bp, 24 bp, 21 bp, 18 bp, and 16 bp, resectively. Therefore, we introduce C. sacchari as a new species, following the guidelines of Jeewon and Hyde (2016).