Ctenomyces peltricolor Y.F. Han, Z.Q. Liang & Z.Y. Zhang

Zhang, Zhi-Yuan, Han, Yan-Feng, Chen, Wan-Hao & Liang, Zong-Qi, 2019, Phylogeny and taxonomy of three new Ctenomyces (Arthrodermataceae, Onygenales) species from China, MycoKeys 47, pp. 1-16 : 1

Ctenomyces peltricolor Y.F. Han, Z.Q. Liang & Z.Y. Zhang sp. nov. Figure 5

Holotype.

CHINA, Gansu Province, on soil, Nov. 2017, Z.Y. Zhang (HMAS 255387, holotype, ex-type culture CGMCC 3.19229).

Paratypes.

CHINA, Gansu Province, on soil, Nov. 2017, Z.Y. Zhang, dried cultures HMAS 255439 and HMAS 255440, isolates CGMCC 3.19230 (GZUIFR-C03011) and CGMCC 3.19231 (GZUIFR-C03012).

Etymology.

Referring to the pewter colony.

Description.

Aerial hyphae hyaline, smooth, septate, branched, 1.2-3.3 μm wide; racquet hyphae absent. Terminal and lateral conidia borne on hyphae, short protrusions, side branches or an ampulliform swelling. Conidia solitary, usually only 1 borne on ampulliform swellings; subglobose or globose; smooth- or rough-walled, verrucose, spinate, 8.3-20.2 μm (x‒ = 15.5 μm, n=15). Intercalary conidia absent.

Culture characteristics.

Colonies on PDA growing in the dark reaching 12 mm diam. in 14 d at 25 °C, pewter at the centre, white in the margin; powdery to floccose at the centre, fluffy in the margin; appearing a circle of annulation; rounded, margin regular. Reverse brown at the centre, yellowish in the margin.

Notes.

Ctenomyces peltricolor is distinct from other species in its single conidia borne on ampulliform swellings and colony colour. Phylogenetically, the ITS-based phylogenetic analysis (Figure 1) showed that three isolates of C. peltricolor cluster in a single clade (BPP 1, BS 100%), consistent with the results of multigene phylogenetic analysis (BPP 1, BS 100%) (Figure 2). Therefore, based on both morphological and phylogenetic evidence, C. peltricolor was identified as a new species of Ctenomyces .