Beltraniella jianfengensis W. W. Liu, C. Z. Yin, Z. X. Zhang & X. G. Zhang

Beltraniella jianfengensis W. W. Liu, C. Z. Yin, Z. X. Zhang & X. G. Zhang, MycoKeys 116: 132 (2025) Fig. 6 Description. Sexual morph: Undetermined. Asexual morph: Setae numerous, erect, straight or flexuous, unbranched, single or in small groups, thick-walled, verrucose, dark brown, 102–165 μm long, 3.9–9.3 μm wide at the base, tapering to a pointed apex, or arising from a dark brown, swollen, radially lobed basal cell, 8.9–15.6 μm in diameter. Imperfect setae single, flexuous, septate, verrucose, thick-walled, pale brown, up to 115 μm long, swollen at the base. Conidiophores macronematous, short, simple or branched, septate, verrucose, swollen at the base, subhyaline to pale brown, thin-walled, arising from basal cells of setae, 26–87 μm long, 5.9–9.7 μm wide. Conidiogenous cells polyblastic, integrated, determinate, terminal, cylindrical, oblong, hyaline to subhyaline, verrucose, 6.3–33.3 µm (av. = 16.9 μm, n = 16) long, 4.2–6.9 µm (av. = 5.8 μm, n = 16) wide at the base. Separating cells fusiform, thin-walled, smooth, hyaline to subhyaline, 1 - denticulate at each end, 11–14 µm long, 3.1–4.7 µm wide in the broadest part. Conidia arise directly from conidiogenous cells or from separating cells, aggregated, acrogenous, simple, dry, straight, smooth, thin-walled, turbinate to obpyriform, rostrate to pointed at proximal end, rounded at distal end, hyaline, 10.82–32.82 µm (av. = 25.2 μm, n = 26) long, 4.1–8.3 µm (av. = 7.1 μm, n = 26) wide in the broadest part. Culture characteristics. Colonies on PDA at 25 ° C in darkness, occupying an entire 90 mm Petri dish in 14 d. Surface white, prominent. Reverse pale yellow in the middle with the edges being medium white. Materials examined. China • Hainan Province, Lingshui Li Autonomous County, Diaoluo Mountain National Forest Park, on decaying leaves, 9 April 2023, Q. Y. Liu, HSAUP 2905-1 A, living cultures SAUCC 2905-1 A; Ibid., HSAUP 2905-1 B, living culture SAUCC 2905-1 B. GeneBank numbers. SAUCC 2905-1 A: ITS = PV 577714, LSU = PV 570358, RPB 2 = PV 578285, TEF 1 - α = PV 578289, TUB 2 = PV 578287; SAUCC 2905-1 B: ITS = PV 577715, LSU = PV 570359, RPB 2 = PV 578286, TEF 1 - α = PV 578290, TUB 2 = PV 578288. Notes. In the phylogenetic analysis, our isolates (SAUCC 2905-1 A and SAUCC 2905-1 B) clustered with Beltraniella brevis (MFLU 19-2253) and Be. jianfengensis (SAUCC 639001 and SAUCC 639002) with high support (ML = 80 %, BI = 0.9). Our isolates (SAUCC 2905-1 A and SAUCC 2905-1 B) and Be. jianfengensis (SAUCC 639001, ex-type strain) were similar in ITS (2 / 567) and LSU (1 / 781). Morphologically, our isolates (SAUCC 2905-1 A and SAUCC 2905-1 B) are similar to Be. jianfengensis (SAUCC 639001) by separating cells (SAUCC 2905-1 A and SAUCC 2905-1 B: 11–14 × 3.1–4.7 µm; SAUCC 639001: 10.7–14.7 × 2.8–5.5 µm) and conidia (SAUCC 2905-1 A and SAUCC 2905-1 B: 10.82–32.82 × 4.1–8.3 µm; SAUCC 639001: 17.1–23.6 × 3.6–9.5 µm), and conidia lacking a hyaline transverse band. Be. jianfengensis (SAUCC 639001 and SAUCC 639002) was originally discovered on decaying leaves in Jianfengling National Forest Park, Hainan Province, China (Liu et al. 2025). Based on morphological characteristics and phylogenetic analysis, we report our isolates (SAUCC 2905-1 A and SAUCC 2905-1 B) as Be. jianfengensis from decaying leaves in Diaoluo Mountain National Forest Park, Hainan Province, China.