Lentimurispora arundinis Y. R. Xiong, L. Y. Zhou & M. M. Zhang sp. nov.

Fig. 4

Etymology.

Species epithet refers to the host genus name “ Arundo ” from which the holotype was isolated.

Description.

Saprobic on dead petiole of Arundo donax. Asexual morph: Hyphomycetous. Colonies on substrate, superficial, black, scattered, gregarious, punctiform. Mycelium immersed in the substratum, composed of branched, septate, hyaline hyphae. Conidiophores micronematous, hyaline, most reduced to conidiogenous cells. Conidiogenous cells 17–38 × 7–12 μm (x ̄ = 22.3 × 9.6 μm, n = 20), integrated, terminal, hyaline, smooth, wedge-shaped, clavate, truncate at apex after conidial secession. Conidia 11–15 × 17–21 μm (x ̄ = 13.2 × 19.2 μm, n = 30), acrogenous, thick-walled, smooth, multiseptate, cushion-like, muriform, slightly constricted at the septa, median with black ellipsoid area, most 3 - layer subhyaline or pale brown peripheral cells; with a big attachment cell, hyaline, thick-walled, inverted vase-like, clavate, narrowed towards the base, truncate at apex. Sexual morph: Undetermined.

Culture characteristics.

Colonies on PDA fast growing, after two weeks reaching 3–4 cm diam. at 25 ° C, white at the edge, gray in the middle, entire edge, curled, umbonate.

Known distribution.

China.

Material examined.

China • Jiangxi Province, Jiujiang City, on dead petiole of Arundo donax, 14 Nov 2025, Y. R. Xiong and L. Y. Zhou, XG 518 (HKAS 155057, holotype); ex-type, KUNCC 25-21579, other living culture KUNCC 25-21580.

Notes.

Two isolates from this study formed a separate lineage and clustered with Lentimurispora urniformis (MFLUCC 18-0497) in the phylogenetic tree with 99 % ML and 1.00 BIPP support (Fig. 3). The nucleotide differences excluding gaps between L. arundinis (KUNCC 25-21579) and L. urniformis (MFLUCC 18-0497) were as follows: LSU = 1.54 % (14 / 911 bp), SSU = 0.49 % (5 / 1027 bp), and tef 1 - α = 5.47 % (50 / 914 bp). Morphologically, Lentimurispora arundinis is characterized by conidia with a black ellipsoid area in the median region and mostly three-layered subhyaline or pale brown peripheral cells. However, L. urniformis differs from L. arundinis by its lenticular conidia with dark brown central cells and subhyaline to pale brown peripheral cells (Liu et al. 2018). Based on the phylogenetic placement and morphological variations, L. arundinis is introduced as a new species.