Periconia shannanensis T. Cai, S. C. He, & Q. Zhao, 2024

Periconia shannanensis T. Cai, S. C. He, & Q. Zhao sp. nov. Fig. 2 View FIGURE

Chinese Name: Ɯ南DZ团ª

Index Fungorum number: IF902314; Facesoffungi number: FoF 16082

Etymology: Referring to the collecting site of the type specimen.

Holotype: HKAS 134945 View Materials

Saprobic on a dead Artemisia Linn. Asexual morph: Hyphomycetous. Colonies on the substrate, effuse, brown to dark brown, hairy. Conidiophores macronematous, mononematous, erect, simple, straight or flexuous, branched at the apex, thick-walled, smooth-walled, septate, brown to dark brown, 664–844 × 18.5–26.5 μm (x = 754 × 22.5 μm, n = 20). Conidiogenous cells polyblastic, integrated, terminal, subglobose, smooth to verruculose, brown, thinwalled. Conidia catenate, acrogenous, globose, simple, verruculose, guttulate, thick-walled, rough-walled, aseptate, pale brown when young, rather dark brown when mature, 16–18.5 × 16–19 μm (x = 17.3 × 17.6 μm, n = 30). Sexual morph: Not observed.

Culture characteristics: Conidia germinating within 12 h on PDA at 25 °C, reaching 2.5–3.0 cm after 10 days incubation, both above and reverse colony with white edge, center with pale grey, entire edge, flat, surface smooth, mycelia dense, no pigment.

Material examined: China, Xizang, Shannan City , Longzi County (28° 69′ N, 93° 29′ E, 3650m), on dead Artemisia Linn , 4 August 2023, collected by Shu-Cheng He, WZY32 ( HKAS 134945 View Materials , holotype) ; ex-type living cultures, KUNCC24-17784 . ibid. WZY25, ( HKAS 134943 View Materials , paratype) ; living cultures, KUNCC24-17785 . WZY26, ( HKAS 134944 View Materials , paratype) ; living cultures, KUNCC24-17786 .

Notes: Three specimens of Periconia shannanensis formed a monophyletic clade within the genus Periconia with 100 ML /1.00 BIPP statistical support ( Figure 1 View FIGURE ). Periconia shannanensis and P. artemisiae cluster together to form a sister clade with high support (99 ML /1.00 BIPP), and the nucleotide base differences between P. shannanensis and P. artemisiae ( KUMCC 20-0265) are 11/508 bp of ITS (2.16%), 2/811 bp of LSU (0.25%), 3/938 bp of SSU (0.32%) and 23/873 bp of tef1 (2.63%). P. shannanensis has similar morphological features to P. artemisiae . ( Yang et al. 2022). Both them occur terrestrial environments saprophytically on Artemisia Linn ( Asteraceae ) plants from China. However, compared with P. artemisiae , P. shannanensis has longer and wider conidiophores (754 × 22.5 μm vs. 312 × 16 μm) and larger conidia (17.3 × 17.6 μm vs. 6.7 × 4.3 µm).