Camporesiomyces puerensis M. Y. Han & Tibpromma, 2025

Camporesiomyces puerensis M. Y. Han & Tibpromma sp. nov.

Fig. 4 View Figure 4

Etymology.

The name reflects the type location, “Pu’er” City, China.

Holotype.

GMB-W 1121

Description.

Saprobic on dead branches of Coffea arabica . Sexual morph: Undetermined. Asexual morph: Hyphomycetous. Colonies on the natural substrate are superficial, solitary or clusters, hairy, yellow at apex velvety. Mycelium exposed on the surface of the substrate, with the exception of the roots. Conidiophores 52–176.5 × 2.8–5.6 μm (x ̄ = 88.4 × 4 μm, n = 30), macronematous, mononematous, solitary or forming small clusters, smooth or occasionally verruculose, cylindrical, brown, flexuous, simple, unbranched, 3–13 - septate, sometimes slightly constricted at the septa. Conidiogenous cells 6.8–26 × 2.3–4.3 μm (x ̄ = 15 × 3.6 μm, n = 20), polyblastic, terminal, cylindrical to slightly tapering, denticulate, smooth, slightly curved, pale brown. Conidia 21.7–83 × 4–9.4 μm (x ̄ = 43.3 × 6.3 μm, n = 30), solitary, acrogenous, cylindrical, or fusiform, sometimes slightly curved, 4–9 - septate, subhyaline to yellow, hyaline at both rostrate ends.

Culture characteristics.

Conidia germinating on PDA within 24 h at 28 ° C. Colony on PDA reaching 2 cm diam. after two weeks, circular or irregular, umbonate, with entire margin dark brown to black, reverse side displays predominantly black colonies with brown peripheral.

Material examined.

China • Yunnan Province, Pu’er City, Simao District (22°36'36"N, 101°0'14"E, 1189 m), on dead branches of Coffea arabica , 8 August 2024, M. Y. Han & Tibpromma, (BG 25 = GMB-W 1121 , holotype), ex-type GMBCC 1113 , other living culture GMBCC 1114 GoogleMaps .

GenBank number.

GMBCC 1113 = ITS: PQ 763356, LSU: PQ 842541, tef 1 - α: PV 388886, rpb 2: PV 388892 and GMBCC 1114 = ITS: PQ 763357, LSU: PQ 842542, tef 1 - α: PV 388887 rpb 2: PV 388893.

Notes.

In the concatenated phylogenetic analysis, our strain Camporesiomyces puerensis [ GMBCC 1113 (ex-type), and GMBCC 1114 ] formed a sister branch with C. coffeae [ GMBCC 1130 (ex-type), and GMBCC 1131 ] with 98 % ML / 1.00 PP bootstrap support (Fig. 1 View Figure 1 ), both taxa formed an independent branch under C. patagoniensis ( BBB MVB 573) with 70 % ML / 0.99 PP statistical support. Nucleotide comparisons between C. puerensis ( GMBCC 1113 ) and C. coffeae ( GMBCC 1130 ) are shown in Table 3 View Table 3 . Morphologically, C. patagoniensis exhibits the sexual morph, so the morphological comparisons with our strain were unavailable. Camporesiomyces puerensis shares a similar conidial shape with C. coffeae , but it can be distinguished by its conidial pigmentation and dimensions. The conidia of C. puerensis are subhyaline to pale green, contrasting with the subhyaline to hyaline conidia of C. coffeae (Figs 3 View Figure 3 , 4 View Figure 4 ). In addition, C. puerensis produces longer and broader conidia than C. coffeae (21.7–83 × 4–9.4 μm vs. 20–50 × 3.3–6.5 μm). Camporesiomyces puerensis also produces longer and slightly wider conidiophores than C. coffeae (52–176.5 × 2.8–5.6 μm vs. 43–97 × 2.8–4.5 μm) (Figs 3 View Figure 3 , 4 View Figure 4 ). Hence, we describe C. puerensis as a new species based on both morphology and phylogeny.