Gomphus bijiensis Wang, Guo & Liu, 2025

Wang, Xianyi, Guo, Zhongyao, Tao, Jiawei, Guo, Yunhan, Wang, Guoyu, Xu, Guangyin, Li, Qirui & Liu, Hongmei, 2025, Phylogeny and comparative analysis of mitochondrial genomes of Gomphus spp. Pers. (Basidiomycota, Agaricomycetes), with descriptions of G. matijun J. W. Liu & F. Q. Yu and G. bijiensis sp. nov., MycoKeys 124, pp. 357-381 : 357-381

Gomphus bijiensis Wang, Guo & Liu sp. nov.

Fig. 2 a – c

Diagnosis.

Gomphus bijiensis is phylogenetically distinct from G. indicus K. Das, Hembrom & R. Kujur and G. matijun (bootstrap support = 100) and differs morphologically in having (1) smaller basidiocarps ( 6–11 cm vs. up to 15 cm in G. indicus ), (2) a darker violet to purplish-brown pileus (6 F 6–7 E 8 vs. lighter brownish-orange in G. matijun ), and (3) smaller, more prominently warted basidiospores [(7.5 –) 8.0–9.8 (– 10.5) × (4.5 –) 5.0–6.0 (– 6.5) μm vs. larger and less ornamented spores in G. indicus ].

Etymology.

The epithet bijiensis refers to the type location, Guizhou Province, PR of China.

Holotype.

PR of China • Guizhou Province, Bijie City , collected on soil under a Pinus forest, August 2023, coll. MY 1010 (Herbarium of Guizhou Medical University) .

Description.

Basidiocarps are robust, funnel-shaped to irregularly lobed, pileus 6–11 cm diam., violet to purplish-brown (Munsell: 6 F 6–7 E 8), surface rugulose to wrinkled. Hymenophore with blunt, forked folds, lacking lamellae, concolorous with pileus but paler at maturity. Stipe 4–9 × 1.5–2.5 cm, solid, tapering toward base, surface whitish to cream (4 A 2–4 A 3) with brown fibrils. Flesh white, unchanging. Basidiospores (7.5 –) 8.0–9.8 (– 10.5) × (4.5 –) 5.0–6.0 (– 6.5) μm, Q = 1.45–1.72, Qm = 1.58 ± 0.06 (n = 50), ellipsoid to broadly ellipsoid, hyaline, thick-walled, with irregular warted ornamentation. Basidia 35–42 × 7–9 μm, clavate, 4 - spored, with basal clamp connections. Hyphae in trama hyaline, 3–6 μm wide, with irregularly thickened walls, clamp connections present.

Habit, habitat, and distribution.

Growing gregariously on soil in mixed Pinus forests. Known only from the type locality in Bijie City, Guizhou Province, PR of China (approx. 27 ° 05 ' 10 " N, 103 ° 48 ' 50 " E).

Notes.

Gomphus bijiensis is phylogenetically closely related to G. indicus and G. matijun , but both molecular and morphological data support its recognition as a distinct species. It differs from G. indicus in its smaller basidiocarps, darker pileus coloration, and more prominently ornamented spores, while it differs from G. matijun in pileus colour (deep violet to purplish-brown vs. brownish-orange), narrower stipe, and smaller spore size. The combination of these diagnostic traits, along with strong bootstrap support in phylogenetic analysis, justifies recognition of G. bijiensis as a novel species.

Figures

Figure 2. Gomphus bijiensis, a. Fresh samples; b. SEM images of basidiospores showing warted ornamentation; c. SEM images of mycelial structure.