Crystallicutis albomarginata Z. R. Gu & C. L. Zhao, 2025

Gu, Zirui, Zhou, Chunqin, Zhang, Jianling, Liu, Yu, Deng, Qiaohua, Yang, Rongcong, Yang, Shunqiang & Zhao, Changlin, 2025, Taxonomy and phylogeny of Irpicaceae and Meruliaceae (Polyporales, Basidiomycota) with descriptions of four new species from southwestern China, MycoKeys 119, pp. 197-234 : 197-234

publication ID

https://doi.org/10.3897/mycokeys.119.157018

DOI

https://doi.org/10.5281/zenodo.15807308

persistent identifier

https://treatment.plazi.org/id/A3E60E9C-C47F-5A36-8CCC-BB1B4DF86429

treatment provided by

MycoKeys by Pensoft

scientific name

Crystallicutis albomarginata Z. R. Gu & C. L. Zhao
status

sp. nov.

Crystallicutis albomarginata Z. R. Gu & C. L. Zhao sp. nov.

Figs 5 View Figure 5 , 6 View Figure 6 , 7 View Figure 7

Diagnosis.

Differs from other Crystallicutis species by its slightly pink to orange basidiomata when dry, a monomitic hyphal system with simple septa, and narrowly ellipsoid basidiospores measuring 3.7–4.4 × 1.9–2.8 µm.

Holotype.

China • Yunnan Province, Zhaotong, Wumengshan National Nature Reserve , GPS coordinates: 22°77'N, 104°29'E, altitude 1800 m asl., on the fallen angiosperm branch, leg. C. L. Zhao, 25 August 2023, CLZhao 31506, GenBank: ITS = PV 470539 , nLSU = PV 474184 ( SWFC).

Etymology.

Albomarginata (Latin or Greek origin): refers to the white margin of the basidiomata.

Description.

Basidiomata. Annual, resupinate, adnate, membranaceous, without odor or taste when fresh, up to 10 cm long, 2.5 cm wide, and 200 μm thick at center. Hymenial surface smooth, cream to pale pink when fresh, turning to slightly pink to orange upon drying. Sterile margin narrow, cream to pale pink, up to 1 mm.

Hyphal system. Monomitic; generative hyphae with simple septa, colorless, thin- to slightly thick-walled, rarely branched, interwoven, 2.1–3 µm in diameter, IKI –, CB –; tissues unchanged in KOH. Hymenium. Cystidia fusiform, colorless, thin-walled, smooth, 12.5–27 × 3.5–6 µm. Basidia clavate, thin-walled, smooth, slightly flexuous, with four sterigmata and a simple septum at the base, 12.1–19.4 × 3.8–6 µm; basidioles in shape similar to basidia, but slightly smaller; subhymenial hyphae covered with smaller irregularly shaped colorless crystals. Basidiospores. Basidiospores narrowly ellipsoid, colorless, thin-walled, smooth, with 1-2 guttules, IKI –, CB –, (3.5 –) 3.7–4.4 (– 4.6) × (1.6 –) 1.9–2.8 µm, L = 4.06 µm, W = 2.33 µm, Q = 1.58–1.95 (n = 60 / 2).

Additional specimen examined (paratype).

China • Yunnan Province, Zhaotong, Wumengshan National Nature Reserve , GPS coordinates: 22°77'N, 104°29'E, altitude 1800 m asl., on the fallen angiosperm branch, leg. C. L. Zhao, 25 August 2023, CLZhao 31409, GenBank: ITS = PV 470538 , nLSU = PV 474183 ( SWFC) .

SWFC

Southwest Forestry College