Cantonopsathyra Kun L. Yang, Jia Y. Lin, Zhen-Chao Liu & Zhu L. Yang, 2025

Yang, Kun L., Lin, Jia Y., Li, Guang-Mei & Yang, Zhu L., 2025, Introducing one new genus and two new species of Psathyrellaceae (Basidiomycota, Agaricales), with notes on Candolleomyces and Ephemerocybe, Phytotaxa 702 (1), pp. 1-28 : 11

(1) Cantonopsathyra Kun L. Yang, Jia Y. Lin, Zhen-Chao Liu & Zhu L. Yang , gen. nov.

Registration identifier:— FN572405

Etymology:— Canton is an old name of Guangzhou, refers to the type locality.

Type species:— Cantonopsathyra serendipita Kun L. Yang, Jia Y. Lin, Zhen-Chao Liu & Zhu L. Yang (see below)

Diagnosis:— Similar to Iugisporipsathyra and Rachipsathyra , but differing from them by a feature combination of usually not capitate cheilocystidia, smoother ornamentation on basidiospores, and the rare presence of pleurocystidia and clamp connections.

Description:— Basidiomata psathyrelloid, small to medium-sized, fragile, not deliquescent nor collapsing. Pileus conical, convex to plano-concave, slightly rugose, hygrophanous, whitish, orangish, reddish to brownish; veil absent; margin not or shortly striate. Lamellae adnexed to emarginate, crowded, whitish, yellowish, brownish to purplish, interspersed with abundant lamellulae. Stipe subcylindrical, hollow, distinctly striate, whitish to brownish, with fibrous squamules, without an annulus.

Basidiospores broadly fusiform, thick-walled or slightly thick-walled, brownish, with an irregularly wrinkled surface, a small apiculus, and a central germ pore. Basidia clavate, four-spored. Lamella trama regular. Cheilocystidia clavate. Pleurocystidia absent or rare, clavate. Pileipellis hymeniform. Clamp connections rare.

Habits and distribution:— Gregarious, on soil, in subtropical forests. Currently known from China and Sri Lanka.

Notes:— This genus currently comprises three species, namely Cantonopsathyra serendipita, Cn. malayana and Cn. trechispora (see below).