Arcyria leiocarpa (Cooke) Massee, Monogr. Myxogastr.

Treviño-Zevallos, Italo, García-Cunchillos, Iván, Basanta, Diana Wrigley De & Lado, Carlos, 2023, Diversity of Myxomycetes from Peru Part III: The high Andes and the altiplano, Phytotaxa 624 (1), pp. 1-92 : 11

9. Arcyria leiocarpa (Cooke) Massee, Monogr. Myxogastr. 167 (1892)

Specimens examined. PERU. Ancash: Asunción, Chacas, Jambón, route AN-107, km 84, 3077 m, 9º09′13”S, 77º22′59”W, 10 May 2018, leaves of Cortaderia jubata, Lado 26193 (MA-Fungi 97000). Bolognesi, Huallanca, route PE-3N, km. 393, 3695 m, 9º52′33”S, 76º57′37”W, 16 May 2018, leaves of Cortaderia jubata, Lado 26874 (MA-Fungi 97636). Huaraz, Independencia, Piruruyoc, route AN-14, km 119, 4015 m, 9º33′51”S, 77º35′44”W, 9 May 2018, cardboard, Lado 26116 (MA-Fungi 96921). Recuay, Catac, route AN-110, km 22, 4154 m, 9º43′21”S, 77º19′18”W, 14 May 2018, leaves of Polylepis sp. , Lado 26675 (MA-Fungi 97451) . Huancavelica: Hauytara, Pilpichaca, route PE-28A, km 208, 10 km west of Licapa , 4020 m, 13º24′18”S, 74º53′54”W, 23 Apr 2017, leaves of Puya raimondii, Lado 25112 (MA-Fungi 96300). Huaytara, Huaytara, route PE-28A, km 120, Jatunhuatas bridge, 3119 m, 13º36′27”S, 75º19′38”W, 19 Apr 2017, leaf of Puya sp. , Lado 24788a (MA-Fungi 95991). Pilpichaca, route PE-28A, km 170, Chaupi, 4347 m, 13º27′43”S, 75º01′59”W, 19 Apr 2017, branch of Baccharis tricuneata, Lado 24795a (MA-Fungi 96001), Lado 24799a (MA-Fungi 96005), leaves of Festuca sp. , Lado 24815 (MA-Fungi 96022) . Junin: Huancayo, El Tambo, route 108, km 17, 1 km southwest of Acopalca, 3790 m, 11º59′38”S, 75º06′49”W, 27 Apr 2017, leaves of Puya sp. , Lado 25365 (MA-Fungi 96528), Lado 25379 (MA-Fungi 96541, USM) . Pasco: Simón Bolivar, Pacoyan, laguna Ruquicocha, route PA-100, km 33, 4444 m, 10º40′21”S, 76º26′50”W, 19 May 2018, stems and leaves of Perezia multiflora, Lado 27077 (MA-Fungi 97829) .

Notes. Lado & Pando (1997) and Poulain et al. (2011) considered this species to be in the genus Hemitrichia , while we retain it in Arcyria —as Martin & Alexopoulos (1969) already stated— since molecular studies confirmed its phylogenetic position within Arcyria ( García-Cunchillos et al. 2022) . The morphology of this species is variable, yet all specimens have spore-like bodies inside the stalk, spores with prominent warts, and capillitium ornamented with spirals.