Arcyria affinis Rostaf., Sluzowce

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 : 9

2. Arcyria affinis Rostaf., Sluzowce monogr. 276 (1875)

Specimens examined. PERU. Ancash: Asunción, Chacas , route AN-107, km 75, 3332 m, 9º09′39”S, 77º23′05”W, 10 May 2018, woody debris, Lado 26232 (MA-Fungi 97036). Yungay, Yungay, Huascaran N.P., Llanganuco sector, Chinancocha lagoon, route AN-106, km 25,500, 3844 m, 9º04′41.6”S, 77º39′06.9”W, 19Apr 2013, branches of Polylepis sp. , Lado 22924b (MA-Fungi 95127) . Apurimac: Abancay, Tamburco, Abancay , Ampay National Sanctuary , canal dam, 3124 m, 13º35′56”S, 72º52′44”W, 20 Apr 2016, twigs and stones, Lado 24563 (MA-Fungi 95840) . Ayacucho: Huamanga, Acocro, route PE-3S, km 447, Sachabamba , 4183 m, 13º24′05”S, 74º03′41”W, 21 Apr 2017, stem of Puya raimondii, Lado 24930a (MA-Fungi 96128) .

Notes. This species has a funnel-shaped calyculus, a slightly excentric stalk, and a capillitium expanding after dehiscence. It may be confused with Arcyria incarnata (Pers. ex J.F. Gmelin) Pers. , which, in contrast, presents a flattened calyculus, non-excentric stalk, and slightly laxer capillitium sparsely expanded.