Physarum brunneolum (W. Phillips) 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 : 61-62

117. Physarum brunneolum (W. Phillips) Massee, Monogr. Myxogastr. 280 (1892)

Specimens examined. PERU. Ancash: Bolognesi, Mojón, route PE-3N, km 15, at junction to Chiquian , 4313 m, 10º05′33.7”S, 77º10′56.4”W, 23 Apr 2013, leaves of grasses, Lado 23101 (MA-Fungi 95264, USM). Pachapaqui, San Judas Tadeo, route PE-3N, km 35, 3828 m, 9º59′23.5”S, 77º06′40.9”W, 23 Apr 2013, bark and leaves of Polylepis sp. , Lado 23153 (MA-Fungi 95307), Lado 23154 (MA-Fungi 95308). Huasta, Chiquian, route AN-1263 towards Huallanca, km 39, 4002 m, 10º10′41”S, 76º55′52”W, 15 May 2018, leaves and woody debris of Polylepis sp. , Lado 26789 (MA-Fungi 97558). Huasta, Chiquian, route AN-1263 towards Huallanca, km 54, 1 km east of Llamac , 3241 m, 10º11′48”S, 77º01′20”W, 15 May 2018, cone of Eucalyptus globulus, Lado 26808 (MA-Fungi 97575) . Arequipa: Arequipa, Chiguata, route PE-34C, 31 km east of Chiguata , 4075 m, 16º23′18.1”S, 71º18′59.9”W, 10 Oct 2012, branch and leaves of Polylepis rugulosa, Lado 22325 (MA-Fungi 94855). Chiguata, route PE-34C, 31 km east of Chiguata , 4053 m, 16º23′35.6”S, 71º19′07.2”W, 10 Oct 2012, branches, leaves and bark of Polylepis rugulosa, Lado 22353 (MAFungi 94878), Lado 22354 (MA-Fungi 94879, USM). Caylloma, Cabanaconde, Colca valley , Pinchollo, route PE-1SE, 17 km east of Cabanaconde , 3685 m, 15º36′32.7”S, 71º52′22.3”W, 9 Oct 2012, leaves of Puya cf. densiflora, Lado 22269 (MA-Fungi 94807). San Antonio de Chuca , Imata, route PE-42J, km 7, Canal Pañe bridge, 4471 m, 15º43′02”S, 71º02′42”W, 13 Apr 2016, leaf of Festuca sp. , Lado 24254 (MA-Fungi 95598) . Ayacucho: Huamanga, Quinua, route PE-28B, km 30, Quinua , 3926 m, 13º00′19”S, 74º06′27”W, 20 Apr 2017, bryophytes, Lado 24863 (MA-Fungi 96066). Acocro, route PE-3S, km 452, towards Sachamamba Km 204, 4062 m, 13º25′25”S, 74º02′27”W, 21 Apr 2017, leaves of Festuca orthophylla , puna vegetation, Lado 24948 (MA-Fungi 96145), Lado 24952 (MA-Fungi 96148). Vinchos, route PE-28B, km 296, Casacancha, 4 km north of Arizona , 3451 m, 13º17′39”S, 74º19′29”W, 23 Apr 2017, leaves of Cortaderia jubata, Lado 25054 (MA-Fungi 96240, USM), Lado 25057 (MA-Fungi 96243, USM), Lado 25059 (MA-Fungi 96245, USM), Lado 25060 (MA-Fungi 96246, USM), leaves and branches of Eucalyptus sp. , Lado 25088 (MA-Fungi 96276), Lado 25089a (MA-Fungi 96277, USM), Lado 25091 (MA-Fungi 96280, USM), Lado 25093 (MA-Fungi 96282), Lado 25094 (MA-Fungi 96283), leaf litter, Lado 25096 (MA-Fungi 96284), leaves of grasses, Lado 25099 (MA-Fungi 96287) . Cajamarca: Cajamarca, route PE-08, km 161, Abra Gavilán , 3187 m, 7º14′53.4”S, 78º28′13.5”W, 15 Apr 2013, leaves of Cortaderia sp. , Lado 22577 (MA-Fungi 91222, USM), Lado 22579 (MA-Fungi 91223, USM), herbs, Lado 22588 (MA-Fungi 94930), leaves of Eucalyptus sp. , Lado 22589 (MA-Fungi 94931) . Huancavelica: Angaraes, Lircay, route PE-26B, km 60, Lircay , 4001 m, 12º57′45”S, 74º44′22”W, 24 Apr 2017, leaves of Orthrosanthus cf. chimboracensis, Lado 25148 (MA-Fungi 96336), Lado 25149 (MA-Fungi 96337), leaves of grasses, Lado 25161 (MA-Fungi 96347, USM). Huancavelica, Acoria, route PE-26, km 39, Ccaccasiri, 3875 m, 12º38′32”S, 74º55′06”W, 25 Apr 2017, leaves, bark and twigs of Polylepis racemosa, Lado 25224 (MA-Fungi 96408), Lado 25228b (MA-Fungi 96413), Lado 25234 (MA-Fungi 96419) . Junin: Concepción, San José de Quero, route PE-24, km 225, 6 km south of San José de Quero , 4235 m, 12º06′41”S, 75º35′01”W, 28 Apr 2017, leaves of grasses, Lado 25506 (MA-Fungi 96660). Huancayo, Huancayo, route 108, km 10, 8 km southwest of Acopalca , 3505 m, 12º00′18”S, 75º09′38”W, 27 Apr 2017, leaves of Puya sp. , Lado 25455 (MA-Fungi 96608), Lado 25456 (MA-Fungi 96609), Lado 25457 (MA-Fungi 96610, USM), Lado 25458 (MA-Fungi 96611, USM), Lado 25465 (MA-Fungi 96618). Junin, Junin, route PE-3N, km 67, Huayre, Chinchaycocha lake , 4061 m, 11º02′48”S, 75º59′52”W, 27 Apr 2017, leaves of Jarava ichu (grass), Lado 25627 (MA-Fungi 96781), Lado 25630b (MA-Fungi 96784). Tarma, La Unión, route PE-3N, km 30, Palcamayo, 4050 m, 11º20′07”S, 75º53′17”W, 30 Apr 2017, leaves of Jarava ichu (grass), Lado 25610 (MA-Fungi 96765). Yauli, Paccha, La Oroya, route PE-3N, km 6, 6 km north of La Oroya , 3706 m, 11º29′29”S, 75º56′36”W, 1 May 2017, leaves and bark Polylepis racemosa and grasses, Lado 25659 (MA-Fungi 96817), Lado 25662 (MA-Fungi 96820, USM), leaves of Cortaderia jubata, Lado 25704 (MA-Fungi 96859, USM), Lado 25708 (MA-Fungi 96862) . Lima: Huarochiri, Chicla, Casapalca , Abra Anticona, Tictcocha lake, route PE-22, km 129, 4746 m, 11º36′20.9”S, 76º11′50.2”W, 23 Sep 2012, leaves of tillering grass ( Pennisetum sp. ), Lado 21754 (MA-Fungi 94521) . Puno: Lampa, Santa Lucía, Lagunillas , Puente Cañuma , route PE-34A, km 208, 4190 m, 15º41′36.3”S, 70º48′50.3”W, 8 Oct 2012, leaves of Stipa ichu, Lado 22227 (MA-Fungi 94771), Lado 22232 (MA-Fungi 94774) .

Notes. This species stands out within the genus by the stalked sporocarps and triple peridium with a coriaceous, smooth, and shiny outer layer. Macroscopically, it is similar to some Diderma species but easily distinguishable by the calcareous capillitium.