Perichaena depressa Lib., Pl.
Creators: name: Treviño-Zevallos, Italo
name: García-Cunchillos, Iván
name: Basanta, Diana Wrigley De
name: Lado, Carlos
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Protozoa
Mycetozoa
Myxomycetes
Trichiales
Arcyriaceae
Perichaena
Perichaena depressa

description: 105. Perichaena depressa Lib., Pl. crypt. Arduenna 378 (1837)   
 Specimens examined. PERU. Ancash: Bolognesi, trail to Pampam town, Aynin bridge, route PE-3N, km 459, 3089 m, 10º07′30”S, 77º09′28”W, 20 May 2014, leaf of Agave americana, Lado 23662 (MA-Fungi 95337). Huaraz, Independencia, route AN-14, km 133, 5 km from Huaraz, 3473 m, 9º32′33”S, 77º33′19”W, 9 May 2018, leaves of Agave americana, Lado 26133 (MA-Fungi 96937). Huari, Huari, Challhuyacu, Huamantanga, 7 km south of Huamparán, 3238 m, 9º18′13”S, 77º10′16”W, 12 May 2018, woody debris, Lado 26476 (MA-Fungi 97261). Huantar, 3292 m, 9º26′48”S, 77º11′00”W, 13 May 2018, leaves of Agave americana, Lado 26512 (MA-Fungi 97294), woody debris, Lado 26534 (MA-Fungi 97315). Huantar, Succha, route PE-14A towards Huantar, 3 km from the junction to route AN- 110, 3064 m, 9°27′01”S, 77°11′03”W, 13 May 2018, on rhytidome of Polylepis sp. (mc, 15 Dec 2018, pH 5.62), Treviño Myx 639 (HSP), Treviño Myx 640 (HSP). Huancavelica: Angaraes, Julcamarca, route PE-26B, km 146, Julcamarca, 3400 m, 13º01′52”S, 74º25′56”W, 22 Apr 2017, inflorescence of Tillandsia sp. (mc, pH 6.2), Lado 25005 (MA-Fungi 96199, USM). Julcamarca, Julcamarca, route PE-26B, km 150, 3400 m, 13°01′52”S, 74°25′56”W, 22 Apr 2017, on leaf litter of Puya sp. (mc, 28 May 2020, pH 6.51), Treviño Myx 631 (HSP). Tayacaja, Acostambo, route. PE-3A, km 173, 3333 m, 12º23′12.8”S, 75º03′41.2”W, 24 Sep 2012, leaves of Agave americana, Lado 21779 (MA-Fungi 94544, USM, sls), Lado 21780 (MA-Fungi 94545, sls). Huanuco: Huánuco, Margas, route HU-111, km. 31, 3574 m, 9º59′59”S, 76º31′23”W, 17 May 2018, leaf of Agave americana, Lado 26914 (MA-Fungi 97671), Lado 26915 (MA-Fungi 97672), Lado 26917 (MA-Fungi 97673), Lado 26918 (MA-Fungi 97674), Lado 26919 (MA-Fungi 97675), Lado 26920 (MA-Fungi 97676). Junin: Huancayo, Cullhuas, route PE-3A, km 142, 3450 m, 12º11′59.6”S, 75º10′47.8”W, 24 Sep 2012, debris of Austro cylindropuntia pachypus, Lado 21770b (MA-Fungi 94534, USM), Lado 21771 (MA-Fungi 94535). Yauli, Chacapalpa, route PE-3S, km 35, Chacapalca, 3623 m, 11º43′37”S, 75º45′18”W, 29 Apr 2017, leaves of Agave americana, Lado 25551 (MA-Fungi 96707, USM), Lado 25555b (MA-Fungi 96711), Lado 25556 (MA-Fungi 96712), Lado 25558b (MA-Fungi 96714, USM). 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 25668b (MA-Fungi 96826, USM). Moquegua: Mariscal Nieto, Torata, Pontón Cuellar, route PE-34D, km 69, 3815 m, 16º59′54.8”S, 70º41′54.7”W, 7 Oct 2012, twigs and leaf litter of Baccharis glutinosa, Lado 22172b (MA-Fungi 94724, USM). Puno: San Román, Cabanilla, route PE-34A, km 253, 15 km east of Santa Lucía, 3950 m, 15°39′55” S, 70°28′43” W, 8 Oct 2012, Azorella diapensioides leaf bases, (mc, 10 Jan 2013, pH 6.09), dwb 3542. Cabanilla, ctra. PE-34A, km 253, 15 km east of Santa Lucía, 8 Oct 2012, Azorella diapensioides leaf bases, (mc, 22 Jan 2013, pH 6.04), dwb 3547.   
 Notes. It isn’t easy to distinguish from Perichaena quadrata T. Macbr., especially in the intermediate forms. To identify the material collected, we followed Keller & Eliasson (1992), who differentiated the species by the sporotheca shape, remarkably flattened in P. depressa vs depressed, pulvinate, or globoid in P. quadrata, and the peridium after dehiscence, remaining as a lid in P. depressa, or evanescent and revealing the spores in P. quadrata. In addition, the capillitium in P. quadrata has the surface marked with an irregular reticulum and septa into the lumen.
description: Published as part of 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, pp. 1-92 in Phytotaxa 624 (1) on page 53, DOI: 10.11646/phytotaxa.624.1.1, http://zenodo.org/record/10150721