Pyrenidium aggregatum

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Taxonavigation: Pleosporales 

Superregnum: Eukaryota
Regnum: Fungi
Subregnum: Dikarya
Divisio: Ascomycota
Subdivisio: Pezizomycotina
Classis: Dothideomycetes
Subclassis: Pleosporomycetidae
Ordo: Pleosporales

Familia: Dacampiaceae
Genus: Pyrenidium
Species: Pyrenidium aggregatum


Pyrenidium aggregatum K. Knudsen & Kocourk., 2010

Life habit: Lichenicolous fungus (parasite on living lichens)   (on Phaeophyscia and Physcia)

Mycobank #518068.

Diagnosis: Similis Pyrenidio actinello differt ascosporis (15-)16.1-17.8-19.5(-21) x (6.5-)6.7-7.3-7.8(-8.5) μm et gallas formanti.

Type: U.S.A. PENNSYLVANIA. LYCOMING CO.: Tiadaghton State Forest, N-facing slopes above S shore of unnamed tributary to Francis Branch of Slate Run, along Francis Rd., 41°32’50”N 77°32’55”W, 1000 ft, on Phaeophyscia rubropulchra on Acer, 15.v.2009, J.C. Lendemer 17222 (NY, holotype; UCR, UGDA, hb. Kocourková, isotypes)

Etymology: The name refers to the aggregation of ascomata in galls on the thallus of the host

Ecology and Substrate On Phaeophyscia rubropulchra, often on Acer, Phaeophyscia adiastola on sandstone, and on Physcia atrostriata, in well-established mesic forests, freshwater swampland, and in a mangrove swamp

Distribution: Eastern North America, from Pennsylvania to Florida


  • Knudsen, K. and Kocourková, J. (2010) Pyrenidium aggregatum, a new species from North America. Opuscula Philolichenum 8: 71–74. (PDF file) (Plate 1. Pyrenidium aggregatum, fig. 1, galls; fig. 2, geographic distribution; fig. 3 conidia; fig. 4, ascospores)
  • Lawrey, J.D. and Diederich, P. (2010) Lichenicolous fungi – worldwide checklist, including isolated cultures and sequences available. Internet (1/12/2011)

Vernacular names[edit]