Polymeridium contenden
Polymeridium contendens (Nyl.) R.C. Harris, in Tucker & Harris, Bryologist 83(1): 12 (1980).
≡ Verrucaria contendens Nyl., Acta Soc. Sci. fenn. 7(2): 492 (1863).
Index Fungorum number: IF 112732; Facesoffungi number: FoF 12016, Fig. 1
Description: see Aptroot and Ferraro (2000); Aptroot and Lücking (2016).
Material considered: see Aptroot and Ferraro (2000); Aptroot and Lücking (2016).
Fig. 1 Habit of Polymeridium spp. a P. amyloideum NY_iso_1957. b P. catapastum (BAHA britton6650 NY_2104). c P. subcinereum (DOMR Harris 19593 NY 2089).
Fig. 2 Polymeridium spp. (a–c P. bambusicola CTES, holotype, re-drawn from Fig. 1 in Aptroot and Ferraro 2000). a General habit. b Ascus with ascospores. c Mature ascospores. d Ascospores of P. biloculare, Dumont BR 594, holotype, re-drawn from Fig. 2E in Harris 1984). Scale bars: a = 1 mm, b–d = 10 μm.
Importance and distribution
There are 48 Polymeridium epithets in Index Fungorum (2022), but several species have been transferred to Clathroporina and Dictyomeridium. Polymeridium comprises 50 species known on bark of Myrcinaceae, Qualea (Vochysiaceae) and smooth stems of Poaceae. Polymeridium is reported from Asia (Andaman Island, India, Java, Philippines, Sri Lanka), Australia, North America (Caribbean (Puerto Rico), The United States) and South America (Argentina (Corrientes), Brazil).
References
Aptroot A, Ferraro LI. 2000 – A new species of Polymeridium (Trypetheliaceae) non-lichenized ascomycetes from the Macrosistema Iberà, Corrientes, Argentina. Bonplandia 10, 139–141. http://www.jstor.org/stable/41941226
Aptroot A, Lücking R. 2016 – A revisionary synopsis of the Trypetheliaceae (Ascomycota: Trypetheliales). Lichenologist 48, 763–982.
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