Collemopsidiales » Xanthopyreniaceae » Collemopsidium

Collemopsidium iocarpum

Collemopsidium iocarpum (Nyl.) Nyl., Flora, Regensburg 64: 6 (1881).

≡ Pyrenopsis iocarpa Nyl., Not. Sällsk. Fauna et Fl. Fenn. Förh., Ny Ser. 5: 26 (1861).

            Index Fungorum number: IF 383526; Facesoffungi number: FoF 11912, Fig. 1

Description: see Pérez-Ortega et al. (2016).

Material considered: see Pérez-Ortega et al. (2016).

Fig. 1 Collemopsidium mauritiae (holotype, re-drawn from Fig. 8 in Pérez-Ortega et al. 2016). a Thallus with perithecia. b Section through perithecium. c Asci. d Ascospore with gelatinous sheath. e Paraphysoids. Scale bars: a = 200 μm, b = 20 μm, c, e = 10 μm, d = 5 μm.

Importance and distribution

Species of Collemopsidium are lichenicolous and develop borderline lichen symbioses with algae or cyanobacteria (Kohlmeyer et al. 2004, Pérez-Ortega et al. 2016). Collemopsidium does not form well-differentiated thallus but rather simple bundles of fungal mycelia intertwining clusters of algal cells (Fernández-Brime et al. 2019). There are 25 Collemopsidium epithets in Index Fungorum (2022), but seven species have been transferred to Frigidopyrenia, Magmopsis, Mycosphaerella and Pyrenocollema. Collemopsidium comprises sixteen species known on soil and rocks, Pilophorus dovrensis (Cladoniaceae), and zinc-contaminated wood. Collemopsidium is mostly reported from Africa (Mauritius), Asia (Japan), Australia (Tasmania, Heard-McDonald Islands) and Europe (Netherlands, Sweden, Ukraine, United Kingdom). Collemopsidium might comprise many more species awaiting discovery.

 

References

Fernández-Brime S, Muggia L, Maier S, Grube M, Wedin M. 2019 – Bacterial communities in an optional lichen symbiosis are determined by substrate, not algal photobionts. FEMS Microbiology Ecology 95, fiz012. https://doi.org/10.1093/femsec/fiz012

Grube RBD. 2002 – Collemopsidium. In: Nash TH, Ryan BD, Gries C, Bungartz F (eds) Lichen flora of the Greater Sonoran Desert Region. Lichens Unlimited, Tempe, pp 1162–1164.

Kohlmeyer J, Hawksworth D, Volkmann-Kohlmeyer B. 2004 – Observations on two marine and maritime “borderline” lichens: Mastodia tessellata and Collemopsidium pelvetiae. Mycological Progress 3, 51–56.

Mohr F, Ekman S, Heegaard E. 2004 – Evolution and taxonomy of the marine Collemopsidium species (lichenized Ascomycota) in north-west Europe. Mycological Research 108, 515–532.

Pérez-Ortega S, Garrido-Benavent I, Grube M, Olmo R, de los Ríos A. 2016 – Hidden diversity of marine borderline lichens and a new order of fungi: Collemopsidiales (Dothideomyceta). Fungal Diversity 80, 285–300.

Santesson R. 1939 – Amphibious pyrenolichens I. Arkiv för Botanik 29 (10), 1–68.

 

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