Fungalpedia – Note 550, Igneoplaca 

 

Igneoplaca S.Y. Kondr., Kärnefelt, Elix, A. Thell & Hur

Citation when using this data: Tibpromma et al. 2024 (in prep.) – Fungalpedia, Rock-inhabiting fungi.

Index Fungorum, Facesoffungi, MycoBank, GenBank, Fig. 1

Classification: Teloschistaceae, Teloschistales, Lecanoromycetidae, Lecanoromycetes, Pezizomycotina, Ascomycota, Fungi.

Based on phylogenies of multi-gene (ITS, LSU, and mtSSU) sequence analyses, Kondratyuk et al. (2014) proposed Igneoplaca as a monotypic genus within the subfamily Xanthorioideae in Teloschistaceae, Teloschistales in Lecanoromycetes, with the type species of Igneoplaca ignea. To date, the genus is the only known species (I. ignea), which was from North America on acidic rock in open sunny areas (Kondratyuk et al. 2014). The type species was initially described as Caloplaca ignea (Arup 1995). Igneoplaca, similar to Caloplaca, can differ by the prosoplectenchymatous medulla. Igneoplaca is characterized by thallus crustose, lobate, smooth, red to orange; hypothallus not developed; cortical layer paraplectenchymatous, medulla prosoplectenchymatous. Apothecia are lecanorine; both thalline and true exciple paraplectenchymatous; 8-spored asci, and polarilocular ascospores. Thallus and apothecia K+ purple; constituents: anthraquinones of the parietin biosynthesis (Kondratyuk et al. 2014). 

Type species: Igneoplaca ignea (Arup) S.Y. Kondr., Kärnefelt, Elix, Thell & J.S. Hur 

Other accepted species: This genus is monotypic.

Figure 1 – Habit of Igneoplaca ignea. Scale bar = 10 mm. Redrawn from Kondratyuk et al. (2014).

 

 

References

Arup U. 1995 – Eight species of Caloplaca in coastal Western North America. The Bryologist 98(1), 92–111.

Kondratyuk S, Kärnefelt I, Thell A, Elix J. et al. 2014 – A revised taxonomy for the subfamily Caloplacoideae (Teloschistaceae, Ascomycota) based on molecular phylogeny. Acta Botanica Hungarica 56(1-2), 141–178.

 

Entry by

Lu W, Excellence Center of Microbial Diversity and Sustainable Utilization, Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand; Center for Yunnan Plateau Biological Resources Protection and Utilization, College of Biological Resource and Food Engineering, Qujing Normal University, Qujing, Yunnan 655011, China

 

(Edited by Saowaluck Tibpromma, Samaneh Chaharmiri-Dokhaharani, & Achala R. Rathnayaka)

 

Published online 13 December 2024

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