Coccinodiscus

Vondrák, Jan, Frolov, Ivan, Davydov, Evgeny A., Yakovchenko, Lidia, Malíček, Jiří, Svoboda, Stanislav & Kubásek, Jiří, 2019, The lichen family Teloschistaceae in the Altai-Sayan region (Central Asia), Phytotaxa 396 (1), pp. 448-450 : 448-450

Coccinodiscus group

Single species recorded in the region. Thallus is crustose, of a few brown areoles, or entirely reduced; lichenicolous. Vegetative diaspores are absent. Anthraquinone content in apothecial disc is unknown. Coccinodiscus group was introduced by Poelt & Kalb (1985) as a section of Caloplaca including C. congrediens , C. grimmiae , C. phaeothamnos . Close relationship of all three species is supported by the ITS sequence data (Vondrák, in preparation).

‘ Caloplaca ’ grimmiae : 6 localities at altitudes 600–2200 m in all ecological classes, except for humid non-alpine. Substrate: siliceous rocks, lichenicolous on Candelariella vitellina .

unknown ‘ Caloplaca ’ sp. ( Fig. 16D )

It resembles some species of Athallia . Thallus is endophloedal and concentrated below apothecia. Vegetative diaspores are absent.Apothecia contain non-chlorinated anthraquinones. Identity of the species is unclear; it has no close relatives in the ITS tree. Single specimen was recorded at altitude 1120 m in sparse Larix forest on hard wood of Larix stump (Vondrák 18687).

Acknowledgement

Linda in Arcadia kindly revised the manuscript. Toby Spribille generously provided his specimens for sequencing. Imaging of lichen species was made in co-operation with Jiří Machač. JV received support from the long-term research development grant RVO 67985939. IF was supported by the national project at the Institute Botanic Garden (Russian Academy of Sciences, Ural Branch) and from the Russian Foundation for Basic Research (project no. 16-04-01488).

Figures

FIGURE 16. ‘Caloplaca’ exsecuta (A, B), Xanthocarpia (C) and an unknown ‘Caloplaca’ (D).A, ‘Caloplaca’ exsecuta (Vondrák 11110) with yellow-orange discs; B, ‘C.’ exsecuta (Vondrák 11105) with ferrugineous red discs; C, Xanthocarpia sp. (Vondrák 18686) resembling the Mediterranean X. marmorata; D, unknown ‘Caloplaca’ with unresolved ITS position within Xanthorioidae (Vondrák 18687).All bars, 1 mm.