Xanthocarpia

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

Xanthocarpia

Five species recorded in the region. Thallus is yellow (rarely pale grey, without anthraquinones), areolate (in X. interfulgens ), but usually strongly reduced, endolithic or restricted to thalline apothecial margin. Vegetative diaspores are only present in the sorediate X. tominii . Apothecia are present. All species are confined to inorganic substrates, strongly preferring calcareous rocks or concrete (rarely on mineralized wood). Species richness is high in dry continental Asia and Mediterranean Europe; degree of overlap in species composition between those regions is not clear yet. The genus is characterised by narrowly ellipsoid ascospores with thin septa (three septate ascospores in the European X. ochracea ). Rufoplaca has similar, but generally shorter and even narrower ascospores and preferrs more acidic siliceous rocks. Literature: Arup et al. (2013), Vondrák et al. (2011, 2017).

Xanthocarpia crenulatella sensu lato: 12 localities at altitudes 250–1640 m, mostly in arid and humid non-alpine habitats. Substrate: calcareous rocks (sandstone, limestone) and concrete.

Xanthocarpia ferrarii sensu lato: 17 localities at altitudes 400–2350 m, mostly in arid alpine and non-alpine habitats. Substrate: calcareous rocks (sandstone, limestone, schist) and concrete.

Xanthocarpia interfulgens : 15 localities at altitudes 250–2900 m, mostly in arid alpine and non-alpine habitats. Substrate: calcareous rocks (sandstone, limestone).

Xanthocarpia cf. marmorata , Fig. 16C : 11 localities at altitudes 400–1750 m, mostly in arid alpine and non-alpine habitats. Substrate: limestone. Distinct from the Mediterranean X. marmorata in larger apothecia and in ITS sequences.

Xanthocarpia tominii : 7 localities at altitudes 250–2900 m in all ecological categories but humid non-alpine. On organic or inorganic substrate: sandstone, schist (often calcareous), plant debris, hard soil.

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.