Leucodermia circinalis (Zahlbr.) Kalb, 2015

Mongkolsuk, Pachara, Meesim, Sanya, Poengsungnoen, Vasun, Buaruang, Kawinnat, Schumm, Felix & Kalb, Klaus, 2015, The lichen family Physciaceae in Thailand-II. Contributions to the genus Heterodermia sensu lato, Phytotaxa 235 (1), pp. 448-450 : 448-450

Leucodermia circinalis (Zahlbr.) Kalb , comb. nov.

Mycobank MB 813831

Basionym: Anaptychia leucomelaena (L.) A. Massal. var. multifida (Meyen & Flot.) Vainio f. circinalis Zahlbr., Beih. Bot. Centralbl. 19, 2. Abt.: 84 (1905); Type:— ECUADOR. [Cimborazo]: El Altar; Paramo region, 4200 m, Meyer 399. (W, n.v., lectotype, selected by Kurokawa 1962: 79). Heterodermia circinalis (Zahlbr.) W.A. Weber, Mycotaxon 13: 101 (1981).

Chemistry: Cortex K+ yellow, C–, KC–, P+ yellow; medulla K+ yellow, C–, P– or P+ pale yellow; containing atranorin (major), zeorin (major) and leucotylin (minor to trace).

Remarks:— Zahlbruckner (1905) and Kurokawa (1962) treated this species as a form of Heterodermia leucomelos or H. boryi . However, it differs from the former by lacking depsidones and from the latter by the more circinately enrolled tips of the lobe apices. Furthermore, its main distribution is in the paramos of South America, above 3000 m.

Specimen examined:— ECUADOR. Cañar: Side road from the Panamericana to Sangay National Park , in Paramo vegetation, on mosses and soil on a steep slope along the road, 3100 m, 02°21' S, 78°59,7' W, 31 August 2011, K. Kalb & H. Jonitz (herb. Kalb 40500) .