Leucodermia arsenei (Kurok.) 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 arsenei (Kurok.) Kalb , comb. nov.

Mycobank MB 813830

Basionym: Anaptychia arsenei Kurok., Beih. Nova Hedwigia 6: 89 (1962). Type:— Mexico. Puebla : Esperanza, 2400 m, 1907, Arsène 8089 (holotype US, n.v.). Heterodermia arsenei (Kurok.) Trass, Folia Cryptog. Estonia 29: 7 (1992).

Chemistry: Cortex K+ yellow, C–, KC–, P+ yellow; medulla K+ yellow then red, C–, P+ yellow-orange; containing atranorin (major), zeorin (major), salazinic acid (major), consalazinic acid (major), 16β-acetoxyhopane-6α,22-diol (minor).

Remarks: — Although we have not seen the type material, we have investigated several collections from Chiapas, SE of Puebla which matched the description given by Kurokawa (1962). The species was placed in ser. Podocarpae by Kurokawa (1962), but it seems more closely related to Leucodermia appalachensis . It differs from L. appalachensis in having broader lobes and by containing salazinic acid.

Specimen examined:— MEXICO. Chiapas: ca. 25 km NW of Comitan de Dominguez, in a dark and dry forest, dominated by Quercus spec. and Pinus spec. , 2150 m, 16°27’ N, 92°19’ W, 25 January 1979, K. Kalb & G. Plöbst (herb. Kalb 39870, 39872).