Heterodermia paradoxa Schumm & Schäfer-Verwimp, Herzogia

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

3. Heterodermia paradoxa Schumm & Schäfer-Verwimp, Herzogia 19: 36 (2006)

Type :— INDONESIA. North-Sumatra : Highland of Brastagi , ascent from lake Lau Kawar to Gunung Sinabung, in the canopy of a fallen tree, 1520 m, 18 May 2005, A . Schäfer-Verwimp & I . Schäfer-Verwimp 24902 ( B! holotype) .

Thallus foliose, orbicular to irregularly spreading, moderately to loosely adnate, to 6 cm wide, but often coalescing to form colonies up to 15 cm wide. Lobes 1–2 mm wide, not distinctly widened at the tips, plane to weakly convex, sublinear- to linear-elongate, regularly to irregularly branched, radiating; apices not ascending, contiguous to discrete, with short lateral lobes. Upper surface gray-white to greenish white, ± partly darkened in the centre, lacking soredia, isidia and phyllidia. Medulla white; lower medulla dark yellow to orange-brown. Lower surface ecorticate, with a superimposed layer of cotton-woolly hyphae, impregnated by yellow to orange-brown pigments. Marginal rhizines, black, simple or squarrosely branched, 1–2 mm long. Apothecia common, laminal, sessile to substipitate, 1.5–3.5 mm wide; margin crenate at first, lobulate at maturity; inner surface of lobules ecorticate, yellow-orange pigmented; disc concave, dark brown to brown-black, epruinose or weakly white-pruinose. Ascospores Pachysporaria - type, ellipsoidal, without sporoblastidia, 24–32 × 12–15 µm. Pycnidia common, immersed, then becoming emergent, visible as black dots; conidia bacilliform, 2–2.5 × 1 µm.

Chemistry: Cortex K + yellow, C –, KC–, P + yellow; upper medulla K + yellow, C –, P –; lower surface K + violet; containing atranorin (major), zeorin (major), 16β-acetoxyhopane-6α,22- diol (major), leucotylin (minor), 7- chloroemodin (minor), flavoobscurins A, B 1, B 2 (minor).

Distribution and habitat:—Very rare on bark of trees and shrubs ( Rhododendron microphyton is reported) in Chiang Mai at the edge of an evergreen rainforest and in a lower montane scrub forest in Loei province from 1265 to 1720 m above sea level; also in Sumatra.

Remarks: — Externally this species is identical to H. flabellata but differs in having smaller ascospores without sporoblastidia.

Material from Thailand examined:— Chiang Mai: Doi Inthanon ; at the edge of an evergreen rainforest N of checkpoint, on a freestanding tree, 1720 m, 18°36' N, 98°30' E, 8. April 2004, A . Schäfer-Verwimp 23854/B-b (hb. Schäfer-Verwimp, dupl. hb. Schumm 11757); Loei: Phuluang Wildlife Sanctuary , forest protection unit office Lon Tae substation, in lower montane scrub forest, on bark of Rhododendron microphyton , 1265 m, 17°14'18'' N, 101°33'19'' E, 12 November 2009, S . Meesim RU-MSPL 683, ( RAMK 21154 ) .

General explanations to the TLC-plates

Runs 1 to 17 show the chemical profiles of the following species:

1: Polyblastidium japonicum KK 39817. 2: Polyblastidium casarettianum (A. Massal.) Kalb , comb. nov., Mycobank MB 813854, Basionym: Anaptychia casarettiana A. Massal., Mem. lichenogr.: 39 (1853), KK 39820. 3: Polyblastidium corallophorum KK 40311. 4: Heterodermia granulifera KK 34029. 5: Heterodermia

THE LICHEN FAMILY PHYSCIACEAE IN THAILAND —II

Phytotaxa 235 (1) © 2015 Magnolia Press • 59 pseudospeciosa KK 33251. 6: Leucodermia leucomelos KK 37759. 7: Heterodermia albicans KK 37760. 8: Heterodermia verdonii GZU s.n. 9: Heterodermia speciosa KK 13287. 10: Heterodermia flabellata KK 40320. 11: Heterodermia dissecta RAMK 021767. 12: Polyblastidium cf. hypoleucum RAMK 021156. 13: Heterodermia lepidota KK 13865. 14: Heterodermia tremulans KK 39561. 15: Polyblastidium hypocaesium (isotype, H). 16: Heterodermia aff. obscurata KK 37768. 17: Leucodermia appalachensis NY 01231274.

Abbreviations: KK= Herbarium Klaus Kalb, GZU = Herbarium University Graz, H = Herbarium Helsinki University, RAMK = Herbarium Ramkhamhaeng University Bangkok, NY = Herbarium New York Botanical Garden.

60 • Phytotaxa 235 (1) © 2015 Magnolia Press

MONGKOLSUK ET AL.