Polyblastidium microphyllum (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

7. Polyblastidium microphyllum (Kurok.) Kalb , comb. nov. ( Fig. 11B )

Mycobank MB 813845

Basionym: Anaptychia hypoleuca var. microphylla Kurok., J. Jap. Bot. 34: 123 (1959); Anaptychia microphylla (Kurok.) Kurok., Beih.

Nova Hedwigia 6: 44 (1962). Type:— JAPAN. Prov. Shinano: Higashi-Tikuma-gun, Sakakita-mura , 28 July 1953, Yamazaki s.n .;

( holotype, TNS n.v., isotype, TNS n.v.) .

Thallus foliose, orbicular to irregularly spreading, loosely adnate, 5–15 cm wide. Lobes 0.5–2.0 mm wide, plane to weakly convex or weakly concave, sublinear-elongate, irregularly to subdigitately branched; apices not ascending, ± discrete to contiguous at the periphery, with short lateral lobes, eciliate. Upper surface gray-white to gray, epruinose, with marginal dorsiventral lobules, rarely also laminal, usually minutely dissected, often granular near the tips, or entire phyllidia becoming granular and appearing sorediate. Medulla white. Lower surface ecorticate, white to grayish or pale brown in the centre. Rhizines numerous, mainly marginal, concolorous with the thallus or darkening and forming a dense marginal mat, irregularly branched. Apothecia rare, laminal, sessile to substipitate, 3–5 mm wide; margin phyllidiate, the phyllidia becoming ±sorediate; disc concave, brown to brown-black, epruinose. Ascospores Polyblastidia - type, ellipsoidal, mostly without polyblastidia, albeit in some specimens, some of the spores are with polyblastidia ( Swinscow & Krog 1988: 98), 25–35 × 12–18 µm. Pycnidia initially immersed, becoming emergent, visible as black dots; conidia bacilliform, 3–5 × 1 µm.

Chemistry: Cortex K+ yellow, C–, KC–, P+ yellow; medulla K+ yellow, C–, P+ pale yellow; containing atranorin (major), zeorin (major), aipolic acid (trace), 6α-acetoxyhopane-16β,22- diol (trace), japonene (trace), 6αacetoxy-16β,22-dihydroxyhopane-25-oic acid (minor), ±16β- acetoxyhopane-6α,22-dihydroxyhopane-25-oic acid (trace), anaptychin 1 (trace).

Distribution and habitat:—Known from hill evergreen forest; also in South America, Australia, East Africa, South Africa, South, South-east and East Asia and New Zealand.

Remarks:— This species is characterized by minutely dissected marginal phyllidia, ecorticate lower surface, Polyblastidia - type ascospores and presence of the japonica -chemosyndrome of triterpenes. It was not found amongst the material investigated, but may well occur in the country.

Material reported from Thailand:— Chiang Mai: Doi Inthanon National Park ; Nakhon Nayok: Khao Yai National Park ( Boonpragob et al. 1998: 217) .

Selected specimens examined: BRAZIL. Rio de Janeiro: Serra do Mar ; between Paratí and Cunha, in a light and humid coastal rainforest, 10 m, 23°10’ S, 44°50’ W, 2 November 1979, K. Kalb & G. Plöbst (herb. Kalb 40309) ; BRAZIL. São Paulo: Serra do Mar; between Taubaté and Ubatuba , ca. 150 km E of São Paulo, at the edge of a humid and dense rainforest, 800 m, 23°15’ S, 45°15’ W, 18 June 1978, K. Kalb & G. Plöbst (herb. Kalb 40283) — KENYA. Rift Valley: Mount Longonot , ca. 70 km NW of Nairobi, 9 August 1985, K. Kalb & A. Schrögl (herb. Kalb 14277) — PHILIPPINES. Cebu: Tops Lookout, ca. 7 km NW of Cebu City , 640 m, 10°22'15'' N, 129°52'16'' E, 14 August 2000, F. Schumm & Schwarz (herb. Schumm 7659) .

44 • Phytotaxa 235 (1) © 2015 Magnolia Press

MONGKOLSUK ET AL.

Figures

FIGURE 11. A. Polyblastidium japonicum (scale 5 mm). B. Polyblastidium microphyllum (scale 5 mm). C. Polyblastidium propaguliferum (scale 5 mm). D. Polyblastidium queenslandicum (scale 5 mm). E. Polyblastidium togashii (scale 5 mm). F. Polyblastidium violostriatum (scale 5 mm).