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Riccardia martinii Reeb & Gradst. sp. nov. (Fig. 4 A-I) DIAGNOSIS. — Dry thallus with white margins and with an orange-colored network of thick-walled dorsal epidermis cells. TYPE. — Madagascar. Alaotra-Mangoro, Zahamena Nat. Park, 17°38’22”S, 48°38’47”E 1247 m, 26.XII.2013, Reeb & Andriamanantena CR 13 Z 9* (holo-, PC [PC 0763851]). FURTHER SPECIMENS EXAMINED. — Réunion. St Denis, 1500 m, 11.X.1962. Een R 039 (S-B12531); Piton de la Fournaise, 21°19’00”S, 55°42’00”E, 800-870 m, 23.II.1995, Pócs 9501 H * (G 00264150, EGR), 21°18.5’S, 55°42’E, 800-1080 m, Pócs 9602/ CU * (G 00264153, EGR), 21°18’0S, 55°42.7’E, 1800 m, 30. VI.1996, Pócs 9612/ CC, 9 613/ CC *, 9613/CW (EGR); Plaine des Caffres, 21°09’S, 55°33’E, 1850 m, 22.VII.1996, Vojko 9660 / CS (G 00264121, EGR); Forêt de Bélouve, 21°4’S, 55°31.6’E, 1610-2000 m, Pócs 9618/ CU (EGR). Madagascar. Alaotra-Mangoro, Zahamena Nat. Park, 17°38’22”S, 48°38’47”E 1247 m, 26.XII.2013, Reeb & Andriamanantena CR 13 Z 9 * (PC 0763856), CR 13 Z 25 * (PC 0763863); Vohimana Reserve, 18°55’43.6”S, 48°29’56.6”E, 849 m, 15.IV.2010, Reeb, Andriamanantena & Bidault; CRAE 106 (PC); Sava, Marojejy Nat. Park, X.2010, Bardat JBMAD 78* (PC 0763890). Tanzania. Uluguru Mts., Kinole Village, 1480-1530 m, 05.II.1973, Pócs & Lubgwecha 6877/ K (G 00264154, EGR), Kibale Forest, 1730 m, 19.X.1971, Pócs 6477/ M (G 00264161, EGR)., Bondwa, 2125 m, 13.XII.1972, Pócs & Crosby 6947/ K (EGR), ridge and Lupanga peak, 2100-2400 m, 21.XI.1969, Pócs & Csontos 6072/ BA (EGR). DISTRIBUTION. — Tanzania, Madagascar and Réunion. HABITAT. — On dead wood, bark on peaty soils covered a dense bryophyte layer, occurring between 400 and 4000 m but mainly found at mid elevations (800-1500 m). ETYMOLOGY. — Dedicated to Martin Reeb-Leurent, born 25/05/2011. DESCRIPTION. Monoicous (autoicous) or dioicous. Thallus Fleshy to leathery,rigid, green, glossy,green to dark brown or black in herbarium, to 22 mm long, when dry crisped or with recurved branches and with white margins, main axis closely ... |