Small island but great diversity: thirty six species of Parmotrema (Parmeliaceae, lichenized Ascomycota), including sixteen new species, on Réunion (Mascarenes), with additional data from the Western Indian Ocean Author Masson, Didier 0000-0002-3340-5472 Vertevoye, 2860 route d’Irieu, F- 40390 Saint-Martin-de-Seignanx, France di. masson @ wanadoo. fr; https: // orcid. org / 0000 - 0002 - 3340 - 5472 di.masson@wanadoo.fr Author Magain, Nicolas 0000-0001-5409-9518 Evolution and Conservation Biology, InBios research centre, Sart Tilman B 22, Quartier Vallée 1, Chemin de la vallée 4, B- 4000 Liège, Belgium nicolas. magain @ uliege. be; https: // orcid. org / 0000 - 0001 - 5409 - 9518 nicolas.magain@uliege.be Author Sérusiaux, Emmanuël 0000-0002-3340-5472 Vertevoye, 2860 route d’Irieu, F- 40390 Saint-Martin-de-Seignanx, France di. masson @ wanadoo. fr; https: // orcid. org / 0000 - 0002 - 3340 - 5472 & Evolution and Conservation Biology, InBios research centre, Sart Tilman B 22, Quartier Vallée 1, Chemin de la vallée 4, B- 4000 Liège, Belgium e. serusiaux @ uliege. be; https: // orcid. org / 0000 - 0002 - 0456 - 0131 * Corresponding author & Vertevoye, 2860 route d’Irieu, F- 40390 Saint-Martin-de-Seignanx, France di. masson @ wanadoo. fr; https: // orcid. org / 0000 - 0002 - 3340 - 5472 di.masson@wanadoo.fr text Phytotaxa 2024 2024-06-27 657 1 1 138 http://dx.doi.org/10.11646/phytotaxa.657.1.1 journal article 10.11646/phytotaxa.657.1.1 1179-3163 13217474 Parmotrema paulense (Zahlbr.) Hale (1974a: 338) MycoBank no. 343102 Parmelia paulensis Zahlbr. (1909: 175) MycoBank no. 398025 Type :— BRAZIL . São Paulo : In monte Jaraguá prope Taipas , 800–1050 m , corticola, June 1901 , V. Schiffner s.n. (W!, type collection) . In his monograph of Parmelia subgenus Amphigymnia , Hale (1965a: 335) cited, under the name Parmelia paulensis , a specimen from Réunion [‘no locality, Rodriguez , 1890 (P)’]. In their subsequent circumscriptions of P. paulensis , neither Kurokawa (1969) nor Hale (1971b) re-examined this material, which is probably the same as that which was cited by Hue (1899: 199) under the name Parmelia melanothrix var. lacinulata . In PC we found a collection of two thalli (no PC 07222516 ) with a label written by Hue ‘ Parmelia melanothrix var. lacinulata Mull.Arg. , legerunt Fr. Rodriguez et M. Chauvet, Bourbon, 1890 et 1893’. One thallus belongs to the laciniate morphotype of Parmotrema intonsum , the other to the morphotype with granular isidia of the same species. It seems likely that the latter corresponds to the specimen cited by Hale (1965a) , given his concept of Parmelia paulensis at that time, although no annotation by this author appears on the attached label. The species was also reported from Réunion by van den Boom et al . (2011). The collection concerned ( P. van den Boom 40489 ) is Parmotrema intonsum (isidiate morphotype).