Leptogium milligranum Sierk (1964: 290)

Kitaura, Marcos J., Bernardo, Caique M., Koch, Natália M., Rodrigues, Andressa S., Torres, Jean-Marc, Barbosa, Thiago D., Canêz, Luciana Da S., Spielmann, Adriano A., Honda, Neli K., Fleig, Mariana & Lorenz, Aline P., 2019, Leptogium (Collemataceae, Peltigerales) from Mato Grosso do Sul state, Brazil: nine new records, three new taxa and a key for the species, Phytotaxa 399 (2), pp. 127-146 : 139

Leptogium milligranum Sierk (1964: 290) . ( Figure 3C )

Holotype:— USA. New Jersey: Pasadena, on bark, G.G. Nearing s/n (F!).

Description: Sierk (1964) and Kitaura (2012).

Notes: Leptogium milligranum is characterized by the ridged thallus, covered by granular isidia. The isidia are darker than the thallus and coralloid.

Fertile specimens were not found in Mato Grosso do Sul, but, when present, the apothecia have thick proper exciple composed by paraplectenchymatous tissue and fusiform ascospores ( Sierk 1964).

Distribution in Brazil: First record to Mato Grosso do Sul state, but the species was recently reported to São Paulo ( Kitaura et al. 2017).

Examined material: BRAZIL. Mato Grosso do Sul: Aquidauana , Rodovia MS 450, on branch, 20°27’27.40”S 55°29’12.00” 188 m elev., 29 November 2014, S. R. Ramalho, F.M. R. Godoy, M.M. Morelli, P.P. Oliveira, A.A. Spielmann 44 ( CGMS 47810 ) ; Campo Grande, Jardim Itatiaia , on cortex, 13 March 1991, I. Riquelme 0283 pr. min. p. (No. EQL 0454, CGMS) ; Vila da Base Aérea , on cortex, 19 June 1991, I. Riquelme 0288 pr. p. (No. EQL 0457, CGMS) .

Figures

FIGURE 3. A–B. Leptogium species. A. L. marginellum (AA Spielmann 8367). B. L. microcarpum (AL Simal 188). C. L. milligranum (SR Ramalho 44). D–F. Leptogium moluccanum var. denticulatum (CM Bernardo 465). D. Detail of the thallus. E. Transversal section of the thallus, arrows = columnar hyphae. F. Transversal section of the apothecia, arrow = subparaplectenchymatous parahymenium tissue. Bars: 2 mm (A–D); 50 μm (E); 100 μm (F).