Leptogium phyllocarpum (Pers.) Mont. (1848: 134)

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 : 140

Leptogium phyllocarpum (Pers.) Mont. (1848: 134) . ( Figure 4A )

≡ Collema phyllocarpum Pers. (1826: 204) .

Neotype (designated by Jørgensen 2002):— BRAZIL. Rio Grande do Sul: Serra dos Vallos per Cruz Alta, in Arbore solitária ripae rivuli, 21 April 1893, G.A. Malme 1265 (S!).

Descriptions: Vainio (1890) and Malme (1924).

Notes: Leptogium phyllocarpum is characterized by the ridged thallus and the laminal apothecia ornamented by lobuliform structures originated from ridges on the amphithecia.

When sterile, L. phyllocarpum can be confused with L. marginellum by the presence of ridged thallus. Both species are differentiated only with the presence of apothecia that is frequent and laminal in L. phyllocarpum and abundant and marginal in L. marginellum .

Leptogium phyllocarpum has the thallus ridged like L. chloromelum , but L. phyllocarpum has the apothecia ornamented, whereas L. chloromelum has smooth apothecia.

Leptogium isidiosellum is covered by isidia, not found in L. phyllocarpum , a non-isidiate species; and the apothecia of L. hondae are ornamented by isidia like L. isidiosellum , whereas only lobuliform structures are found in the apothecia of L. phyllocarpum .

Distribution in Brazil: Bahia ( Marcelli 1992); Mato Grosso ( Malme 1924); Mato Grosso do Sul, in Corumbá and Ponta Porã ( Malme 1924, Osorio 1992); Minas Gerais ( Malme 1924); Paraná ( Osorio 1977); Rio de Janeiro (Persoon 1826); Santa Catarina ( Gumboski & Eliasaro 2011); São Paulo ( Marcelli 1992); Rondônia ( Aptroot & Cáceres 2014); and Rio Grande do Sul ( Spielmann 2006).

Examined material: BRAZIL. Mato Grosso do Sul: Alcinópolis, Parque Municipal Serra do Bom Jardim , trail templo dos Pilares , 18°08’54,2”S, 53°40’46.7”W, 550 m elev., 19 October 2017, S.M.L. Souza, L.C. Peinado, G.C. Andrella 93 ( CGMS 64747 ) ; PENT, 22 October 2017, M.J. Kitaura 4284 ; Aquidauana, Vila Palmeiras , on cortex, 01 December 1993, N.K. Honda, Devincenzi 092DH (No. EQL 0663, CGMS) ; 095DH ( No. EQL 0666, CGMS) ; Campo Grande, Vila da Base Aérea , on cortex, 13 February 1991, I. Riquelme 0278 p (No. EQL 0449, CGMS) ; Jardim, Balneário municipal, near the entrance, 21°25’18.40”S 56°23’36.50”W, 245 m elev., on cortex, 5 June 2010, A.A. Spielmann, L.S. Canêz, A.P. Lorenz Lemke 8357 ( CGMS 42194 ) .

Figures

FIGURE 4. A–D. Leptogium species. A. L. phyllocarpum (SML Souza 93). B–D. L. quilombensis (CM Bernardo 814, holotype). B. Detail of the thallus. C. Transversal section of the thallus, arrow = columnar hyphae. D. Transversal section of the apothecia, arrow = basal paraplectenchymatous tissue. Bars: 2 mm (A–B); 100 μm (C–D).