Leptogium austroamericanum (Malme) C.W. Dodge (1933: 419)

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 : 129

Leptogium austroamericanum (Malme) C.W. Dodge (1933: 419) . ( Figure 1A )

≡ Leptogium cyanescens var. austroamericanum Malme (1924: 21) .

Lectotype (designated in Benatti et al. 2013):— BRAZIL. Rio Grande do Sul: Santo Ângelo prope Cachoeira [Agudo municipality], 3 September 1819, G. O. A. Malme 950 B ( S!); isolectotypes:— Malme 950 A e D ( S!).

Description: Benatti et al. (2013).

Notes: Leptogium austroamericanum is an isidiate species with wrinkled upper surface.

It has wide distribution ( Hua-Jie et al. 2012) but may be more restricted than previously thought. Similar species may have been identified as L. austroamericanum and for this reason a detailed review with specimens from different regions is necessary, along with molecular studies to delimit the real circumscription of the species.

Distribution in Brazil: First record to Mato Grosso do Sul state, but previously recorded in Alagoas ( Pereira et al. 2006), Bahia ( Marcelli 1992), Mato Grosso ( Brako et al. 1985), Minas Gerais ( Aptroot 2002), Pará ( Brako et al. 1985), Rio de Janeiro ( Vainio 1890; Marcelli 1992), Rio Grande do Sul ( Spielmann 2006), Santa Catarina ( Gumboski & Eliasaro 2011), and São Paulo ( Benatti et al. 2013).

Examined material: BRAZIL. Mato Grosso do Sul: Aquidauana, Vila Palmeiras, on cortex, 17 November 1993, N.K. Honda, Devincenzi 053DH (No. EQL 0643, CGMS); Alcinópolis, Parque Estadual Nascente do Rio Taquari (PENT), 22 October 2017, M.J. Kitaura 4276 (CGMS); Corumbá, Tromba dos Macacos, 02 November 1993. s/c. 24817 (COR 3133); on Aspidosperma subincanum , 2 November 1993. M.P. Marcelli, O. Yano, G. Damasceno. 24820 pr. min. p. (COR 3155); idem, on bocaiuva tree, 02 November 1993. M.P. Marcelli, O. Yano, I. Ishii, G. Damasceno 24824 (COR 3167); s/n. pr. max. p. (COR 3174); s/c, s/n (COR 3130); sub-region Pantanal do Paraguai, Castelo Bay, 18°33’52.80”S, 57°34’29.30” W, 92 m elev., corticolous on riparian forest, on rock, 22 November 2010, T.H. Stefanello, V.S. Santos, A.C.S. Brito, A.A. Spielmann, L.S. Canêz 79 (CGMS 30106); RPPN rumo ao oeste, Guaia Bay, 17°44’18.10”S, 57°41’27.80” W, 91 m elev., riparian forest, 28 November 2010, A.A. Spielmann, L.S. Canêz, T.H. Stefanello, A.C.S. Pinto, V.S. Santos 8813 (CGMS 42255); Brazil-Bolívia Frontier, sub-region Pantanal of Paraguay, margin of Mandioré Bay (Bolívia side), 18°11’50.70”S, 57°30’39.70”W, 90 m elev., 23 November 2010, A.A. Spielmann, L.S. Canêz, T.H.D. Leandro, S. Zacharias, W.S. Arruda 8726 pr. max. p. (CGMS 42266); Porto Murtinho, Fazenda Retiro Conceição, 21º40’57.00”S, 57º46’45.00”W, 80 m elev., corticolous (on Castela ) preserved area of wooded Chaco , ± shaded, 14 December 2010, A.A. Spielmann et al. 8983 (CGMS 42232); 21º41’11.78”S, 57º46’17.26”W, 88 m de alt., corticolous, in open area, 14 December 2015, J.M. Torres 480 (CGMS); Fazenda Barbas, 21°41’06.50”S, 57°43’10.20”W, 105 m de alt., corticolous, on trunk base, in shaded area, 12 June 2017, A.S. Rodrigues et al. 188 (CGMS); road to morro Pão de Açúcar, 21º29’09.80”S, 57º55’46.10”W, 89 m elev., in a hill next to Paraguai river, corticolous, 13 June 2017, J.M. Torres et al. 639 (CGMS).

Figures

FIGURE 1. A–F. Leptogium species.A. L. austroamericanum (TH Stefanello 79). B. L. chloromelum (SS Moura 111). C. L. cochleatum (VJ Pott 6281). D. L. coralloideum (TD Barbosa 672). E. L. cyanescens (SML Souza 133). F. L. cyanizum (LS Canêz 32423). Bars: 2 mm (A–F).