Leptogium fusisporum (Tuck.) C.W. Dodge (1933: 418)

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 : 133-135

Leptogium fusisporum (Tuck.) C.W. Dodge (1933: 418) . ( Figure 2B )

≡ Leptogium chloromelum var. stellans f. fusisporum Tuck. (1882: 164) .

Holotype: — USA. Florida: Caloosa River, Austin 1878 ( FH).

Description: Sierk (1964).

Notes: Leptogium fusisporum is characterized by a thallus composed of lacinuloid branches, with both upper and lower surfaces wrinkled, and the most pronounced wrinkles along the lobes length. The central part of the thallus consists of thickened lobules, and the ascospores are 25–40 × 6–7 μ m, transversely 3–5-septate ( Sierk 1964).

In the examined material, the thallus texture is more similar to that of L. phyllocarpum than L. austroamericanum and could be characterized as ridged; the thickened lobules have a cerebroid appearance; and the ascospores are transversely 3–5-septate, 30–50 × 5.0–7.5 μ m. Nevertheless, the examined material is still closer to L. fusisporum than any other species with transversely septate ascospores.

Usually this species is found sterile and can be confused with L. floridanum Sierk , which has fusiform and submuriform ascospores, 22–35 × 9–14 μ m ( Sierk 1964). However, here the correct name was used, L. fusisporum , after fertile specimens were studied.

Leptogium brebissonii and L. fusisporum are species with transversely septate ascospores reported to Mato Grosso do Sul, but L. brebissonii is an isidiate species and L. fusisporum is a non-isidiate.

Distribution in Brazil: First record to Mato Grosso do Sul. It is also known to São Paulo ( Cunha 2007).

Examined material: BRAZIL. Mato Grosso do Sul: Alcinópolis, Parque Estadual das Nascentes do Rio Taquari ( PENT), corticolous, 22 October 2017, M.J. Kitaura 4277 ( CGMS) ; 4287 ( CGMS); 4291 ( CGMS); Aquidauana, Vila Palmares, on cortex, 17 November 1993 N.K. Honda, Devincenzi 045DH ( No. EQL 0634, CGMS) ; 050DH ( No. EQL 0639, CGMS) ; 051DH ( No. EQL 0640, CGMS) ; 056DH ( No. EQL 0642, CGMS) ; 055DH ( No. EQL 0645, CGMS) ; 059DH ( No. EQL 0648, CGMS) ; 060DH ( No. EQL 0649, CGMS) ; 061DH ( No. EQL 0650, CGMS) ; 062DH ( No. EQL 0651, CGMS) ; 01 December 1993, N.K. Honda & Devincenzi 081DH (No. EQL 0652, CGMS) ; 082DH ( No. EQL 0653, CGMS) ; 083DH ( No. EQL 0654, CGMS) ; 090DH ( No. EQL 0661, CGMS) ; 093DH ( No. EQL 0664, CGMS) ; 094DH ( No. EQL 0665, CGMS) ; 30 March 1999, N.K. Honda 003/99 (No. EQL 0678, CGMS) ; 008/99 ( No. EQL 0680, CGMS) ; Corumbá, subregion Pantanal of Paraguay, Mandioré Bay , 18°11’50.70”S, 57°30’39.70”W, 90 m elev., corticolous in riparian forest, 23 November 2010, T. H.D Leandro, W.S. Arruda, S. Zacharias, A.A. Spielmann, L.S. Canêz. 64 ( CGMS 30379 ) ; 65 ( CGMS 30380 ) ; Mandioré Bay ( Bolivia 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 8718 ( CGMS 42210 ) ; 8720 ( CGMS 42228 ) ; 8726 pr. min. p. ( CGMS 42266 ) ; 8729 ( CGMS 42269 ) ; margin of Taquaral Bay , 18°02’42.30”S, 57°30’15.20”W, 83 m elev., corticolous on riparian forest, 26 November 2010, C.O. Dourado, T.S. Yule, M. T. Oliveira, A.A. Spielmann, L.S. Canêz 72 ( CGMS 30234 ) ; Jaraguari, Furnas do Dionísio , 20°08’34.1”S 54°34’13.8”W, 476 m elev., 12 August 2015, C.M. Bernardo et al. 726 ; 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 ) ; Piraputanga district , MS 450, 20°29’52.40”S 55°26’09.00”W 218 m elev., on cortex, 28 November 2014, A.L. Simal, B.A. Coutinho, P.P. Vaz, V. H.S. Brito & A.A. Spielmann 188 ( CGMS 46841 ) ; 191 ( CGMS 46844 ) .

Figures

FIGURE 2. A–F. Leptogium species. A. L. diaphanum (LC Canêz 3246). B. L. fusisporum (NK Honda 050). C–E. L. hondae (JM Torres 509, holotype). C. Detail of the thallus. D. Transversal section of the thallus. E. Transversal section of the apothecia, arrow = cortex of thalline exciple. F. L. isidiosellum (SS Moura 112). Bars: 2 mm (A–C, F); 50 μm (D–E).