Hondaria leptospora (Malme) M.J. Kitaura, M.C. Scur & A.P. Lorenz, comb. nov.
MycoBank number: MB 835522; Index Fungorum number: IF 835522; Facesoffungi number: FoF;
Collema leptosporum Malme, Ark. Bot. 19(8): 6 1924.
Type – Brazil, Mato Grosso do Sul state, Corumbá municipality, Malme s/n (LD, S, UPS – syntypes).
Arctomia leptospora (Malme) Otálora & Wedin, Lichenologist 45(3): 302 2013.
Etymology – The epithet leptospora refers to thin ascospores of the species, 3–4(–5) µm thick.
Description – see description of the genus and more details in Malme (1924) and Degelius (1974).
Known distribution – On cortex in west-central Brazil near the border region with Bolivia, and Paraguay.
Material examined – Brazil, Mato Grosso do Sul state, Aquidauana municipality, Vila Palmeiras, 17 Nov 1993, N.K. Honda & Devincenzi 061H, 095DH (CGMS); IDEM, Campo Grande municipality, campus of Universidade Federal de Mato Grosso do Sul (UFMS), 24 Jul 2017, J.B. Paula & M.J. Kitaura 02, 03, 04 (CGMS); IDEM, campus of UFMS, 19 Jan 2011, A.L. Simal & P.H.R. Medeiros 22 (CGMS 42162); IDEM, campus of UFMS, 29 Feb 1989, I. Riquelme 061 (CGMS); IDEM, Vila da Base Aérea, on cortex, 25 Feb 1989, I. Riquelme 094, 273, 288 (CGMS); IDEM, Jardim Itatiaia, 13 Mar 1991, I. Riquelme 282, 283 (CGMS); IDEM, Jaraguari municipality, furnas do Dionísio, 13 Nov 2015, C.M. Bernardo 813 (CGMS); IDEM, 20°08’54.3” S, 54°34’14.9” W 435 m. alt., 12 Sep 2015, C.M. Bernardo, A.A. Spielmann, M.J. Kitaura et al. 762 (CGMS); IDEM, 20°08’54.1” S, 54°34’15.1” W, 425 m alt., 22 Nov 2011, A.L. Simal, L.S. Canêz & A.A. Spielmann 92 (CGMS).
Notes – The species is characterized by the presence of granular isidia (Fig. 3A, B), a euparaplectenchymatous proper exciple (Fig. 3C and E), and transversely septate ascospores with (100–)120–175(–200) × 2–4(–5) µm (Degelius 1974).
Figure 3. Hondaria leptospora. A. Specimen JBP 04. B. Detail of the ornamented apothecia with granular isidia on the margin. C. Diametral section of an apothecium. D. Detail of amorphous cortex. E. Detail of euparaplectenchymatous tissue. (hm = hymenium, ep = proper exciple, ct = cortex, hp = hyphae, arrow = cyanobacteria).