New species and new combinations in the lichen generaFissurinaandHemitheciumfrom India

Abstract

In continuation of our ongoing revisionary studies on the lichen family Graphidaceae from India, a treatment of 25 species of the lichen genera Fissurina and Hemithecium from India is presented. In our earlier work on the lichen genus Fissurina, 16 species were reported from India. In the present study, 17 additional species of Fissurina from India are recognized. Nine species, viz. Fissurina andamanensis, F. disposita, F. immersa, F. indica, F. microcarpa, F. nicobarensis, F. simplex, F. sporolata, and F. submonospora, are described as new to science. Seven species, viz. Fissurina canlaonensis, F. cingalina, F. comparimuralis, F. monospora, F. nitidescens, F. rubiginosa, and F. subnitidula, are recorded for the first time from India. One species, Fissurina sp. 1, is recorded but not formally described as new due to scanty material. Eight species in the lichen genus Hemithecium, including three new species, viz. H. kodayarense, H. longilirellatum, H. verrucosum, and five new combinations, viz. Hemithecium andamanicum, H. flabillatum, H. flavoalbum, H. flexile, and H. norlabiatum, are also recognized in the present work. A revised key for the identification of all 33 species of Fissurina and 26 species of Hemithecium so far known from India is provided.

New Additions to Lichen Mycota of the Republic of Korea

“…Fissurina is characterized by mostly slit-like lirellae (fissurine), which distinguish it from other lirellate members of Graphidaceae. In addition, the ascospores of the genus are thick-walled and halonate [ 15 , 16 ]. Thelotrema , on the other hand, contains species with mostly lepadinoid apothecia with more or less free excipulum lined internally by periphysoids [ 14 ].…”

New combinations and synonyms inGraphidaceae(lichenized Ascomycota) from India

“…In ascospore character, it also closely resembles F. submonospora B. O. Sharma et al . which has short emergent (0.5–1.0 mm long) lirellae with a slit-like disc; the labia are entire and the exciple convergent and entirely covered by a thalline margin (Sharma et al 2012).…”

“…Staiger with its 3-septate amyloid ascospores. Fissurina andamanensis is distinguished by its fissurine lirellae, large, 20–27 μm long ascospores (Sharma et al 2012) and the presence of salazinic acid, while F. khasiana has large, 16–19 × 8–10 μm ascospores and contains stictic and constictic acids. Fissurina humilis has a laterally carbonized exciple and large, 14–25 × 7–9 μm ascospores.…”

“…The former is therefore synonymized here. (Sharma et al 2012) and the presence of salazinic acid, while F. khasiana has large, 16-19 × 8-10 μm ascospores and contains stictic and constictic acids. Fissurina humilis has a laterally carbonized exciple and large, 14-25 × 7-9 μm ascospores.…”

New and interesting species in the family Graphidaceae (Ascomycota: Ostropales) from Vietnam

“…Colour reaction spot tests and thin-layer chromatography (TLC) in solvent system A were used for the determination of lichen compounds following Orange et al (2010). Relevant references (Staiger & Kalb 1999;Staiger 2002;Frisch et al 2006;Makhija & Adawadkar 2007;Archer 2009;Lücking 2009;Lücking et al 2009Lücking et al , 2012Mangold 2009;Rivas Plata et al 2010;Singh & Sinha 2010;Lumbsch et al 2011;Sharma et al 2012;Singh et al 2013;Bárcenas Peña et al 2014;Cáceres et al 2014) were used for identification. Lugol's solution was used to check the amyloidity of the hymenium, asci and ascospores.…”