Two new Asterina species on Michelia champaca from Kerala, India Author Hosagoudar, V. B. Author Riju, M. C. text Journal of Threatened Taxa 2011 2011-07-26 3 7 1942 1946 http://threatenedtaxa.org/index.php/JoTT/article/view/1209 journal article 10.11609/JoTT.o2746.1942-6 0974-7907 5032140 Asterina michelifolia sp. nov. ( Images 1–5 , Fig. 1 ) Materials examined: 20.ix.2008 , on leaves of Michelia champaca L. ( Magnoliaceae ), Chennalode, Padinharathara, Wyanad, Kerala , India , coll. M.C. Riju, HCIO 49111a ( holotype ), TBGT 3366a (isotype). MycoBank No. ( MB 561622 ). Coloniae hypophyllae, tenues, ad 2mm diam., confluentes. Hyphae flexuosae vel anfractuae, irregulariter acuteque vel laxe ramosae, formans retes arte reticulatae, cellulae 12–40 x 3–5 µm . Appressoria dispersa, unicellularis, opposita, alternata, unilateralis, antrorsa vel retrorsa, globosa vel cylindracea, integra, 5–18 x 5–8 µm . Pycnothyria dispersa, orbicularis, ad 58µm diam., stellatim dehiscentes et perlate orificium ad centro; pycnothyriosporae globosae, clavatae, 15–20 µm , parietus glabrus. Thyriothecia dispersa, orbicularis, ad 85µm diam., stellatim dehiscentes et perlate orificium ad centro et asci distinctum; asci globosi vel ovati, 37–45 µm diam.; ascosporae brunnneae, uniseptatae, constrictus ad septatum, 22– 25 x 10–13 µm , parietus glabrus. Colonies hypophyllous, thin, up to 2mm in diameter, confluent. Hyphae flexuous to crooked, branching irregular at acute to wide angles, forming closely reticulated rings, cells 12–40 x 3–5 µm . Appressoria scattered, unicellular, opposite, alternate, unilateral, antrorse to retrorse, globose to cylindrical, entire, 5–18 x 5–8 µm . Pycnothyria scattered, orbicular, up to 58µm in diameter, stellately dehisced and widely opened at the centre; pycnothyriospores globose, clavate, 15–20 µm , wall smooth. Thyriothecia scattered, orbicular, up to 85µm in diameter, stellately dehisced and widely opened at the centre by exposing asci; asci globose to ovate, 37–45 µm in diameter; ascospores brown, uniseptate, constricted at the septum, 22–25 x 10–13 µm , wall smooth. Etymology: Specific epithet based on the host genus. This species differs from Asterina micheliae Hansf. reported on Michelia nilagirica from Sri Lanka ( Hansford 1947 ) in having typical thyriothecium and differs from A. micheligena in having straight mycelium and larger ascospores. Figure 1. Asterina michelifolia sp. nov. a - apprassoriate mycelium; b - thyriothecium; c - ascus; d - ascospores; e - pycnothyriospores Images 1–5. Asterina michelifolia sp. nov. 1 - infected leaf; 2 - colony with thyriothecia; 3 - thyriothecium; 4 - asci; 5 - germinating ascospore