New or otherwise interesting Lichens. VI, including a lichenicolous fungus Author Kalb, Klaus Lichenologisches Institut Neumarkt, Im Tal 12, D- 92318 Neumarkt, Germany. E-mail: klaus. kalb @ arcor. de & University of Regensburg, Institute for Botany, Universitätsstrasse 31, D- 93040 Regensburg, Germany. Author Buaruang, Kawinnat Lichen Research Unit, Biology Department, Faculty of Science, Ramkhamhaeng University, Ramkhamhaeng 24 road, Bangkok, 10240 Thailand. Author Mongkolsuk, Pachara Lichen Research Unit, Biology Department, Faculty of Science, Ramkhamhaeng University, Ramkhamhaeng 24 road, Bangkok, 10240 Thailand. Author Boonpragob, Kansri Lichen Research Unit, Biology Department, Faculty of Science, Ramkhamhaeng University, Ramkhamhaeng 24 road, Bangkok, 10240 Thailand. text Phytotaxa 2012 2012-01-25 42 35 47 http://biotaxa.org/Phytotaxa/article/view/phytotaxa.42.1.5 journal article 6120 10.11646/phytotaxa.42.1.5 4531ad17-7666-4546-9b8d-665e0fd00226 1179-3163 4894823 Melaspilea lekae Brackel & Kalb sp. nov. ( Fig. 2J ) Mycobank MB 564185 Fungus lichenicola sicut Melaspilea diplasiospora (Nyl.) Müll. Arg. , sed ascosporis minoribus et Sarcographa labyrinthica (Ach.) Müll. Arg. hospite differt. Etymology :—The new lichenicolous fungus is named in honour of Prof. Leka Manoch in recognition of her numerous contributions to Thai mycology. Type :— THAILAND . Trat Province : Muang District , near Ban Nam Chieo , in a ± disturbed mangrove forest on Sarcographa labyrinthica , ± 3 m , 12°10’25’’ N , 102°28’37’’ E , 25 February 2011 , K. Kalb & P. Mongkolsuk ( holotype RAMK , isotype hb. Kalb 38860) . Ascomata lichenicolous on thallus and ascomata of Sarcographa labyrinthica , 0.2–0.4 × 0.1–0.2 mm , lirellate to ellipsoid, occasionally branched, solitary or irregularly aggregated, superficial with an exposed, reddish brown disc, leaving a black outline when eroded. Exciple laterally carbonized, 10–18 µm thick, ± absent below the hymenium. Hymenium colourless, ca. 60 µm high, hypothecium colourless to brownish, 8–13 µm high, both KOH-, I-, K/I-. Paraphyses septate, 2–3 µm wide, not or only sparsely branched with obovate terminal cells, 4–5 µm wide, these (or the two uppermost cells) with a granular brown pigment, K–. Asci clavate, ca. 35–40 × 13–20 µm , 4–8-spored, KOH-, I-, K/I-. Ascospores 1-septate, sole-shaped, distictly constricted at the septum, finely verruculose, pale to medium brown, 14–17 × 7–8 µm . Notes :—Previously only four Melaspilea species were known to grow on Graphidaceae , namely M. diplasiospora on Graphis elegans (Borrer ex Sm.) Ach. , M. epigena Müll. Arg. on Reimnitzia santensis (Tuck.) Kalb , M. epigraphella (Nyl.) Müll. Arg. on Acanthothecis consocians (Nyl.) Staiger & Kalb and M. lentiginosa (Lyell ex Leight.) Müll. Arg. on Phaeographis dendritica (Ach.) Müll. Arg. All differ in the host and especially the ascospore dimensions. While the ascospores of M. diplasiospora are considerably larger (19.5–32 × 9.5–16 µ m) than those of M. lekae , they are smaller in M. epigena (10–12 × 5 µ m), M. epigraphella (9–11 × 3.5–4.5 µm ) and M. lentiginosa 10–13.5 (–16) × 5–7.5 µm .