Modern taxonomic approaches to identifying diatrypaceous fungi from marine habitats, with a novel genus Halocryptovalsa Dayarathne & K. D. Hyde, gen. nov. Author Dayarathne, Monika C. Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100 (Thailand) World Agroforestry Centre East and Central Asia Office, 132 Lanhei Road, Kunming 650201 (China) Laboratory for Plant Biodiversity and Biogeography of East Asia (KLPB), Kunming Institute of Botany, Chinese Academy of Science, Kunming 650201, Yunnan (China) monidaya 40 @ gmail. com (corresponding author) Author Wanasinghe, Dhanushka N. Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100 (Thailand) World Agroforestry Centre East and Central Asia Office, 132 Lanhei Road, Kunming 650201 (China) Author Devadatha, B. Biotechnology, School of Life Sciences, Pondicherry University, Kalapet, Pondicherry 605014 (India) Author Abeywickrama, Pranami Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100 (Thailand) of Plant and Environment Protection, Beijing Academy of Agriculture and Forestry Sciences (China) Author G, E. B. Author Jones, areth Author Chomnunti, Putarak Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100 (Thailand) Author Sarma, V. V. Biotechnology, School of Life Sciences, Pondicherry University, Kalapet, Pondicherry 605014 (India) Author Hyde, Kevin D. Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100 (Thailand) World Agroforestry Centre East and Central Asia Office, 132 Lanhei Road, Kunming 650201 (China) Laboratory for Plant Biodiversity and Biogeography of East Asia (KLPB), Kunming Institute of Botany, Chinese Academy of Science, Kunming 650201, Yunnan (China) Author Lumyong, Saisamorn Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200 (Thailand) Author C., Eric H. Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai Research New Zealand, Private Bag 92170, Auckland Mail Centre, Auckland 1142 mckenziee @ landcareresearch. co. nz (corresponding Author Mckenzie Thailand) (New Zealand) author) text Cryptogamie, Mycologie 2020 2020-03-27 20 3 21 67 http://dx.doi.org/10.5252/cryptogamie-mycologie2020v41a3 journal article 246324 10.5252/cryptogamie-mycologie2020v41a3 62653781-1f18-4362-a843-6dd324fe64be 1776-100X 7815042 Halodiatrype avicenniae Dayarathne & K.D.Hyde ( Fig. 15 ) Mycosphere 7 (5): 612-627 (2016) . CULTURE CHARACTERISTICS. — Colonies on PDA reaching 8 cm diam., after two weeks at 20-25°C, medium dense, irregular, slightly raised, surface smooth with undulate edge, cottony, colony from above white at the margin, yellowish white at the centre; from below yellowish white at the margin, yellow to pale brown at the centre; mycelium greenish grey, no pigmentation on PDA media. Conidiomata forming on culture media, concentrated at colony margin, appearing as black, slimy bubbles with conidial mass. MATERIAL EXAMINED. — Thailand . Phetchaburi Province , Hat Chao Samran, 47°43’30.216”E , 40°15’1.368”N 0 m a.s.l., on intertidal decayed wood of Avicennia sp. at a mangrove stand, 28.VIII.2015 , M. Dayarathne , CHAM020 (holo-, MFLU 16- 1185), ex-type living culture, MFLUCC15-0953, ICMP 21767; CHAM010 (MFLU 16-1176), ex-type living culture, MFLUCC 15-0948. — Krabi province , Tha pom Khlong Nam, 08°12’50.4”N , 98°46’42.7”E , 0 m a.s.l., on intertidal decayed wood of Avicennia sp. at a mangrove stand, 16.XII.2015 , M. Dayarathne , KLA002 (MFLU 16- 1196), ex-type living culture, MFLUCC 16-0532; KLA003 (MFLU 16-1197), ex-type living culture, MFLUCC 16- 0533. — Ranong province , Amphoe Maung, Mu 4 Tambol Ngao, Ranong Mangrove Research Center, 9°43’- 9°57’N , 98°29’- 98°39’E , 0 m a.s.l., on intertidal decayed wood of Bruguiera cylindrica at a mangrove stand, 6.XII.2016 , M. Dayarathne , MCD037 (MFLU 18-0150), ex-type living culture, MFLUCC 17-0396, ICMP 21765. DISTRIBUTION. — Thailand . DESCRIPTION Sexual morph See Dayarathne et al. (2016) . Asexual morph (On PDA after 60 days at 25°C) libertella-like, in back conidial drops. Conidia. Falcate, 26-38 × 1-2 µm (ẍ = 32 × 1.5 µm, n = 30), hyaline, 1-celled, smooth, upper end subacute, base truncate, curved to nearly semicircular. NOTES Halodiatrype avicenniae is morphologically distinguishable from H. salinicola by having aseptate, larger ascospores (45- 52 × 10-14 µm vs 7.5-8.5 × 2.5-3 µm), which are hyaline to light brown. Halodiatrype avicenniae is similar to H. mangrovei in its ascomata, asci, ascospore shape and colour ( Hyde 1993 ), but H. mangrovei has 1-4-septate ascospores, while they are aseptate in H. avicenniae . Unfortunately, there are no molecular data to compare the phylogenetic affinities of these two species. This study amends the species description by describing asexual morph characteristics of H. avicenniae . This study also reports Bruguiera cylindrica as a new host for this species.