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 Cryptovalsa suaedicola Spooner ( Fig. 11 ) Transactions of the British Mycological Society 76 (2): 269 (1981) . MATERIAL EXAMINED. — United Kingdom , Colne Point Nature Reserve, in salt marsh, on twigs of Suaeda fruticosa amongst lichens Xanthoriaparietina and Lecanora dispersa , N. Essex , 13.VII.1976 , J. F. Skinner (holo-, IMI[IMI-1399939]). DISTRIBUTION. — United Kingdom . DESCRIPTION Sexual morph Stromata. 0.9-1.5 mm diam., well developed, visible as black spots on host surface, substratum blackened around the stromata and with a depressed zone between them. Ascomata. 370-350 × 290-350 µm, flask-shaped, immersed, 1-3 within one stroma, evenly scattered in a single layer in a widespread entostroma in the surface layers of the host tissue, black, the ostioles protruding and bearing 4 vertical furrows. Peridium. 35-40 µm wide, composed of 8-9 layers of prismatic cells, the outermost cells dark brown and thick walled, becoming paler inwards. A thickened ring of tissue composed of thick walled dark brown cells is present immediately below the ostiolar neck. Paraphyses. 1-2 µm wide, filiform, usually branched, hyaline, containing a row of small guttules. Asci. 80-130 × 6-7.5 µm (ẍ = 105 × 6.5 µm, n = 20), cylindric-fusoid, tapered in the upper part to a rounded apex, and below to a narrow, stipe-like base, rather thickwalled above, apical apparatus diffusely and weakly amyloid, polysporous. Ascospores. 4-6 × 1-1.5 µm (ẍ = 5 × 1 µm, n = 30), allantoid, non-septate, individually appearing hyaline but greenish in mass within the ascus. Asexual morph Undetermined. NOTES Cryptovalsa suaedicola reported from temperate Suaeda occurred on twigs associated with lichens and probably occurred above the intertidal region ( Spooner 1981 ). The species is unique by the wide-spreading eutypoid ascostroma, separate, immersed perithecia with a neck bearing four vertical furrows and polysporous asci. However, C. effusa on stems of Rosa canina in Europe ( Berlese 1905 ) appears very similar to this species in possessing solitary perithecia. Cryptovalsa suaedicola differs particularly in possessing larger ascospores from other marine Cryptovalsa species ( Spooner 1981 ) . Four vertical furrows of the ascomatal neck is the most useful characteristic to differentiate this species from all other morphologically similar diatrypaceous species from marine based habitats, such as, C. halosarceicola , C. mangrovei , Halocryptovalsa avicenniae , comb. nov. , and Hcr. salicorniae ( Table 4 ). Lack of sequence data for this species may lead to taxonomic confusion when determining whether to accommodate this species within the new genus Halocryptovalsa Dayarathne & K.D.Hyde , gen. nov.