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Two new Ophiocordyceps species from Thailand, which belong to Ophiocordyceps nutans species complex and attack adult and nymph of stink bugs, are described: Ophiocordyceps asiana and O. tessaratomidarum. Molecular phylogenetic analyses of ITS and a combined sequence data of LSU, RPB1 and TEF1 revealed that these two new species are distinct from other known species in Ophiocordyceps nutans species complex. Based on the findings on morphological studies, they further support the naming of these two novel species. Ophiocordyceps asiana is parasitic on adult and nymph stink bugs, members of Coreidae and Pentatomidae which were recorded from China, Japan and Thailand, while O. tessaratomidarum is reported from Thailand for the first time and is only found as a parasite on adult stink bug, Tessaratoma papillosa (Tessaratomidae, Hemiptera). The fertile heads of O. asiana are shorter than reported for O. tessaratomidarum, and the colours of fertile heads producing teleomorph of these two species differs from each other by having strong reddish orange or light yellowish pink in O. asiana and pale yellow in O. tessaratomidarum. [ABSTRACT FROM AUTHOR]

Three new Ophiocordyceps species with superficial perithecia on Lepidoptera larvae are described: O. campes, O. longistromata, and O. phuwiangensis. Ophiocordyceps longistromata is characterized by long stromata and is closely related to O. campes based on morphological characters and phylogenetic position. Ophiocordyceps phuwiangensis is distinguished from closely related species by producing small ovoid superficial perithecia and multiseptate whole ascospores. Molecular phylogenies based on LSU, TEF, RPB1, and RPB2 gene loci also confirmed the distinctiveness of these new species and clustered with other specimens that produced the Hirsutella asexual morph with helical twisting of the phialide necks and are phylogenetically distinct from other known species characters in this clade. [ABSTRACT FROM AUTHOR]

Nine species in Cordycepssensulato producing orange to red stromata were discovered during diversity surveys of arthropod-pathogenic fungi in Thailand. The phylogenetic analyses of combined ITS, LSU, RPB1, RPB2 and TEF1 sequence data indicated four novel species belonging to Blackwellomyces and five novel species of Cordyceps. All Blackwellomyces species produce filiform ascospores with septations. Blackwellomyces aurantiacus and Blackwellomyces roseostromatus occur on lepidopteran larvae, and both species produce an Evlachovaea-like conidial arrangement of the anamorph and produce a red pigment that diffuses across agar medium. Blackwellomyces calendulinus and Blackwellomycesminutus are found on coleopteran larvae producing Acremonium-like and Mariannaea-like conidial arrangements of their anamorphs and do not produce any pigment. Novel members of Cordyceps include the species Cordyceps brevistroma, Cordyceps inthanonensis, Cordyceps neopruinosa, and Cordyceps parvistroma that are pathogenic on lepidopteran larvae and cocoons, whereas C. araneae is pathogenic on spiders. All Cordyceps species produce bola-shaped, whole ascospores, except for C. inthanonensis that produces ascospores dissociating into part-spores. A common feature of the novel Cordyceps species presented herein is the production of Evlachovaea-like or Mariannaea-like conidial arrangement of the anamorphs. [ABSTRACT FROM AUTHOR]

Paraisaria is distinct from Ophiocordyceps and is resurrected as a valid genus within Ophiocordycipitaceae. Multi-gene phylogenetic analyses and morphological characterization support the split of Paraisaria from Ophiocordyceps. Three new species are named from Thailand including Paraisaria orthopterorum, P. phuwiangensis, and P. yodhathaii. New species combinations are made for Ophiocordyceps amazonica, O. blattarioides, O. coenomyiae, O. gracilioides, O. gracilis, O. heteropoda, O. paramyrmicarum (= Paraisaria myrmicarum), and O. tettigonia. [ABSTRACT FROM AUTHOR]