Three new Ophiocordyceps species in the Ophiocordyceps pseudoacicularis species complex on Lepidoptera larvae in Southea
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ORIGINAL ARTICLE
Three new Ophiocordyceps species in the Ophiocordyceps pseudoacicularis species complex on Lepidoptera larvae in Southeast Asia Kanoksri Tasanathai 1 & Donnaya Thanakitpipattana 1 & Winanda Himaman 2 & Keo Phommavong 3 & Ngeun Dengkhhamounh 3 & Jennifer Luangsa-ard 1 Received: 24 May 2020 / Revised: 29 July 2020 / Accepted: 30 July 2020 # German Mycological Society and Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract 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. Keywords Entomopathogenic fungi . Hypocreales . Phylogenetics . Taxonomy
Introduction Ophiocordyceps is one of the biggest genera of entomopathogenic fungi, consisting of about 276 species (www. index Fungorum.org, April 30, 2020). The type species is Ophiocordyceps blattae Petch (1931) occurring on forest cockroaches. The majority of the species in Ophiocordyceps possesses darkly pigmented, hard, wiry, Section Editor: Marc Stadler Electronic supplementary material The online version of this article (https://doi.org/10.1007/s11557-020-01611-6) contains supplementary material, which is available to authorized users. * Jennifer Luangsa-ard [email protected] 1
National Center for Genetic Engineering and Biotechnology (BIOTEC), 113 Thailand Science Park, Phahonyothin Road, Khlong Nueng, Khlong Luang, Pathum Thani 12120, Thailand
2
Forest Entomology and Microbiology Research Group, Forest and Plant Conservation Research Office, Department of National Parks, Wildlife and Plant Conservation, 61 Phahonyothin Road, Chatuchak, Bangkok 10900, Thailand
3
Biotechnology and Ecology Institute, Thangon Road, Km 14, Dontiew Village, Xaythany District, Vientiane Capital, Laos
fibrous, or pliant stromata, with superficial to completely immersed perithecia, that are oblique or ordinally arranged in the stroma (Sung et al. 2007; Luangsa-ard et al. 2011, 2018; Kobmoo et al. 2012; Ban et al. 2015; Khonsanit et al. 2019). Known species with superficial perithecia belong to the Ophiocordyceps unilateralis clade (Sung et al. 2007). Ascospores of Ophiocordyceps are usually cylindrical with multiple septa, either disarticulating into partspores or remain whole after discharge (Ban et al. 2015; Sanjuan et al. 2015; Luangsa-ard et al. 2018; Khonsanit et al. 2019; Tasanathai et al. 2019). Known asexual morphs
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