Atlas of hypocrealean invertebrate-pathogenic fungi of Thailand.

Hypocreales, a highly diverse fungal order, encompasses numerous families with genera exhibiting pathogenicity towards invertebrates. Our research compiles a comprehensive survey of invertebrate-pathogenic hypocrealean fungi collected in Thailand over the last two decades, representing over two hundred species. For each species, we provide detailed descriptions of macro-and microscopic morphological features, high-resolution photographic documentation, host and habitat information, and geographical distribution within Thailand. To gain a comprehensive understanding of their phylogenetic relationships, molecular phylogenetic data using combined SSU, LSU, rpb1, rpb2, and tef1 sequences were used to validate species identifications and establish phylogenetic context. Taxonomic novelties: New species: Ophiocordyceps camponoti-leonardi Kobmoo, Mongkols., Tasan., Thanakitp. & Luangsa-ard, Ophiocordyceps camponoti-saundersi Kobmoo, Mongkols., Tasan., Thanakitp. & Luangsa-ard, Ophiocordyceps polyrhachidis-furcatae Kobmoo, Mongkols., Tasan., Thanakitp. & Luangsa-ard, Petchiella hymenopterorum Mongkols., Noisrip., Jangs. & Luangsa-ard. New combinations: Hypocrella minutispora (Hywel-Jones & Mongkols.) Mongkols. & Luangsa-ard, Hypocrella narathiwatensis (Mongkols. et al.) Mongkols. & Luangsa-ard, Ophiocordyceps petchabunensis (Hywel-Jones et al.) Thanakitp., Mongkols. & Luangsa-ard, Petchiella siamensis (Thanakitp. et al.) Thanakitp., Mongkols. & Luangsa-ard, Petchiella mantidicola (Kobayasi & Shimizu) Thanakitp., Mongkols. & Luangsa-ard. Replacement name: Petchiella Thanakitp., Mongkols. & Luangsa-ard. Citation: Luangsa-ard JJ, Thanakitpipattana D, Mongkolsamrit S, Tasanathai K, Kobmoo N, Khonsanit A, Noisripoom W, Tanticharoen M (2026). Atlas of hypocrealean invertebrate-pathogenic fungi of Thailand. Studies in Mycology 114: 1-369. doi: 10.3114/sim.2026.114.01.