774 Chiang Mai J. Sci. 2018; 45(2) Chiang Mai J. Sci. 2018; 45(2) : 774-783 http://epg.science.cmu.ac.th/ejournal/ Contributed Paper First Record of Platybaetis bishopi M ller-Liebenau, 1980 and Baetiella bispinosa (Gose, 1980) (Ephemeroptera: Baetidae) from Thailand Sirikamon Phlai-ngam and Nisarat Tungpairojwong* [a,b] [a] Department of Biology, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand. [b] Applied Taxonomic Research Center, Khon Kaen University, Khon Kaen 40002, Thailand. * Author for correspondence; e-mail:
[email protected] Received: 21 November 2016 Accepted: 16 June 2017 ABSTRACT Platybaetis, M ller-Liebenau, 1980 and Baetiella (Gose, 1980) are baetid mayfly nymphs of the family Baetidae. This study reports the first discovery of Platybaetis bishopi M ller-Liebenau, 1980 and Baetiella bispinosa (Gose, 1980) in Thailand, with re-examination and illustration based on the P. bishopi M ller-Liebenau, 1980 nymphs from Narathiwat province. This study’s purpose is to revise the key characteristics of, specifically, the seven Platybaetis M ller-Liebenau, 1980 species currently found. Additionally, Baetiella bispinosa (Gose, 1980) nymphs from Chiang Rai province have been recorded for the first time in this region. Keywords: Baetiella bispinosa, Platybaetis bishopi, mayflies, new record, Thailand 1. INTRODUCTION Baetidae is a mayfly family that is species in West Malaysia [6] which was also common in both standing and running waters found from China [7]. Then, P. probus and is very diverse. Approximately 100 genera M ller-Liebenau, 1980 was reported and and 900 species of baetid mayflies have been described in Sabah (East Malaysia) [8].