A peer-reviewed open-access journal ZooKeys 833: 121–132 (2019)A new species of Cryptocorypha from NorthernThailand 121 doi: 10.3897/zookeys.833.32413 RESEARCH ARTICLE http://zookeys.pensoft.net Launched to accelerate biodiversity research A new species of the millipede genus Cryptocorypha Attems, 1907, from northern Thailand (Polydesmida, Pyrgodesmidae) Natdanai Likhitrakarn1, Sergei I. Golovatch2, Ruttapon Srisonchai3, Chirasak Sutcharit3, Somsak Panha3 1 Division of Plant Protection, Faculty of Agricultural Production, Maejo University, Chiang Mai 50290, Thailand 2 A.N. Severtsov Institute for Problems of Ecology and Evolution, Russian Academy of Sciences, Le- ninsky pr. 33, Moscow 119071, Russia 3 Animal Systematics Research Unit, Department of Biology, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand Corresponding author: Somsak Panha (
[email protected]); Sergei I. Golovatch (
[email protected]) Academic editor: Robert Mesibov | Received 14 December 2018 | Accepted 22 January 2019 | Published 1 April 2019 http://zoobank.org/DAC73643-A75B-4F6B-8C93-17AFA890D5F8 Citation: Likhitrakarn N, Golovatch SI, Srisonchai R, Sutcharit C, Panha S (2019) A new species of the millipede genus Cryptocorypha Attems, 1907, from northern Thailand (Polydesmida: Polydesmida: Pyrgodesmidae) ZooKeys 833: 121–132. https://doi.org/10.3897/zookeys.833.32413 Abstract The millipede family Pyrgodesmidae and the genus Cryptocorypha are recorded from Thailand for the first time, being represented there by C. enghoffi sp. n. The new species is distinguished by the evident apico- dorsal trichostele on the last tibia of both sexes and the gonopodal telopodite being particularly complex, quadripartite, consisting of the longest, mesal, suberect solenomere branch; a slightly shorter, similarly slender, acuminate endomere branch tightly appressed to the solenomere; a somewhat shorter, caudal, strongly curved, armed exomere process; and a very distinct, low, lateral, sac-shaped velum at their base.