Two new species of the millipede genus Glyphiulus Gervais, 1847 (Diplopoda, Spirostreptida, Cambalopsidae) from caves in northern Thailand

Abstract

Two new species of the genus Glyphiulus Gervais, 1847 are described and illustrated. The first species, G. longussp. nov., is the second species of the javanicus-group to be found in Thailand. It resembles G. guangnanensis Jiang, Guo, Chen & Xie, 2018, from southern China, but is distinguished by a smaller size and the carinotaxic formula of the collum, combined with ♂ legs 1 bearing very strongly reduced telopodites, the anterior gonopods showing a pair of very long and slender apicomesal processes, and the denser plumose and stout flagella of the posterior gonopods. The second species, G. promdamisp. nov., the fifth member of the granulatus-group in Thailand, seems to be particularly similar to G. subbedosae Likhitrakarn, Golovatch & Panha, 2017, from Laos. However, it can be distinguished from the latter species mainly by showing a uniformly yellow collum and the posterior gonopod coxite bearing several strong setae in median and lateral views, coupled with the anterior gonopod coxosternum being microsetose in the anterior and medial parts in caudal view. An identification key to, and a distribution map of, all seven Glyphiulus species currently known to occur in Thailand are also provided.

Review of the millipede genus Malayorthomorpha Mršić, 1996 (Diplopoda, Polydesmida, Paradoxosomatidae), with descriptions of two new species from Thailand and a key to its species

“…Thailand is located in the central part of mainland Southeast Asia within two significant biodiversity hotspots, Indo-Burma and Sundaland (Myers et al 2000), both outstanding in supporting an especially rich and diverse diplopod fauna (Likhitrakarn et al 2011(Likhitrakarn et al , 2020Pimvichai et al 2018Pimvichai et al , 2020. To date, the Thai millipede list comprises 256 species in 52 genera, 17 families and nine orders, largely reported based on explorations during 2007-2022 throughout Thailand (e.g., Pimvichai et al 2018Pimvichai et al , 2020Srisonchai et al 2018aSrisonchai et al , b, c, d, 2021Likhitrakarn et al 2020Likhitrakarn et al , 2021aLikhitrakarn et al , b, 2022Rosenmejer et al 2021;Bhansali and Wesener 2022).…”