Two new millipede species of the genus Coxobolellus Pimvichai, Enghoff, Panha & Backeljau, 2020 (Diplopoda, Spirobolida, Pseudospirobolellidae) Author Pimvichai, Piyatida https://orcid.org/0000-0001-9765-821X Department of Biology, Faculty of Science, Mahasarakham University, Maha Sarakham 44150, Thailand piyatida_pimvichai@yahoo.com Author Enghoff, Henrik https://orcid.org/0000-0002-2764-8750 Natural History Museum of Denmark, University of Copenhagen, Universitetsparken 15, DK- 2100 Copenhagen O, Denmark Author Backeljau, Thierry https://orcid.org/0000-0002-9057-9727 Royal Belgian Institute of Natural Sciences, Vautierstraat 29, B- 1000 Brussels, Belgium & Evolutionary Ecology Group, University of Antwerp, Universiteitsplein 1, B- 2610 Antwerp, Belgium text ZooKeys 2022 2022-11-09 1128 171 190 http://dx.doi.org/10.3897/zookeys.1128.94242 journal article http://dx.doi.org/10.3897/zookeys.1128.94242 1313-2970-1128-171 634538388BCC44BF8C4C46EF32B29283 B366100BBC2056CEA8A05449D4892AC9 Genus Coxobolellus Pimvichai, Enghoff, Panha & Backeljau, 2020 Diagnosis. Differing from the other genera of Pseudospirobolellidae by having (1) the coxae of the 3rd pair of male legs with extremely large, protruding processes (in C. albiceps and C. transversalis , this condition also applies to the 4th pair of male legs), (2) the 4th and 5th leg-pairs with large, triangular coxae, (3) short process of preanal ring protruding as far as, or slightly beyond, anal valves, and (4) the posterior gonopod telopodite divided into a coxal part (pcx) and a telopodital part (pt); with opening of efferent groove (oeg) at mesal margin at the end of coxal part (pcx). Species description. The two new species share all of the diagnostic characters of the genus Coxobolellus , as described in the general description section in Pimvichai et al. (2020 : 599-601).