A review of the millipede genus Pseudodesmus Pocock, 1887 (Diplopoda, Platydesmida, Andrognathidae) from Vietnam, with descriptions of five new species and notes on its phylogeny Author Nguyen, Anh D. 0000-0001-9273-0040 Institute of Ecology and Biological Resources, Vietnam Academy of Science and Technology, 18, Hoangquocviet Rd., Caugiay District, Hanoi, Vietnam & Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18, Hoangquocviet Rd., Caugiay District, Hanoi, Vietnam Author Nguyen, Lien T. P. Institute of Ecology and Biological Resources, Vietnam Academy of Science and Technology, 18, Hoangquocviet Rd., Caugiay District, Hanoi, Vietnam & Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18, Hoangquocviet Rd., Caugiay District, Hanoi, Vietnam Author Korsós, Zoltán 0000-0003-1545-5086 University of Veterinary Medicine Budapest, István u. 2, 1078 Budapest, Hungary text Zoosystematics and Evolution 2024 2024-11-07 100 4 1515 1541 journal article 305027 10.3897/zse.100.132111 6717c3bc-c84e-4604-ab36-042a63c45eac B39508EB-6EB2-4CC0-88D8-B3E87BDCED02 Pseudodesmus sp. 1 Fig. 25 Material examined. Vietnam • 02 females ; Daklak , Mdrak , Chu Mur ; 12.71233 ° N , 108.86092 ° E , 478 m a. s. l. , 15 Jul. 2019 ; Hoang Quang Duy leg.; under decaying wood along a trail ; IEBR-Myr 875 . Description. Measurements : 57 and 64 body rings (midbody width of the larger one 3.9 mm ). Collum is unique, bilobed, but also divided to anterior and posterior ridges with 5–6 + 5 – 6 small tubercles in both rows. Legs with small coxal sacs. Tubercles in two rows, medially widely separated, 2 + 2 median tubercles not especially large, anterior row with 5–6 + 5 – 7 tubercles extending to the middle / edge or paraterga, posterior row with 5–6 small tubercles. Figure 25. Pseudodesmus sp. 1 . Female ( IEBR-Myr 875 ). A – C. Habitus, dorsal view ( A ), lateral view ( B ), ventral view (C). Scale bars: 5 mm. Coloration of ethanol-preserved specimens: very strong pattern, symmetric dark brown (almost black) color extends to the paraterga as well. Dark paraterga: 2–5, 8–10, 14, 18–19, 23, 26–29, 33–34, 36–38, 41–43, 46, 50–51, 53–54, 57–58, 61–64.