A review and notes on the phylogenetic relationship of the centipede genus Otostigmus Porat, 1876 (Chilopoda: Scolopendromorpha: Scolopendridae) from Vietnam Author Vu, Ha T. Department of Biology, Graduate School of Science, Tokyo Metropolitan University, JAPAN. Author Nguyen, Hung D. Faculty of Biology, Hanoi National University of Education, 136, Xuan Thuy Str., Caugiay District, Hanoi, VIETNAM. hungnd 2000 @ gmail. com; https: // orcid. org / 0000 - 0002 - 5454 - 0956 Author Le, Son X. Institute of Tropical Ecology, Vietnamese-Russian Tropical Center, 2 Nguyen Van Huyen Str., Cau Giay District, Hanoi, VIETNAM. lesonenv 86 @ yahoo. com; https: // orcid. org / 0000 - 0003 - 1648 - 6773 Author Eguchi, Katsuyuki Department of Biology, Graduate School of Science, Tokyo Metropolitan University, JAPAN. & antist 2007 @ gmail. com; https: // orcid. org / 0000 - 0002 - 1054 - 1295 Author Nguyen, Anh D. Institute of Ecology and Biological Resources, Vietnam Academy of Science and Technology, 18, Hoangquocviet Rd., Cau Giay District, Hanoi, VIETNAM. ducanh @ iebr. ac. vn; https: // orcid. org / 0000 - 0001 - 9273 - 0040 & Center for Research and Technology Transfer, Vietnam Academy of Science and Technology, 18, Hoangquocviet Rd., Cau Giay District, Hanoi, VIETNAM. Author Tran, Binh T. T. Faculty of Biology, Hanoi National University of Education, 136, Xuan Thuy Str., Caugiay District, Hanoi, VIETNAM. hungnd 2000 @ gmail. com; https: // orcid. org / 0000 - 0002 - 5454 - 0956 text Zootaxa 2020 2020-07-03 4808 3 401 438 journal article 10.11646/zootaxa.4808.3.1 1175-5326 3933160 15876EA8-DC4E-456C-82CF-21E1DA2479F1 Genus Otostigmus Porat, 1876 Type species: Otostigmus carinatus Porat, 1876 , by subsequent designation (Pocock, 1891a: 229). Remarks . Edgecombe & Bonato (2011) stated that the genus is recognized by the sensilla coeloconica on clypeal part of epipharynx organized as a pair of lateral clusters; spiracles round or ovate, their long axis generally oriented vertically; floor of spiracular atrium usually raised into humps; border between labral and clypeal part of epipharynx strongly curved forwards; forcipular coxosternite with tooth-plates; leg tibia and tarsi with spurs, the latter sometime in pairs; testicular vesicles oriented oblique to central deferens duct. Most importantly, this genus is distinguished from other its congeners by the leg-bearing segment 7 lacking spiracles. The genus is currently divided into three subgenera distinguished by the presence ( Otostigmus ) or absence ( Dactylotergitius and Parotostigmus ) of spines on the ultimate leg prefemur. About 120 Otostigmus species have been described and are widely distributed worldwide (Edgecombe & Bonato in Minelli 2011 ). The subgenus Otostigmus comprises 58 species ( Lewis 2010 ) or 60 (Edgecombe & Bonato in Minelli 2011 ) distributed in Africa and the Indo-Australian region. The subgenus Otostigmus is distinguished from the two other subgenera by having spines on the ultimate leg prefemur and coxopleural process with apical spines. All currently known species in Vietnam belong to the subgenus Otostigmus .