A revision of dragon millipedes III: the new genus Gigaxytes gen. nov., with the description of three new species (Diplopoda, Polydesmida, Paradoxosomatidae) Author Srisonchai, Ruttapon 4C9CB546-0A3E-4F0B-A9AB-618A6E9C2D6B Biological Sciences Program, Faculty of Science, Chulalongkorn University, Phaya Thai Road, Patumwan, Bangkok 10330, Thailand. Natural History Museum of Denmark, University of Copenhagen, Universitetsparken 15, DK- 2100 København Ø, Denmark. Division of Plant Protection, Faculty of Agricultural Production, Maejo University, San Sai, Chiang Mai 50290, Thailand. Animal Systematics Research Unit, Department of Biology, Faculty of Science, Chulalongkorn University, Phayathai Road, Patumwan, Bangkok 10330, Thailand. ruttapon60104@yahoo.com Author Enghoff, Henrik 9B9D901F-D6C8-4BCA-B11B-CF6EE85B16DC somsak.pan@chula.ac.thandhenghoff@snm.ku.dk Author Likhitrakarn, Natdanai 46C52EE1-A383-4C86-BF97-39E07C195075 kongerrrr@hotmail.com Author Panha, Somsak AC935098-D901-4F35-A414-4B0D4FE44E79 somsak.pan@chula.ac.thandhenghoff@snm.ku.dk text European Journal of Taxonomy 2018 2018-09-27 463 1 43 journal article 28901 10.5852/ejt.2018.463 6c71c062-4867-4d9d-a267-871140b8dd35 1467258 0A1234C2-BE04-4EFE-9EB7-8F91E8485327 Key to species of Gigaxytes gen. nov. (based mainly on males) 1. Male femora 5, 6, 7 without modification ( Fig. 10 E–F) ..................................................................... ................................................................. G. gigas ( Golovatch & Enghoff, 1994 ) gen. et comb. nov. – Male femora 5, 6 or 5, 6, 7 with an apophysis (e.g., Fig. 15 E–G) ................................................... 2 2. Body brown. Only male femora 5 and 6 with apophyses ( Fig. 5 E–F); solenophore narrow laterally (e.g., Figs 7 C–D, 8C, E) ............................... G. fusca Srisonchai, Enghoff & Panha gen. et sp. nov. – Body pinkish brown or brownish pink. Male femora 5, 6 and 7 with apophyses ( Figs 15 E–G, 20E– G); solenophore (sph) broad laterally (e.g., Figs 17C , 18C , 22C , 23C ) ........................................... 3 Fig. 5. Gigaxytes fusca Srisonchai, Enghoff & Panha gen. et sp. nov. , ³ paratype. A . Anterior body part. B . Body rings 8–10. C . Posteriormost body rings and telson. D . Head and antenna. E . ♂ leg 5 (right). F . ♂ leg 6 (right). G . ♂ leg 13 (right). H . Midbody ring. 3. Paraterga short ( Fig. 16 A–B); collum usually with 3+3 cones/spines (intermediate row) ( Fig. 15A ); metaterga 2–8 usually with 4+4 cones/spines (anterior row), 3+3 cones/ spines (intermediate row) and 3+3 cones/spines (posterior row); metaterga 9–19 usually with 5+5 cones/spines (anterior row), 5+5 cones/spines (intermediate row) and 5+5 cones/spines (posterior row) ( Fig. 15 A– C) ......................................................... G. parvoterga Srisonchai, Enghoff & Panha gen. et sp. nov. – Paraterga long ( Fig. 21 A–B); collum usually with 4+4 cones/spines (intermediate row) ( Fig. 20A ); metaterga 2–8 usually with 4+4 cones/spines (anterior row), 4+4 cones/ spines (intermediate row) and 4+4 cones/spines (posterior row); metaterga 9–12 usually with 5+5 cones/spines (anterior row), 5+5 cones/spines (intermediate row) and 5+5 cones/spines (posterior row); metaterga 13–19 usually with 6+6 cones/spines (anterior row), 6+6 cones/ spines (intermediate row) and 6+6 cones/spines (posterior row) ( Fig. 20 A–C) ................ G. suratensis Srisonchai, Enghoff & Panha gen. et sp. nov.