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. & 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 Natural History Museum of Denmark, University of Copenhagen, Universitetsparken 15, DK- 2100 København Ø, Denmark. somsak.pan@chula.ac.th Author Likhitrakarn, Natdanai 46C52EE1-A383-4C86-BF97-39E07C195075 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. kongerrrr@hotmail.com Author Panha, Somsak AC935098-D901-4F35-A414-4B0D4FE44E79 Animal Systematics Research Unit, Department of Biology, Faculty of Science, Chulalongkorn University, Phayathai Road, Patumwan, Bangkok 10330, Thailand. henghoff@snm.ku.dk&somsak.pan@chula.ac.th text European Journal of Taxonomy 2018 2018-09-27 463 1 43 journal article 10.5852/ejt.2018.463 6c71c062-4867-4d9d-a267-871140b8dd35 2118-9773 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.