taxonID	type	description	language	source
287287F2FFD33326DF1D1978FDCB8590.taxon	diagnosis	Diagnosis The genus can be distinguished from other genera in the tribe Sulciferini by the combination of characters: paraterga being well-developed; metaterga with one or two rows of setae; legs without tarsal brushes; 5 th sternum without modifcations. Gonopod relatively complicated; femorite weakly twisted, slightly or strongly enlarged distally, strongly grooved mesally, well demarcated laterally from postfemoral lamina l by a distinct sulcus; solenophore with two basal processes: long, highly elevated process h and short, spiniform / tuberculiform, subtransverse process z; solenophore twisted or strongly spiral, with mesal well-developed lobule, but without lateral lobules; solenomere Fagelliform, completely sheathed by solenophore.	en	Anh D. Nguyen, Zoltán Korsós, Kuem-Hee Jang, Ui-Wook Hwang (2017): A revision and phylogenetic analysis of the millipede genus Oxidus Cook, 1911 (Polydesmida, Paradoxosomatidae). European Journal of Taxonomy 293: 1-22, DOI: 10.5852/ejt.2017.293
287287F2FFD33326DF1D1978FDCB8590.taxon	discussion	Remarks This genus is distributed in the northern part of the Oriental and the eastern part of the Palearctic regions. It is unlikely that the genus is of tropical origin because it is absent from the tropical regions in the Oriental (Jeekel 1963 a). Its center of origin is more likely to be Japan (Jeekel 1968). The genus Oxidus was placed in Sulciferini in view of the characters of the spiral solenophore completely sheathing the solenomere, the presence of a postfemoral demarcation and of postfemoral processes (Jeekel 1968). Golovatch & Enghoff (1993) recommended that the genus should be placed relatively close to the genus Tylopus Jeekel, 1968, rather than to other sulciferinine genera. The phylogeny of the genus Oxidus is discussed below.	en	Anh D. Nguyen, Zoltán Korsós, Kuem-Hee Jang, Ui-Wook Hwang (2017): A revision and phylogenetic analysis of the millipede genus Oxidus Cook, 1911 (Polydesmida, Paradoxosomatidae). European Journal of Taxonomy 293: 1-22, DOI: 10.5852/ejt.2017.293
287287F2FFD23324DF2D1C9BFDE787F8.taxon	description	Figs 1 – 2	en	Anh D. Nguyen, Zoltán Korsós, Kuem-Hee Jang, Ui-Wook Hwang (2017): A revision and phylogenetic analysis of the millipede genus Oxidus Cook, 1911 (Polydesmida, Paradoxosomatidae). European Journal of Taxonomy 293: 1-22, DOI: 10.5852/ejt.2017.293
287287F2FFD23324DF2D1C9BFDE787F8.taxon	materials_examined	Material examined JAPAN: 1 ♂, Central Ryukyus, Okinawa-jima Island, Onna-son, Onna, Camp Hansen training area at Gate 28, 20 m a. s. l., 26 ° 29 ′ 44 ″ N, 127 ° 51 ′ 36 ″ E, 31 Aug. 2010, leg. Z. Korsós (IEBR- 501); 3 ♂♂, 3 ♀♀, Central Ryukyus, Okinawa-jima, Okuni rindo forest trail, 26 ° 43 ′ 55 ″ N, 128 ° 12 ′ 30 ″ E, 25 Sep. 2012, leg. Z. Korsós (IEBR-H 471); 3 ♂♂, 3 ♀♀, Central Ryukyus, Okinawa-jima, Nago city, Makiya, Makiya-notaki waterfall, 26 ° 37 ′ 44 ″ N, 128 ° 02 ′ 42 ″ E, 100 m, 2 Sep. 2012, leg. Z. Korsós (IEBR-H 466). USA: 13 ♂♂, 5 ♀♀, Florida, Columbia, Co., Ichetucknee St., PK, 3 May 1981 (IEBR-USA). SOUTH KOREA: 4 ♀♀ (IPE-Myr 001), 1 ♂, Geoje Island, 8 Aug. 1970, leg. K. Y. Paik (IPE-Myr 003); 7 ♀♀, Geoje Island, 7 Aug. 1970, leg. K. Y. Paik (IPE-Myr 002); 1 ♂, Jeollanam-do, Gwangju, 6 Oct. 1962, leg. S. C. Kim (IPE-Myr 004); 4 ♂♂, Songnisan National Park, 24 Jul. 1961, leg. G. Y. Baek (IPE- Myr 005); 1 ♂, Gyeongsangbuk-do, Cheongsong-gun, Hyeondong-myeon, Wolmae-ri, 18 Jul. 1966, leg. Kim Jae Ho (IPE-Myr 007); 3 ♂♂, 3 ♀♀, leg. K. Y. Paik (IPE-Myr 009). TAIWAN: 1 ♂, Miaoli County, Taian Township, Kuanwu, SE ridge of Mt. Yemagan, 24 ° 31 ′ 13 ″ N, 121 ° 07 ′ 11 ″ E, 1925 m, secondary mixed forest, 20 Oct. 2009, leg. L. Dányi and E. Lazányi (HNHM-T 09 - 51); 1 ♂, 1 ♀, Taichung County, Heping Township, Dasyueshan Forest Recreation Areas, 10 Shsuehshan Rd., 7 May 2003, leg. Shining Wu (IEBR-Myr 550); 3 ♂♂, 1 ♀, Miaoli County, Taian Township, Dalu Forest Rf., West Feeder, Guanwu lodge, 12 Aug. 2002, leg. Chen Chao Chun (IEBR- Myr 551).	en	Anh D. Nguyen, Zoltán Korsós, Kuem-Hee Jang, Ui-Wook Hwang (2017): A revision and phylogenetic analysis of the millipede genus Oxidus Cook, 1911 (Polydesmida, Paradoxosomatidae). European Journal of Taxonomy 293: 1-22, DOI: 10.5852/ejt.2017.293
287287F2FFD23324DF2D1C9BFDE787F8.taxon	diagnosis	Diagnosis This species differs from its congeners in the gonopod femorite being strongly expanded distally, not cylindrically slender; postfemoral lamina l rectangular; spine z pointed tuberculiform; process h lamellar, slightly suberect, but bent upwards from midpart, serrated at distolateral part; both bases of process h and spine z clearly separated; mesal lobule of solenophore very well-developed, lamella-shaped, distinctly separated from tip of solenophore; tips of both mesal lobule and solenophore circularly emarginated.	en	Anh D. Nguyen, Zoltán Korsós, Kuem-Hee Jang, Ui-Wook Hwang (2017): A revision and phylogenetic analysis of the millipede genus Oxidus Cook, 1911 (Polydesmida, Paradoxosomatidae). European Journal of Taxonomy 293: 1-22, DOI: 10.5852/ejt.2017.293
287287F2FFD23324DF2D1C9BFDE787F8.taxon	description	DNA For Oxidus gracilis, DNA data was collected for three genes (mitochondrial COI gene, nuclear 18 S and 28 S rRNA genes), but there is no data from the mitochondrial 16 S rRNA. In this study, two fragments of COI and 16 S were sequenced and deposited in GenBank (see Table 1).	en	Anh D. Nguyen, Zoltán Korsós, Kuem-Hee Jang, Ui-Wook Hwang (2017): A revision and phylogenetic analysis of the millipede genus Oxidus Cook, 1911 (Polydesmida, Paradoxosomatidae). European Journal of Taxonomy 293: 1-22, DOI: 10.5852/ejt.2017.293
287287F2FFD23324DF2D1C9BFDE787F8.taxon	distribution	Distribution The species is widely distributed over the world, mainly in warm temperate regions, and associated with disturbed habitats (Nguyen & Sierwald 2013). Island records for the Ryukyu Archipelago, Japan: Tanega-shima, Nakano-shima, Akuseki-jima, Takara-jima, Amami-O-shima, Okinoerabu-shima, Yoron-to, Okinawa-jima, Senaga-jima, Miyagi-jima, Iheya-jima, Izena-jima, Ie-jima, Kudaka-jima, Tsuken-jima, Yakabi-jima, Tokashiki-jima, Tonaki-jima, Aguni-jima, Kume-jima, Miyako-jima, Ikemajima, Ishigaki-jima, Iriomote-jima, Kohama-jima, Taketomi-jima, Aragusuku-jima, Hateruma-jima, Yonaguni-jima, Minami-Daito-jima.	en	Anh D. Nguyen, Zoltán Korsós, Kuem-Hee Jang, Ui-Wook Hwang (2017): A revision and phylogenetic analysis of the millipede genus Oxidus Cook, 1911 (Polydesmida, Paradoxosomatidae). European Journal of Taxonomy 293: 1-22, DOI: 10.5852/ejt.2017.293
287287F2FFD03329DF0C1955FE508750.taxon	description	Figs 3 – 4	en	Anh D. Nguyen, Zoltán Korsós, Kuem-Hee Jang, Ui-Wook Hwang (2017): A revision and phylogenetic analysis of the millipede genus Oxidus Cook, 1911 (Polydesmida, Paradoxosomatidae). European Journal of Taxonomy 293: 1-22, DOI: 10.5852/ejt.2017.293
287287F2FFD03329DF0C1955FE508750.taxon	diagnosis	Diagnosis This species is particularly similar to Oxidus gracilis (C. L. Koch, 1847) in body appearance and gonopod conformation, but differs in larger size and in details of gonopod structure: process h narrow and long, pointed at the end and not serrated at distolateral margin; bases of process h and spine z less distinctly separated.	en	Anh D. Nguyen, Zoltán Korsós, Kuem-Hee Jang, Ui-Wook Hwang (2017): A revision and phylogenetic analysis of the millipede genus Oxidus Cook, 1911 (Polydesmida, Paradoxosomatidae). European Journal of Taxonomy 293: 1-22, DOI: 10.5852/ejt.2017.293
287287F2FFD03329DF0C1955FE508750.taxon	materials_examined	Material examined VIETNAM: 1 ♂, 1 ♀, Lao Cai Prov., Sa Pa, Ham Rong Mts., limestone mountain, 1600 m, 16 Jul. 2006, Anh D. Nguyen, IEBR- 113; 1 ♂, 6 ♀♀ (IEBR-Myr 516), 7 ♀♀ (IEBR-Myr 517), Ha Giang Prov., Bac Quang Distr., Duc Xuan Commune, Na Po village, limestone forest, under logs, 14 − 15 Apr. 2013, leg. Anh D. Nguyen; 1 ♂, 3 ♀♀, Vinh Phuc Prov., Tam Dao National Park, forest, 900 − 1000 m, Mar. 2012, leg. Hoang Long, IEBR-Myr 518; 2 ♂♂, 1 ♀, Lao Cai Prov., Co xan, in and around a cave, 1971, leg. Gy. Topál & I. Matskási, IEBR-H 133.	en	Anh D. Nguyen, Zoltán Korsós, Kuem-Hee Jang, Ui-Wook Hwang (2017): A revision and phylogenetic analysis of the millipede genus Oxidus Cook, 1911 (Polydesmida, Paradoxosomatidae). European Journal of Taxonomy 293: 1-22, DOI: 10.5852/ejt.2017.293
287287F2FFD03329DF0C1955FE508750.taxon	description	Redescription SIZE. Body length 31 − 34.5 mm (♂♂), 29.9 − 30.2 mm (♀); width of midbody pro- and metazonae 1.9 − 2.2 mm (♂), 2.2 mm (♀) and 2.8 − 3.2 mm (♂), 3.1 − 3.2 mm (♀), respectively. COLORATION. Generally castaneous brown, but anterior half of metaterga and posterior margin of prozonae darkish brown. Posterior half of metaterga, anterior margin of prozonae and pleura castaneous brown; paraterga, sterna and legs brownish yellow. HEAD. Slightly narrower than collum; labrum sparsely setose; epicranial suture distinct, dividing frons into two equal parts. Antennae long and slender, not claviform, reaching segment 3 if stretched posteriorly. Antennomere 1 <7 << 2 = 3 = 4 = 5 = 6 in length. COLLUM. Subequal to, or slightly narrower than collum, trapeziform; surface shining and smooth, without rugosity; setae broken, but traces of two rows: 3 + 3 close to anterior margin and 1 + 1 in middle. Paraterga large, ear-shaped with broadly rounded laterocaudal corners; lateral side with a setiferous incision. In width, segment 4 ≤ 3 <2 <5 – 17, thereafter gradually tapering towards telson. Prozonae and metaterga shining, smooth, without rugosity. Metaterga with two rows of setae: 2 + 2 close to anterior margin and 2 + 2 close to posterior margin. Transverse sulcus starting on metatergum 4, well developed, reaching base of paraterga on metaterga 5 − 19, beaded at bottom on some caudal segments. Stricture between pro- and metazonae clearly distinct, broad and striolate at bottom. Pleura shining, smooth; pleurosternal carinae completely absent or poorly developed only on pre-gonopodal segments. PARATERGA. Well developed, lying subequal to or lower than metatergal surface. Calluses small, but obvious; lateral side with 2 setiferous incisions at ⅓ and ⅔ of its length. Anterior corner broadly rounded, but posterior corner acute, produced into a pointed projection on segments 15 − 17. Ozopores located behind second lateral incision of paraterga 5, 7, 9, 10, 12, 13, 15 – 19. EPIPROCT. Long, but broadly truncated, dorsoventrally Fattened, with two minute apical tubercles. Tip with four spinnerets. Hypoproct trapeziform, with two well separated, distolateral, setiferous knobs. STERNA. Modestly setose, without modifcations, but with a minute cone caudally near each coxa. LEG. Long and slender, about 1.6 − 1.7 (♂), 1.4 − 1.5 (♀) times as long as midbody height. Tarsal brushes absent. Prefemora not swollen. Femora without modifcations. GONOPOD. Relatively complicated. Coxite cylindrical, long, subequal to femorite in length; distoventral part sparsely setose. Prefemorite densely setose, separated laterally from femorite by a distinct oblique sulcus. Femorite weakly twisted, grooved mesally, more or less slightly enlarged distally, without modifcations and demarcated from postfemoral region by a lateral sulcus. Postfemoral region shorter than femorite, with a lateral sub-pentagonal lamina l; spine z pointed; process h long and pointed, not serrated laterally; bases of process h and spine z not separated. Solenophore strongly spiral; distomesal lobule well developed and distinctly separated from solenophore tip. Solenomere Fagelliform, completely sheathed by solenophore. DNA COI and 16 S barcode data (partial) are deposited in GenBank (Table 1).	en	Anh D. Nguyen, Zoltán Korsós, Kuem-Hee Jang, Ui-Wook Hwang (2017): A revision and phylogenetic analysis of the millipede genus Oxidus Cook, 1911 (Polydesmida, Paradoxosomatidae). European Journal of Taxonomy 293: 1-22, DOI: 10.5852/ejt.2017.293
287287F2FFD03329DF0C1955FE508750.taxon	biology_ecology	Habitats All material was found under leaf-litter, logs and decaying wood.	en	Anh D. Nguyen, Zoltán Korsós, Kuem-Hee Jang, Ui-Wook Hwang (2017): A revision and phylogenetic analysis of the millipede genus Oxidus Cook, 1911 (Polydesmida, Paradoxosomatidae). European Journal of Taxonomy 293: 1-22, DOI: 10.5852/ejt.2017.293
287287F2FFD03329DF0C1955FE508750.taxon	distribution	Distribution The species has only been recorded from northern Vietnam (Lao Cai, Ha Giang and Vinh Phuc Provinces).	en	Anh D. Nguyen, Zoltán Korsós, Kuem-Hee Jang, Ui-Wook Hwang (2017): A revision and phylogenetic analysis of the millipede genus Oxidus Cook, 1911 (Polydesmida, Paradoxosomatidae). European Journal of Taxonomy 293: 1-22, DOI: 10.5852/ejt.2017.293
287287F2FFD03329DF0C1955FE508750.taxon	discussion	Remarks Attems (1953) proposed a new subspecies Kalorthomorpha gracilis gigas with a short note. Enghoff et al. (2004) raised this subspecies to full rank as Oxidus gracilis, and also showed minor differences in size and gonopod process h. The species is fairly similar to O. gracilis, but the molecular data has provided strong evidence to separate the species. Golovatch (1984) misidentifed O. gracilis in Vietnam (sample IEBR-H 133), which is currently corrected as O. gigas in this paper.	en	Anh D. Nguyen, Zoltán Korsós, Kuem-Hee Jang, Ui-Wook Hwang (2017): A revision and phylogenetic analysis of the millipede genus Oxidus Cook, 1911 (Polydesmida, Paradoxosomatidae). European Journal of Taxonomy 293: 1-22, DOI: 10.5852/ejt.2017.293
287287F2FFDD3328DF331EDBFDAB8659.taxon	description	Figs 5 – 7	en	Anh D. Nguyen, Zoltán Korsós, Kuem-Hee Jang, Ui-Wook Hwang (2017): A revision and phylogenetic analysis of the millipede genus Oxidus Cook, 1911 (Polydesmida, Paradoxosomatidae). European Journal of Taxonomy 293: 1-22, DOI: 10.5852/ejt.2017.293
287287F2FFDD3328DF331EDBFDAB8659.taxon	materials_examined	Material examined JAPAN: 4 ♂♂, 4 ♀♀, Central Ryukyus, Okinawa-jima, Ogimi village, Nerome, above road no. 58, 26 ° 41 ′ 37 ″ N, 128 ° 06 ′ 43 ″ E, 37 m a. s. l., 25 Sep. 2012, leg. Z. Korsós (IEBR-H 470); 2 ♂♂, 2 ♀♀, Okinawa-jima, Yanbaru, Ogimi village, Nunha, Okuni rindo, 26 ° 41 ′ 10.1 ″ N, 128 ° 09 ′ 02.7 ″ E, 15 Sep. 2012, leg. Nakamura Y. (IEBR-H 500); 2 ♂♂, Central Ryukyus, Okinawa Island, Yanbaru, Kunigami village, Cape Hedo, Ginama, broad-leaved evergreen forest, 176 m, 26 ° 49 ′ 52 ″ N, 128 ° 16 ′ 20 ″ E, 5 Apr. 2011, leg. Z. Korsós (HNHM- 355); 1 ♂, Northern Ryukyus, Tokara group, Kuchino-shima Island, around Kuroshio-so guesthouse, 29 ° 59 ′ 24 ″ N, 129 ° 55 ′ 21 ″ E, 63 m, 14 Oct. 2012, leg. Z. Korsós (HNHM- 477). Other records (newly found ones underlined) JAPAN: Northern Ryukyus, Tokara Group: Kuchino-shima Island; Central Ryukyus: Okinawa-jima, Kume-jima, Iheya-jima, Aguni-jima, Zamami-jima, Aka-jima, Geruma-jima (observations by Z. Korsós).	en	Anh D. Nguyen, Zoltán Korsós, Kuem-Hee Jang, Ui-Wook Hwang (2017): A revision and phylogenetic analysis of the millipede genus Oxidus Cook, 1911 (Polydesmida, Paradoxosomatidae). European Journal of Taxonomy 293: 1-22, DOI: 10.5852/ejt.2017.293
287287F2FFDD3328DF331EDBFDAB8659.taxon	diagnosis	Diagnosis Oxidus riukiaria can be distinguished from all other species of Oxidus by its smaller size (19.3 − 20.6 mm in length, width of pro- and metazonae 1.5 − 1.8 mm and 2.1 − 2.2 mm); gonopod coxae more or less stouter and longer than femorite; femorite narrow at base, and strongly expanded towards distal end; gonopod process h hook-like, larger and getting narrower towards pointed tip, spine z small, pointed spiniform; postfemoral lamina l triangularly rounded; mesal lobule not seperated from solenophore tip, which is distinctly emarginated.	en	Anh D. Nguyen, Zoltán Korsós, Kuem-Hee Jang, Ui-Wook Hwang (2017): A revision and phylogenetic analysis of the millipede genus Oxidus Cook, 1911 (Polydesmida, Paradoxosomatidae). European Journal of Taxonomy 293: 1-22, DOI: 10.5852/ejt.2017.293
287287F2FFDD3328DF331EDBFDAB8659.taxon	description	DNA COI and 16 S barcode data (partial) are deposited in GenBank (Table 1).	en	Anh D. Nguyen, Zoltán Korsós, Kuem-Hee Jang, Ui-Wook Hwang (2017): A revision and phylogenetic analysis of the millipede genus Oxidus Cook, 1911 (Polydesmida, Paradoxosomatidae). European Journal of Taxonomy 293: 1-22, DOI: 10.5852/ejt.2017.293
287287F2FFDD3328DF331EDBFDAB8659.taxon	discussion	Remarks This species was originally described by Verhoeff (1940) in the genus Orthomorpha, but was assigned to Oxidus by Jeekel (1963 a). The taxonomic position of the species is also well supported by molecular data.	en	Anh D. Nguyen, Zoltán Korsós, Kuem-Hee Jang, Ui-Wook Hwang (2017): A revision and phylogenetic analysis of the millipede genus Oxidus Cook, 1911 (Polydesmida, Paradoxosomatidae). European Journal of Taxonomy 293: 1-22, DOI: 10.5852/ejt.2017.293
287287F2FFDD3328DF331EDBFDAB8659.taxon	distribution	Distribution South Japan (Ryukyu Islands).	en	Anh D. Nguyen, Zoltán Korsós, Kuem-Hee Jang, Ui-Wook Hwang (2017): A revision and phylogenetic analysis of the millipede genus Oxidus Cook, 1911 (Polydesmida, Paradoxosomatidae). European Journal of Taxonomy 293: 1-22, DOI: 10.5852/ejt.2017.293
287287F2FFDC332EDF0F1FE3FC7E8707.taxon	description	Fig. 8 A	en	Anh D. Nguyen, Zoltán Korsós, Kuem-Hee Jang, Ui-Wook Hwang (2017): A revision and phylogenetic analysis of the millipede genus Oxidus Cook, 1911 (Polydesmida, Paradoxosomatidae). European Journal of Taxonomy 293: 1-22, DOI: 10.5852/ejt.2017.293
287287F2FFDC332EDF0F1FE3FC7E8707.taxon	diagnosis	Diagnosis This species can be separated from all other species of Oxidus by its much darker, almost uniformly dark brown body, slender base of gonopod solenophore, more clearly and obtusely emarginated posterior edge of telson; smaller postfemoral lamina l; stouter spine z; process h more erect, slender and pointed; the base of solenophore less protruded, more strongly rounded; mesal lobule distinctly separated from rounded solenophore tip.	en	Anh D. Nguyen, Zoltán Korsós, Kuem-Hee Jang, Ui-Wook Hwang (2017): A revision and phylogenetic analysis of the millipede genus Oxidus Cook, 1911 (Polydesmida, Paradoxosomatidae). European Journal of Taxonomy 293: 1-22, DOI: 10.5852/ejt.2017.293
287287F2FFDC332EDF0F1FE3FC7E8707.taxon	discussion	Remarks The species was originally described by Verhoeff (1937) under the genus Orthomorpha, then was assigned to the genus Oxidus by Takakuwa (1954).	en	Anh D. Nguyen, Zoltán Korsós, Kuem-Hee Jang, Ui-Wook Hwang (2017): A revision and phylogenetic analysis of the millipede genus Oxidus Cook, 1911 (Polydesmida, Paradoxosomatidae). European Journal of Taxonomy 293: 1-22, DOI: 10.5852/ejt.2017.293
287287F2FFDC332EDF0F1FE3FC7E8707.taxon	distribution	Distribution South Japan (Ryukyu Islands): Ishigaki-jima, Yonaguni-jima; Taiwan.	en	Anh D. Nguyen, Zoltán Korsós, Kuem-Hee Jang, Ui-Wook Hwang (2017): A revision and phylogenetic analysis of the millipede genus Oxidus Cook, 1911 (Polydesmida, Paradoxosomatidae). European Journal of Taxonomy 293: 1-22, DOI: 10.5852/ejt.2017.293
287287F2FFD9332DDF2D1C49FED78126.taxon	description	Fig. 8 B	en	Anh D. Nguyen, Zoltán Korsós, Kuem-Hee Jang, Ui-Wook Hwang (2017): A revision and phylogenetic analysis of the millipede genus Oxidus Cook, 1911 (Polydesmida, Paradoxosomatidae). European Journal of Taxonomy 293: 1-22, DOI: 10.5852/ejt.2017.293
287287F2FFD9332DDF2D1C49FED78126.taxon	diagnosis	Diagnosis This species can be distinguished by its gonopod femorite being short, very broad gently distad; process h bent upward at tip, like a lamellar sickle; spine z small, obtuse; solenophore large, broad and simple, especially wide at its base; mesal lobule not separated from rounded solenophore tip (Takakuwa 1942 a).	en	Anh D. Nguyen, Zoltán Korsós, Kuem-Hee Jang, Ui-Wook Hwang (2017): A revision and phylogenetic analysis of the millipede genus Oxidus Cook, 1911 (Polydesmida, Paradoxosomatidae). European Journal of Taxonomy 293: 1-22, DOI: 10.5852/ejt.2017.293
287287F2FFD9332DDF2D1C49FED78126.taxon	discussion	Remarks This species was described from South Korea (Takakuwa 1942 a). Later, Chamberlin & Wang (1953) reported two ♀♀ in the collection of the American Natural History Museum (New York) from Japan. It is possible that the locality was mislabelled because they stated that those specimens were collected and deposited by Dr. Takakuwa Y. Thus, it is believed that these two ♀♀ were collected from the same locality as the species holotype (South Korea). Lim (2001) synonymized O. obtusus with O. gracilis. He argued that the two species differ only in the number of postfemoral branches, three in O. obtusus and four in O. gracilis; in his opinion, such a difference is minor and cannot be used to separate two species. With the two species O. gracilis and O. gigas, those characters are important for species delimitation. It is recommended, therefore, that Oxidus obtusus should be considered a valid species. Examination of further fresh material is needed to confrm that recommendation.	en	Anh D. Nguyen, Zoltán Korsós, Kuem-Hee Jang, Ui-Wook Hwang (2017): A revision and phylogenetic analysis of the millipede genus Oxidus Cook, 1911 (Polydesmida, Paradoxosomatidae). European Journal of Taxonomy 293: 1-22, DOI: 10.5852/ejt.2017.293
287287F2FFD9332DDF2D1C49FED78126.taxon	distribution	Distribution South Korea.	en	Anh D. Nguyen, Zoltán Korsós, Kuem-Hee Jang, Ui-Wook Hwang (2017): A revision and phylogenetic analysis of the millipede genus Oxidus Cook, 1911 (Polydesmida, Paradoxosomatidae). European Journal of Taxonomy 293: 1-22, DOI: 10.5852/ejt.2017.293
