Hylomus rhinoceros (Likhitrakarn, Golovatch & Panha, 2015)

Nguyen, Anh D. & Sierwald, Petra, 2019, On the paradoxosomatid collection in the Field Museum of Natural History: Dragon millipedes from Laos (Polydesmida: Paradoxosomatidae: Hylomus), Raffles Bulletin of Zoology 67, pp. 119-128 : 121-123

Hylomus rhinoceros (Likhitrakarn, Golovatch & Panha, 2015)

( Figs. 1–4 )

Desmoxytes rhinoceros Likhitrakarn, Golovatch & Panha, 2015b: 486 , figs. 1A, B & 2–4.

Hylomus rhinoceros: Srisonchai et al., 2018a: 11 (transferred to Hylomus ).

Material examined. 1 male, 2 females ( FMNH-INS 3716298 ), LAOS, Champasak Prov., Bolaven Plateau, Ban Thongvay [=Xekatam], vic. old logging road, N of village, 1,170 m, 15°14.494′N – 106°31.807′E, selectively logged forest, FMHD#2008–040 , flight intercept trap, coll. A Newton & M. Thayer, ANMT site 1232, 8–16 June 2008 ; 1 male, 2 females ( FMNH-INS 3716301 ), LAOS, Champasak Prov., Bolaven Plateau, Ban Thongvay [=Xekatam], vic. old logging road, N of village, 1,095 m, 15°14.288′N – 106°31.891′E, selectively logged forest, FMHD#2008–037 , flight intercept trap, coll. A Newton & M. Thayer, ANMT site 1231, 8–16 June 2008 ; 3 females ( FMNH-INS 072 850), LAOS, Champasak Prov., Bolaven Plateau, Ban Thongvay [=Xekatam], vic. old logging road, N of village, 1,095 m, 15°14.288′N – 106°31.891′E, selectively logged forest, FMHD#2008–039 , dung trap (human), coll. A. Solodovnikov, M. Thayer & A Newton, ANMT site 1231, 8–16 June 2008 .

Descriptive notes. Likhitrakarn et al. (2015b) described the collum of this species with three transverse rows of setiferous spines: 3+3 anterior, 3+3 intermediate and 1+1 posterior (totally 16 spines). In fact, their images ( Likhitrakarn et al., 2015b: fig. 2A) and our material clearly show the collum with 14 spines in total, arranged in three transverse rows: 3+3 anterior spines, 2+2 intermediate spines and 2+2 posterior spines.

Remarks. This species was originally described as Desmoxytes rhinoceros , but it was recently assigned to the re-validated genus Hylomus by Srisonchai et al. (2018a). The additional specimens examined here fall well within the originally reported distribution of this species in southern Laos (Champasak and Sekong provinces).

Figures

Fig. 1. Hylomus rhinoceros (Likhitrakarn, Golovatch & Panha, 2014), FMNH–INS 2858163. A, anterior part of male, dorsal view; B, sternum 5, ventral view; C, anterior part of female, dorsal view; D, lateral view. Scale bar = 1 mm.

Fig. 2. Hylomus rhinoceros (Likhitrakarn, Golovatch & Panha, 2014), FMNH–INS 2858164. A, male body rings 11–13, dorsal view; B, Male body rings 12–13, dorsal view; C, male body rings 11–13, lateral view; D, telson, ventral view. Scale bar = 1 mm.

Fig. 3. Hylomus rhinoceros (Likhitrakarn, Golovatch & Panha, 2014), FMNH–INS 2858164. A, telson, lateral view; B, dorsal view; C, gonopods in situ, ventral view, light photo; D, uv photo. Scale bar: A, B = 1 mm; C, D = 0.5 mm.

Fig. 4. Hylomus rhinoceros (Likhitrakarn, Golovatch & Panha, 2014), FMNH–INS 2858163. A, right gonopod, mesal view; B, subdorsal view; C, ventral view; D, distal part of right gonopod, mesal view; E, ventral view. Scale bar = 200 µm.