Hyleoglomeris multistriata, Liu, Weixin & Tian, Mingyi, 2015

Liu, Weixin & Tian, Mingyi, 2015, A checklist of millipede genus Hyleoglomeris Verhoeff, 1910 in mainland China, with descriptions of seven new species (Diplopoda, Glomerida, Glomeridae), Zootaxa 4032 (1), pp. 103-116 : 112-114

Hyleoglomeris multistriata sp. n.

Figs. 8 B & 11–13.

Material examined. Holotype male ( SCAU), China, Guizhou, Tongren City, Jiangkou County, Nuxi Town, Zhengjiatun, Cave I Dong, 27°52’12.59’’N, 108°53’43.23’’E, 397 m, 30.VI.2014, leg. Tian Mingyi, Liu Weixin, Yin Haomin, Huang Sunbin, Wang Xinhui. Paratypes. 1 male, 4 females ( SCAU), same locality, together with holotype.

Etymology. To emphasize the ususually numerous striae the thoracic shield; adjective.

Diagnosis. Using the available key to the Hyleoglomeris species ( Golovatch et al. 2006, 2012), this new species is unique in showing usually three transverse striae on the collum ( Fig. 8 B), an incomplete fourth being occasionally visible, whereas the head and tegument are pigmented, the central lobe of the telopod syncoxital lobe is slightly concave apically, while a caudal lobe on the caudomedial process of telopod femur is wanting.

Description: Length of both sexes ca 5.0–6.0 mm, width 3.0–4.0 mm. Coloration marbled red-brown ( Fig. 11 ). Head and antennae light brown; antennomere 6 ca 2.0–2.5 times as long as wide ( Fig. 12 A). Ocelli at least 1+1, translucent, barely visible. Tömösváry’s organ transverse-oval, only slightly wider than long. Collum darker, with two small, rounded, paramedian brown spots ( Fig. 11 A). Thoracic shield and terga 3-10 with 1+1 medeiumsized, transverse-oval, light brown, evidently separated lateral spots ( Figs. 11 B–C). Pygidium without spot. Legs yellow to grey-yellow ( Fig. 11 A).

Collum usually with three transverse striae ( Fig. 8 B), an incomplete fourth stria occasionally visible as well. Thoracic shield with a narrow hyposchism, the latter not reaching behind caudal tergal margin ( Fig. 11 B); 13–16 transverse striae, 5–7 starting below, one level to, 6–9 above schism, 8 striae (never the last three from below) crossing the dorsum. Pygidium of both sexes sometimes regularly rounded, often slightly concave medially at caudal margin ( Fig. 11 A).

Male leg 2 ( Fig. 12 B) with a small gonopore on a caudomedially somewhat elevated coxa, without a gonapophysis; claw rather small.

Male leg 3 ( Fig. 12 C) with a rather prominent caudomedial cone on coxa, the latter with two spines on top; claw rather small.

Male leg 17 ( Fig. 13 A) with a low and rather irregularly shaped outer coxal lobe; telopodite 4-segmented.

Male leg 18 ( Fig. 13 B) with an arch-shaped syncoxital notch; telopodite 4-segmented.

Telopods ( Fig. 13 C) with a rather high, subtrapeziform, apically slightly concave, sparsely setose, central syncoxital lobe flanked by two setose horns, each latter crowned with a small rounded lobule ( Fig. 13 D). Prefemur and femur faintly micropapillate laterally. Prefemur with a well-developed frontomedial trichostele. Femur with a smaller frontomedial trichostele. Caudomedial femoral process prominent, tip with a membranous sac, devoid of a caudal lobe. Tibia with a strong distomedial seta, caudomedial process evident, tip with a very small lobe; a distinct, papillate tubercle at base on caudal face. Tarsus rather strongly sigmoid, narrowly subacuminate apically.

Remark. In this species, the pygidium of both sexes is usually irregularly, only sometimes regularly rounded, often slightly concave medially at the caudal margin. Based on the pigmented head and tegument, H. multistriata sp. n. most probably is only a troglophile.

Figures

FIGURE 11. Hyleoglomeris multistriata sp. n., male paratype. A – C. body, ventral, lateral and dorsal view, respectively. Photographed not to scale.

FIGURE 12. Hyleoglomeris multistriata sp. n., male paratype. A. antenna, front view. B. leg 2, caudal view. C. leg 3, front view. Scale bar: 0.5 mm.

FIGURE 13. Hyleoglomeris multistriata sp. n., male paratype. A. leg 17, front view. B. leg 18, front view. C. right half of telopods, front view. D. tip of syncoxital horn, front view. Scale bar: 0.5 mm.

FIGURE 8. A. collum of Hyleoglomeris variablis sp. n., male paratype. B. collum of Hyleoglomeris multistriata sp. n., male paratype. Scale bar: 0.5 mm.