Hyleoglomeris aurea, Likhitrakarn, Natdanai, Golovatch, Sergei I. & Panha, Somsak, 2015

Likhitrakarn, Natdanai, Golovatch, Sergei I. & Panha, Somsak, 2015, Three new species of the pill millipede genus Hyleoglomeris Verhoeff, 1910, from northern Thailand (Diplopoda, Glomerida, Glomeridae), Zootaxa 4044 (1), pp. 130-140 : 134-135

Hyleoglomeris aurea sp. n.

Figs 3 A–C & 4.

Holotype male ( CUMZ), Thailand, Sukhothai Province, Si Samrong District, Wat Tham Rakhang, near forest, 93 m a.s.l., 17°09'51 "N 99°33'30"E, 22/10/2008, leg. C. Sutcharit and S. Panha.

Paratypes. 5 males, 2 females, 11 juveniles ( CUMZ), 1 male, 1 female ( ZMUC), 1 male, 1 female ( ZMUM ƿ2713), 1 male, 1 female ( NHMW), same locality, together with holotype.

Name. To emphasize a golden yellow body, adjective.

Diagnosis. Differs by the peculiar colour pattern which seems to be especially similar to that of H. colorata Golovatch, Geoffroy & VandenSpiegel, 2013 , from Vietnam ( Golovatch et al. 2013), but the body is considerably larger (ca 9.7–13.0 mm versus 5.0–6.0 mm long), coupled with a 4-segmented male telopodite 17 ( Fig. 4 A & B), and the higher number of ocelli (7(8)+1 versus 6+1).

Description. Length of non-stretched, but unrolled specimens ca 9.7–11.7 mm (males), 10.2–13.0 mm (females), width 5.4–6.4 (males), 5.6–6.8 mm (females).

Body bright, pattern annulated ( Fig. 3 A–C), coloration light yellowish to brown-yellowish with rather narrow, regular, contrasting brown bands across third quarter in caudal parts of terga 2–11, only terga 2 and 12 each with particularly narrow bands at caudal margin. Antennae and distal podomeres rusty brown to blackish. Ocelli blackish.

Labrum sparsely setose. Gnathochilarium with 2+2 palps of subequal length. Ocellaria blackish, ocelli 7(8)+1, cornea very concex, translucent. Antennae with four evident apical cones, segment 6 ca 2.7–3.2 times as long as high. Organ of Tömösváry oblong-oval, elongate, ca 1.4–1.6 times as long as broad.

Collum as usual, with two transverse striae. Thoracic shield with a small hyposchism field not projecting caudad behind tergal margin. Striae 8–9, mostly superficial, only lower 4–5 lying above schism, one level to schism, remaining 5 below schism, with 7–9 complete, crossing the dorsum. Terga 3 and 4 rather narrowly rounded laterally. Following terga in front of pygidium extremely faintly sinuate medially at caudal edge and with three striae starting above lateral edge, sometimes middle stria fading away towards midway. Male pygidium very faintly concave medially at caudal edge.

Male legs 17 ( Fig. 4 A & B) particularly strongly reduced, with a rather low to medium-sized, often irregularly rounded coxal lobe and a 4-segmented telopodite. Male legs 18 ( Fig. 4 C) less strongly reduced, with a more or less narrowly ogival syncoxital notch and a 4-segmented telopodite; femur with a small, setose, caudomedial tubercle (k) near apex.

Telopods ( Fig. 4 D–F) as usual, strongly incrassate, with a subtrapeziform, large, roundly emarginated syncoxital lobe flanked by two setose horns, each latter crowned by a subapical setoid filament ( Fig. 4 F). Prefemur and femur micropapillate laterally ( Fig. 4 D & E). Caudomedial femoral process prominent, subapically with a rounded subtriangular lobe on caudal face, densely setose at base ( Fig. 4 E). Caudomedial process of tibia rather evident, membranous, densely setose; tibial tubercle absent. Tarsus rather moderately sigmoid, narrowly rounded apically, with a strong terminal seta.

Remark. The localities of H. aurea sp. n. and H. colorata (Phong Nha, Vietnam) are separated from each other by ca 700 air-km.

Figures

FIGURE 3. Hyleoglomeris aurea sp. n., (A – C) male holotype; Hyleoglomeris cavicola sp. n., (D – F), D male paratype, E & F male holotype, habitus in dorsal, ventral, lateral, dorsal, dorsal and ventral views, respectively. Scale bar: 0.2 mm.

FIGURE 4. Hyleoglomeris aurea sp. n., (A & C – F) male holotype, (B) male paratype. A & B leg 17 C leg 18 D & E telopod, front and caudal views, respectively. F tip of syncoxital lobes. Scale bar: A – E 0.2 mm; F drawn not to scale.