Hyleoglomeris differens, Golovatch & Geoffroy & Mauriès, 2006

Golovatch, Sergei I., Geoffroy, Jean-Jacques & Mauriès, Jean-Paul, 2006, Review of the millipede genus Hyleoglomeris Verhoeff, 1910 (Diplopoda, Glomerida, Glomeridae), with descriptions of new species from caves in Southeast Asia, Zoosystema 28 (4), pp. 887-915 : 904-906

Hyleoglomeris differens n. sp.

( Fig. 11 )

TYPE MATERIAL. — Laos. Khammouan Province, Ban Thongkha, Tham Non , cave, hand collection, 15.II.1998, leg. L. Deharveng & A. Bedos, holotype ♂ ( MNHN CC159 ) ; paratypes 1 ♂, 3 ♀♀ ( MNHN CC159 ) .

ETYMOLOGY. — To emphasize the sharp differences from the parapatric H. sulcostriata n. sp., as well as the numerous striae on the thoracic shield, among which only few cross the dorsum.

DIAGNOSIS. — Differs from congeners in some troglomorphic traits, combined with a high number of striae on the thoracic shield, among which only few cross the dorsum.

DESCRIPTION

Length 6.5-7.0 (♂) or 6.0- 7.8 mm (♀), width 3.4-4.0 (♂) or 3.2-4.2 mm (♀). Holotype 7.0 mm long and 4.0 mm wide.

Coloration nearly entirely pallid, but with marbled red-brown sides of head around Tömösváry’s organ and with blackish ocelli.

Antennomere 6 about 2 times longer than wide, antennomere 7 very short; 6 + 1 convex ocelli on each side of head; Tömösváry’s organ transverseoval, about twice as wide as long.

Collum with two transverse striae.

Thoracic shield with a very narrow hyposchism barely surpassing the caudal tergal contour; 10- 13 transverse striae, of which most start above the schism but only 3 (usually) or 4 (seldom, holotype), neither the first nor the last though, cross the dorsum.

Male pygidium virtually not sinuate medially at caudal margin.

Male leg 17 ( Fig. 11A ) with a modest, rounded, outer coxal lobe; telopodite 4-segmented.

Male leg 18 ( Fig. 11B ) with a broadly rounded syncoxital notch; telopodite 4-segmented.

Telopods ( Fig. 11C ) with a rather small, roundly subtriangular syncoxital lobe flanked by two setose horns crowned with a subapical setoid. Prefemur and, to a lesser degree, femur micropapillate laterally. Caudomedial outgrowth of femur wide at base, pilose on caudal surface; that of tibia with a pilose tubercle at base. Tarsus narrowly rounded apically.

REMARKS

The relations of H. differens n. sp. are difficult to determine, as only few congeners, like H. electa in the sense of Attems (1938), show a small body size, combined with a high number of striae on the thoracic shield and a contrastingly low number of those that cross the dorsum. However, none of these other species possesses definite traits of troglomorphism, such as a completely unpigmented body and an only partly pigmented head. Based on this latter character alone, this new species can only be considered as a troglophile at most.

Figures

FIG. 11. — Hyleoglomeris differens n. sp., ♂ paratype: A, leg 17; B, leg 18; C, telopod, caudal view. Scale bar: 0.4 mm.