The millipede genus Plusioglyphiulus Silvestri, 1923 in Thailand (Diplopoda, Spirostreptida, Cambalopsidae) 2940 Author Golovatch, Sergei I. Author Geoffroy, Jean-Jacques Author Mauriès, Jean-Paul Author Vandenspiegel, Didier text Zootaxa 2011 2011-07-05 2940 1 1 63 https://biotaxa.org/Zootaxa/article/view/zootaxa.2940.1.1 journal article 10.11646/zootaxa.2940.1.1 1175­5334 5283138 Plusioglyphiulus antiquior sp. n. Figs 5−7 . Material examined: Holotype male ( MNHN GA 075 ), Thailand , Kanchanaburi Prov. , Sai Yok Distr. , Cave Tham Sai Yok Noi , hand collection, 18 June 1986 , leg. P. Leclerc (THA-KAN-042). Paratypes : 1 female ( MNHN GA 075 ), same locality, together with holotype ; 1 male , 1 female , 1 female fragment ( MNHN GA 075 ), same locality, 15 June 1986 , leg. P. Leclerc (THA-KAN-037) . Name: To emphasize an even more basal position of this species in Plusioglyphiulus compared to the previous one. Diagnosis: Differs from congeners in the especially strongly reduced carinotaxy of the collum and metaterga resembling that of typical Glyphiulus , e.g. the absence of a transverse sulcus to set the caudal row of crests, coupled, like in the apparently most similar P. panhai sp. n. , with two, not the usual three, transverse rows of crests on the metaterga, as well as the relatively small central uncus on male leg-pair 1, the simple, plate-like anterior gonopods, and the complex posterior gonopods retaining evident telopodites. Description: Length 18–22 mm , width 1.0 mm, midbody segments being broadest. Coloration uniformly pallid to light yellow. Body with 41–50p+3–1a+T. Length of holotype about 21 mm , width 1.0 mm, with 49p+1a+T. All characters as in P. panhai sp. n. ( Figs 5B, C, E, F , 6B–D, F, G , 7A, E ), except as follows. Ocellaria invisible due to complete depigmentation. Gnathochilarium ( Fig. 7B ) not so strongly polytrichous, with a separate promentum (n=2). FIGURE 5. Plusioglyphiulus antiquior sp. n. , female paratype. A: anterior part of body, lateral view. B: midbody segments, lateral view. C: posterior part of body, lateral view. D: anterior part of body, dorsal view. E: midbody segments, dorsal view. F: posterior part of body, dorsal view. Scale bars: A–F, 0.2 mm. FIGURE 6. Plusioglyphiulus antiquior sp. n. , female paratype. A: anterior part of body, ventral view. B: midbody segments, ventral view. C: posterior part of body, ventral view. D: same, caudal view. E: cross-section of a midbody segment, caudal view. F: enlarged ozopore region, lateral view. G: enlarged claw, lateral view. Scale bars: A–E, 0.2 mm; F, 0.05 mm; G, 0.01 mm. Postcollum constriction rather evident, due to a moderately enlarged collum ( Figs 5D , 6A ). Carinotaxy formula of collum: 1+2+3p/(t)+4p/+pp/(t)+//ma ( Figs 5A, D ). Midbody segments ovoid in cross-section, almost not compressed laterally ( Fig. 6E ). Rounded pleural flaps behind gonopod aperture on male segment 7 smaller. Male legs 1 with an unusually short central hook and relatively strongly reduced, 2-segmented telopodites ( Fig. 7C ). Male legs 2 modestly enlarged, telopodite hirsute on frontal face; penes subconical, fused at base, with 2+2 long setae ( Fig. 7D ). Anterior gonopods very simple, plate-shaped, much like in typical Glyphiulus species , virtually identical to those of P. panhai sp. n. , including high and densely setose anterior coxosternal processes ( cxp ) and digitiform telopodites ( te ), but ventrolateral corners of coxosternum with far less conspicuous and more papillar lobes ( Fig. 7F ). Posterior gonopods also virtually identical to those of P. panhai sp. n. , each with an evident fovea apically, but devoid of a flagellum; telopodite ( te ) micropapillar on mesal face ( Fig. 7G ).