Plusioglyphiulus puttakun, Golovatch & Geoffroy & Mauriès & Vandenspiegel, 2011

Golovatch, Sergei I., Geoffroy, Jean-Jacques, Mauriès, Jean-Paul & Vandenspiegel, Didier, 2011, The millipede genus Plusioglyphiulus Silvestri, 1923 in Thailand (Diplopoda, Spirostreptida, Cambalopsidae) 2940, Zootaxa 2940 (1), pp. 1-63 : 43-45

Plusioglyphiulus puttakun sp. n. Figs 39−41 .

Material examined: Holotype male ( MNHN GA 071 ), Thailand, Loei Prov., near Phu Kradung, cave 1 km away from Cave Tham Phulu , hand collection, 19 June 1987, leg. L. Deharveng & A. Bedos (THA-KK-007) . Paratypes: 2 females ( MNHN GA 071 ) , 1 female ( SEM), same locality, together with holotype .

Name: To emphasize “puttakun”, in Thai meaning “Buddha's grace”, a noun in apposition.

Diagnosis: Differs from congeners in the oligotrichous gnathochilarium, coupled with the presence of 2+2 dorsal tubercles on the epiproct, the particular carinotaxy patterns, and the special shapes and armature of both gonopod pairs (see also Key below).

Description: Coloration yellow-brown; collum, dorsum, venter and legs light yellowish to pallid; head marbled brown; metatergal crests, axial line and, especially, poriferous tubercles infuscate, brown to dark brown.

Length of holotype about 25 mm, width 1.1 mm, with 48p+2a+T. Length of female paratypes 18 or 27 mm, width 1.1 or 1.5 mm, with 47p+3a+T or 52p+2a+T, respectively. Collum broadest.

All characters as in P. panhai sp. n. ( Figs 39E , 40C, E , 41A, E, F ), except as follows. Ocellaria large, brownblackish, ovoid in shape, with about 12–19 visible ocelli arranged in 5–6 longitudinal rows. Gnathochilarium ( Figs 40B , 41B ) rather oligotrichous (n=1).

Postcollum constriction very evident, due to especially enlarged collum and segment 2 ( Figs 39A, D ). Carinotaxy formula of collum: 1p/t+2p/t+3p/t+//t+4p/t+/t+P+/ma/m ( Figs 39A, D , 40F ). Carinotaxy of metaterga 2–4, 7/ 7+m/m+7/7; usual formula of all following metaterga, 3/3+I/i+3/(3)/3+m/m/m ( Figs 39A–C , 40D ); all crests and tubercles, including poriferous cones, rather low. Midbody segments ovoid in cross-section, slightly compressed laterally ( Fig. 40D ). Epiproct dorsally with 2+2 tubercles arranged in a transverse row ( Figs 39C, F , 40A ).

Male legs 1 ( Fig. 41C ) with a usual strong central hook curved forward, appendages large, sac-shaped, poorly setose, 1-segmented. Male legs 2 strongly enlarged ( Fig. 41D ).

Anterior gonopods rather simple, with a paramedian pair of anterior coxosternal processes (cxp1), relatively low, slender, only basally contiguous, caudally sparsely setose, slightly curved, apically each rounded and carrying a distinct subterminal tooth on front face; caudal pair of coxosternal processes (cxp2) higher, also slightly curved, slenderer and more narrowly rounded; telopodites (te) digitiform, long, virtually bare, apically uncinate, slightly longer than cxp2, attached to coxal region caudolaterally, probably capable of movement ( Fig. 41G ). Posterior gonopods only slightly shorter, rather simple, coxites well separated from sternum, fused only basally, membranous, each consisting of a shorter, sac-shaped, apically fringed, frontolateral part surmounted by a large fovea, but devoid of flagella; of an unusually high, blade-shaped, middle process caudally; and of a subquadrate caudolateral lamella; evident telopodites missing ( Figs 41H, I ).

Figures

FIGURE 39. Plusioglyphiulus puttakun 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 40. Plusioglyphiulus puttakun sp. n., female paratype. A: posterior part of body, ventral view. B: gnathochilarium, ventral view. C: midbody segments, ventral view. D: cross-section of a midbody segment, caudal view. E: enlarged ozopore region, lateral view. F: collum, dorsal view. Scale bars: A and B, 0.1 mm; C, D and F, 0.2 mm; E, 0.05 mm; F, 0.01 mm.

FIGURE 41. Plusioglyphiulus puttakun sp. n., holotype. A: antenna, lateral view. B: gnathochilarium, ventral view. C: leg 1, sublateral view. D: leg 2, front view. E: leg 3, caudal view. F: midbody leg, lateral view. G: anterior gonopods, caudal view. H: posterior gonopods, front view. I: same, lateral view. te: telopodite; cxp1: anterior coxosternal process; cxp2: posterior coxosternal process. Scale bar: A–F, 0.4 mm; G–I, 0.2 mm.