Tokyosoma spinifer, Mikhaljova, Elena V., Golovatch, Sergei I. & Chang, Hseuh-Wen, 2010

Mikhaljova, Elena V., Golovatch, Sergei I. & Chang, Hseuh-Wen, 2010, The millipede family Diplomaragnidae in Taiwan, with descriptions of nine new species (Diplopoda, Chordeumatida), Zootaxa 2615, pp. 23-46 : 36-37

Tokyosoma spinifer sp. nov.

Figs 26–28 , 37 .

Material examined: Holotype: 1 male ( NMNS –6345–014), Taiwan, Miaoli County, Taian Township, Kuanwu, SE ridge of Mt Yemagan, 24°31.221’ N, 121°07.196’ E, 1925 m, secondary mixed forest, 20 October 2009, leg. L. Dányi & E. Lazányi. Paratype: 1 female ( NMNS –6345–015), same locality as in holotype, 20 October 2009, leg. L. Dányi & E. Lazányi.

Diagnosis: Differs from congeners mainly by the shape of the posterior gonopod lateral coxal branch supplied with an anterior, pointed, spiniform process, as well as in the shape of the colpocoxite with a slender distal outgrowth.

Description: Male. Length about 18 mm, width with paraterga about 1.4 mm. Coloration in alcohol brown with a pattern of marbled brown bands and spots on dorsum. Venter, lower portion of pleura, proximal parts of legs and distal parts of antennae pale. Legs with marbled brown distal parts. Ocellaria black.

Body with 32 segments. Head covered with sparse, long and short setae. Each eye patch composed of at least 26 ocelli. Collum semi-circular. Body width gradually increasing until somite 7, body parallel-sided on somites 8–17(18), thereafter gradually tapering. Beginning from somite 4, paraterga normally developed, rounded, growing increasingly less distinct towards hind part of body, strongly reduced on somites 24 and 25, absent from somites 26–31. Paraterga 2 and 3 small. Nearly all macrochaetae broken off, remaining ones in anterior part of body relatively long and pointed apically, but in middle and posterior parts of body short and blunt. Metazonites with two knobs placed near axial suture on each side and with an oblong bolster on paraterga.

Leg pairs 3–7 somewhat enlarged. Leg pairs 5–7 with a group of funnel-shaped tarsal papillae apically near claw. Claw of leg pair 5 at base only with one small additional claw dorsally. Claw of leg pair 7 at base only with a long setoid filament ventrally. Postgonopodal legs (including leg pairs 10 and 11) without tarsal papillae. Claw of leg pair 10 at base with one small additional claw dorsally and a long setoid filament ventrally. Claw of leg pair 11 at base with a long setoid filament ventrally; only left claw of leg 11 at base supplied with one small but evident additional dorsal claw, right one at base with a tiny, barely visible, additional dorsal claw dorsally. Claw of midbody and hindmost legs at base with one small additional claw dorsally and a long setoid filament ventrally.

Legs 10 and 11 with coxal glands. Coxa 10 with a caudoventral subconical process curved anteriad ( Fig. 26 ). Trochanter 10 with a small ventral outgrowth setose apically. Coxa 11 without processes. Trochanter 11 with a caudal finger-shaped process papillate mesally and rounded apically.

Anterior gonopod telopodite 1-segmented, flagelliform, beset with cuticular spinules, its distal part positioned inside sheaths with very strongly elevated and tightly closed edges (e) ( Fig. 27 ).

These sheath edges like high plates in lateral view. Telopodite base and distal part of coxosternum tightly attached to adjacent mesal portion of posterior gonopod. Posterior gonopod colpocoxites fused sub-basally, somewhat curved caudad. Colpocoxites distally with slender flat processes (c) and, laterally, with a small rounded blade (b). Mesal sheath processes of posterior gonopod colpocoxites fused medially into a single cup-shaped structure (ms) covered with long pointed spinules. Lateral sheath processes of colpocoxites (lp) cup-shaped, carrying pointed spinules caudally.

Posterior gonopod angiocoxite with a globule, but without process in posterior view. Posterior gonopod coxal part with a long lateral branch (lb) curved mesally and somewhat anteriad. Near midway the branch supplied with a pointed, spiniform, anteriad directed process (bp) ( Fig. 28 ). Basal part of this branch fused with both colpocoxite and anterior angiocoxite.

Angiocoxite depressed centrally in anterior view ( Fig. 28 ), supplied with a long process (ap); distal portion of this process penetrating colpocoxite and visible outside in caudolateral view. Posterior gonopod telopodite 2-segmented; femur short and thin.

Female. Body with 32 segments. Length about 17 mm, width with paraterga about 1.3 mm. At least 26 ocelli. Nonsexual characters as in male. Vulvae not dissected.

Name: The specific epithet refers to the lateral coxal branch of the posterior gonopod supplied with an anterior, pointed, spiniform process; a noun in apposition.

Figures

FIGURES 26 – 28. Tokyosoma spinifer sp. nov., male holotype. 26, coxa and trochanter 10, front view; 27, gonopods, caudal view; 28, gonopods, front view; e, edge of posterior gonopod colpocoxite sheath; b, rounded blade of the posterior gonopod colpocoxite; c, distal processes of posterior gonopod colpocoxites; ms, mesal sheath processes of posterior gonopod colpocoxites; lp, lateral sheath process of posterior gonopod colpocoxite; lb, posterior gonopod lateral coxal branch; bp, process of the posterior gonopod lateral coxal branch; ap, anterior process of posterior gonopod angiocoxite. Scale in mm.

FIGURES 33 – 37. Tokyosoma serratum sp. nov., male paratype (33); Tokyosoma taroko sp. nov., male holotype (34); Tokyosoma distinctum sp. nov., male paratype (35). Tokyosoma cornutum sp. nov., male holotype (36); Tokyosoma spinifer sp. nov., male holotype (37). Habitus in lateral view. Numerous macrochaetae broken off. Photographed not to scale.