Riotintobolus, Wesener & Enghoff & Sierwald, 2009

Wesener, Thomas, Enghoff, Henrik & Sierwald, Petra, 2009, Review of the Spirobolida on Madagascar, with descriptions of twelve new genera, including three genera of ' fire millipedes' (Diplopoda), ZooKeys 19 (19), pp. 1-128 : 50-51

Key to the Riotintobolus species:

1 Tarsal pads absent ( Fig. 27F ). Eyes with 20 or less ocelli ( Figs 26A , 27E ). Anal valves with a deep groove between anterior half and sharp-edged lips ( Figs 26B , 27G ) ......................................................................................... 2

– At least male legs 3–7 with tarsal pads ( Fig. 29C ). Eyes with more than 25 ocelli. Anal valves with neither a groove, nor sharp-edged lips ( Figs 28A , 29A ) .......................................................................................................... 3

2 Specimens 35–43 mm long. Colour laterally black, dorsally with a thick, light brown stripe ( Fig. 24A ). Telopodite of posterior gonopod laterally with one large and second small finger-shaped process ( Fig. 26M )........ R. mandenensis sp. n.

– Specimens shorter than 25 mm. Colour laterally black, dorsally with a thick, red stripe ( Fig. 27A ). Telopodite of posterior gonopod laterally with two large finger-shaped processes of equal size ( Fig. 27K )................. R. minutus sp. n.

3 Telson with an elongated, protruding preanal process, lips on anal valves well-developed ( Fig. 28A ). Only male legs 3–7 with tarsal pads. Apical mem- brane on posterior gonopod weakly developed ( Fig. 28G ). Telopodite at mesal margin with a suspicious horn ( Fig. 28F ). Colour brown-blackish with a conspicuously wide light brown stripe.................................. R. aridus sp. n.

– Telson preanal process not protruding, lips on anal valves weakly developed ( Fig. 29A ). Male legs three and beyond with tarsal pads ( Fig. 29C ). Apical membrane on posterior gonopod large, widely protruding ( Fig. 29F ). Colour light grey, posterior margin of rings dark grey, dorsally with a conspicuous, wide blood-red stripe ..................................................... R. anomalus sp. n.

Figures

Figure 24. A Riotintobolus mandenensis sp. n., living specimens B pseudosteppe and burned shrubs dominating the area between the littoral forests of Mandena and Sainte Luce, SE Madagascar C Sainte Luce littoral forest, manioc plantation and destroyed trees inside conservation zone S8.

Figure 26. Riotintobolus mandenensis sp. n., A, B, I–M male holotype, C–H female paratype. A head, lateral view B telson C head, detail of incisura lateralis D head, frontal view E second leg with vulva F gnathochilarium, overview G gnathochilarium, detail of mentum H left mandible, mesal view I anterior gonopod, anterior view Į left posterior gonopod, anterior view K anterior gonopod, posterior view L telopodite of left posterior gonopod, posterior view M left posterior gonopod, overview, posterior view. 3iT = 3-combed internal tooth; av = anal valves; Co = collum; Cx = coxite; eT = external tooth; Gn = gnathochilarium; Gr = groove; IL = incisura lateralis; L = ledge; LL = lamella linguales; LT = lateral tooth; Md = mandible; Me = mentum; mp = molar plate; pL = pectinate lamella; Pre = preanal ring; sf = setiferous foveolae; St = sternite; ST = stipites; sub = subanal scale; T = telopodite; Vu = vulva. Scale bars = 1 mm.

Figure 27. Riotintobolus minutus sp. n., A–E female paratype(s), F–K male holotype. A two living specimens B habitus C gnathochilarium, overview; D midbody ring with leg pair E head, detail of incisura lateralis F legs 1–5, ventral view G telson H anterior gonopod, anterior view I left posterior gonopod, anterior view Į anterior gonopod, posterior view K left posterior gonopod, posterior view. av = anal valves; Co = collum; Cx = coxite; d-g = ozopores; Gr = groove; IL = incisura lateralis; L = ledge; Md = mandible; Pe = “penes”; Pre = preanal ring; St = sternite; T = telopodite; Te = telson. Scale bars = 1 mm.

Figure 28. Riotintobolus aridus sp. n., male holotype, A telson B left antenna C left midbody leg D anterior gonopod, anterior view E anterior gonopod, posterior view F posterior gonopods, anterior view G posterior gonopods, posterior view.av = anal valves; Cx = coxite; ho = horn; Md = mandible; Pre = preanal ring; St = sternite; T = telopodite. Scale bars = 1 mm.

Figure 29. Riotintobolus anomalus sp. n., A–C, male (MNHN), D–G male holotype, A telson B right antenna C left midbody leg D anterior gonopod, anterior view E anterior gonopod, posterior view F posterior gonopods, anterior view G posterior gonopods, posterior view. av = anal valves; Cx = coxite; Md = mandible; Pre = preanal ring; St = sternite; sub = subanal scale; T = telopodite. Scale bars = 1 mm.