Colossobolus aculeatus Wesener,

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: 35-37

publication ID 10.3897/zookeys.19.221

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Colossobolus aculeatus Wesener

sp. n.

Colossobolus aculeatus Wesener  , sp. n.

Material examined: 2 ♂ Holotype: 1 ♂ (122 mm long), CAS BLF 9555, Madagascar, Province Antsiranana, Forêt de Binara , 7.5 km 230° SW Daraina, 375 m, tropical dry forest, 13°15’18”S, 049°37’00”E, leg. B. L. Fisher, 1.XII.2003GoogleMaps  . Paratype: 1 ♂, same data as holotypeGoogleMaps  .

Similar species: the special U-shaped posterior gonopods are unique for Colossobolus  except for C. pseudoaculeatus  sp. n. C. aculeatus  differs from the latter in the presence of a sharp-ending preanal process, which is well-rounded in C. pseudoaculeatus  sp. n. (compare Fig. 20CView Figure 20 with Fig. 21BView Figure 21). The lateral branch of the posterior gonopod telopodite is of equal width all along in C. aculeatus  while it is basally slen- der with a swollen tip in C. pseudoaculeatus  sp. n. (compare Fig. 20EView Figure 20 with Fig. 21EView Figure 21).

Description. Measurements: males with 51 body rings, circa 122 mm long, 9.5 mm wide. Female unknown.

Coloration affected by alcohol. Head, antennae, legs and telson red ( Figs 20View Figure 20 A–C). Median part of collum dark, margins red ( Fig. 20AView Figure 20). Pro- and anterior part of mesozonites dark brown, posterior part of meso- and metazonites red. Antennae protruding back to ring 3. Male coxal processes on coxae 3 and 4 barely visible, on coxae 5–7 absent ( Fig. 20BView Figure 20). Preanal process sharp-edged, but not projecting over anal valves ( Fig. 20CView Figure 20).

Anterior gonopod sternite elongated into a wide, broadly rounded lobe ( Fig. 20DView Figure 20). Mesal process of coxite weakly developed, protruding into a very short wide lobe with

a well-rounded tip. Lobe only slightly longer than sternite ( Fig. 20DView Figure 20). Telopodite process long, becoming apically thicker than basally. Mesal margin laterally sharp, not projecting ( Fig. 20FView Figure 20).

Posterior gonopods telopodites positioned parallel to one another, generally Ushaped ( Figs 20E, GView Figure 20). Coxite branch absent ( Fig. 20EView Figure 20). Lateral branch of regular width, tip wide, well-rounded, not thicker than median or basal parts ( Fig. 20EView Figure 20). Central membranous area present as a wide, well-rounded knob ( Fig. 20GView Figure 20). Main branch slightly longer than lateral branch, latero-apically towards lateral branch with a large membranous area (Fig, 20G).

Distribution and ecology: C. aculeatus  is only known from the Forêt Binara ( Fig. 10View Figure 10) where it occurs in close proximity to C. semicyclus  .

Etymology: aculeatus  , adjective, refers to the sharp-edged preanal process, unique for Colossobolus  .