Colossobolus minor Wesener, 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 : 30-31

publication ID 10.3897/zookeys.19.221

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Colossobolus minor Wesener

sp. nov.

Colossobolus minor Wesener View in CoL , sp. n.

Material examined: 5 ♂ Holotype: 1 ♂ (86 mm long), CAS BLF 9429-A, Madagascar, Province Antsiranana, Forêt d’Analabe, 30.0 km 72° ENE Daraina , 30 m, littoral rainforest, 13°05’00” S, 049°54’30” E, leg. B. L. Fisher, 27.XI.2003 GoogleMaps . Paratypes: 4 ♂, same data as holotype GoogleMaps .

Differential diagnosis: the small size, dark body ring colour and uniquely-shaped, overlapping posterior gonopods of C. minor identify this species unambiguously.

Description. Measurements: males with 47 body rings, 84–100 mm long, 8.6–9.4 mm wide. Females unknown.

Coloration affected by alcohol. Head, antennae, legs and telson red ( Figs 16A, B View Figure 16 ). Pro- and mesozona dark brown, posterior half of metazona red. Antennae protruding back to ring 3. Male coxal processes on coxae 3–5 weakly developed, on coxae 6 and 7 barely visible ( Fig. 16A View Figure 16 ). Preanal process well-rounded ( Fig. 16B View Figure 16 ).

Anterior gonopod sternite elongated into a wide, broadly rounded lobe ( Fig. 16C View Figure 16 ). Mesal process of coxite weakly developed, protruding into a short, wide lobe with a well-rounded tip ( Fig. 16C View Figure 16 ). Telopodite basally with a groove ( Fig. 16D View Figure 16 ). Telopodite process long and well-rounded. Mesal margin laterally sharp-edged, at midpoint slightly protruding ( Fig. 16D View Figure 16 ).

Posterior gonopod telopodites positioned face-to-face to one another. Coxite branch absent ( Fig. 16E View Figure 16 ), lateral branch of telopodite straight, tapering ( Fig. 16E View Figure 16 ). Central membranous area present as a short, wide, well-rounded lobe ( Fig. 16E View Figure 16 ). Main branches of both posterior gonopods overlapping each other ( Figs 16E, F View Figure 16 ). Main branch shorter than lateral branch, former at half of its length dividing into two parts, a mesal sclerotized finger-shaped process and a lateral wider membranous part ( Figs 16E, F View Figure 16 ). Finger-shaped processes of both posterior gonopods overlap each others membranous parts ( Fig. 16E View Figure 16 ).

Distribution and ecology: C. minor is only known from the littoral forest of Analabe ( Fig. 10 View Figure 10 ), occurring sympatric with the larger C. oblongopedus .

Etymology: minor , adjective, refers to the small size of the species. Colossobolus minor is the smallest known species of the genus.

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