urn:lsid:zoobank.org:act: 2C06B20E-C62D-4CAE-9030-0761193A9DE9

Material examined: 1 ♂ Holotype: 1 ♂ (119 mm long), ZSM FGZC 1847, Madagascar, Province Antsiranana, Forêt d’Ambre, Provate Reserve Le Fontenay, leg. Köhler and Franzen, 26.II.2008.

Differential diagnosis: the anterior and posterior gonopods of C. pseudoaculeatus sp. n. can only be confused with those of C. aculeatus. See the latter for a list of the characters distinguishing these two species.

Description. Measurements: male with 49 body rings, circa 119 mm long, 9.55 mm wide. Female unknown.

Coloration affected by alcohol. Head, antennae, legs and telson red (Figs 21A, B). Median part of collum dark, margins red (Fig. 21A). Body rings anteriorly dark brown, posteriorly wine-red. Antennae protruding back to ring 4. Male coxal processes present on coxae 3 and 4, on coxae 5–7 absent. Preanal process well-rounded, not projecting over anal valves (Fig. 21B).

Anterior gonopod sternite elongated into a wide, broadly rounded lobe (Fig. 21D). 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. 21D). Telopodite process long and well-rounded, apically thicker than basally. Mesal margin laterally sharp, not projecting (Fig. 21C).

Posterior gonopods telopodites positioned parallel to one another, generally Ushaped (Figs 21E, F). Coxite branch absent (Fig. 21E), lateral branch basally slender, width apically increasing (Figs 21E, F); tip swollen, slightly curved mesally (Fig. 21E). Central membranous area present as a wide, well-rounded knob (Fig. 21E). Main branch slightly shorter than lateral branch, latero-apically towards lateral branch with a large membranous area (Figs 21E, F).

Distribution and ecology : C. pseudoaculeatus is only known from the Forêt d’Ambre (Fig. 10).

Etymology: pseudoaculeatus, adjective, refers to the close similarity of the species to Colossobolus aculeatus.