Catharosoma ibirapuitense, Rodrigues & Golovatch & Ott & Ro- Drigues, 2020

Rodrigues, Patrícia E. S., Golovatch, Sergei I., Ott, Ricardo & Ro- Drigues, Everton N. L., 2020, Three new species of the millipede genus Catharosoma Silvestri, 1897 from southern Brazil, with new records and a clarified identity of Catharosoma intermedium (Carl, 1902) (Diplopoda: Polydesmida: Paradoxosomatidae), Zootaxa 4751 (1), pp. 119-130 : 127-128

Catharosoma ibirapuitense new species

Figs 26–31

Type material: Male holotype from Santana do Livramento, APA do Ibirapuitã (55°33’49”W, 30°37’19”S), Rio Grande do Sul, Brazil, 15.VIII. 2012, Equipe MCN leg. ( MCN 1469), Paratypes: two females, same data as the holotype ( MCN 1470).

Diagnosis: Catharosoma ibirapuitense n. sp. resembles C. mahnerti Golovatch, 2005 (see Golovatch 2005a: 814, fig 17) by the shape of the parabasal lobe (p) of the solenophore which is strongly unciform, but differs by the solenophore which is larger, with its distal portion not being slender and unciform as in C. mahnerti .

Description: Male holotype (Figs 26, 27). Length 24 mm and maximum width of midbody of body rings 2.3 mm. Coloration in alcohol: generally light brown with a yellowish longitudinal dorsal line. Legs and antennae yellowish brown. Legs densely setose, relatively long, tibiae swollen ventrally and with brushes starting in leg pair 9 until three last pairs. Male coxae of leg pair 2 with a prominent gonapophysis. Antennae densely setose, relatively long, in situ reaching behind body ring 3 dorsally. Frons and clypeus smooth and setose. Integument smooth and shining. Ozopores lateral, poorly visible. Limbus thin, caudal margin entire. Paraterga strongly reduced, arcuate sulci on body rings 2–4, missing posteriorly thereafter. Epiproct pointed, rather long, with a pair of dorsal and ventral spinnerets. Hypoproct subtriangular and relatively short. Sternal structures of male (Fig. 28). Sternum between coxae of leg pair 3 with a paramedian pair of setal bunches. Sternum between coxae of leg pair 4 with a long, linguiform, anteriad directed process. Between coxae of leg pair 5 a subtrapezoidal process with paramedian tufts of setae in each side. Sternum between coxae of leg pair 6 with two circular paramedian processes with tufts of short setae directed anteriad. Between coxae of leg pair 7 tuft of short setae directed posteriad. Postgonopodal sterna with paramedian spines. Gonopods (Figs 29–31) complex, subcircular. Gonocoxite subcylindrical and long; a densely setose prefemoral portion longer than femorite. Postfemoral portion shorter than solenophore (sph), the latter with a characteristic, strongly unciform, parabasal lobe (p).

Female. General coloration as in male. Length 25 mm and maximum width of midbody 2.6 mm. Paramedian cones on postgonopodal sterna as in male.

Distribution: The species is known only from the type locality.

Etymology: The specific name is an adjective in neuter gender, derived from the type locality, Ibirapuitã.