Arthrosolaenomeris Schubart, 1943

Arthrosolaenomeris Schubart, 1943: 143 .

Type species: A. chapadensis Schubart, 1943, by original designation; Schubart, 1958: 205; Schubart, 1960: 453; Jeekel, 1971: 249; Hoffman, 1976: 177; Hoffman, 1980: 151.

Diagnosis. Males of Arthrosolaenomeris differ from those of other Arthrosolaenomeridini genera by the combination of the following characters: rectangular ventral projections in the post-gonopodal sternites (Fig. 30E) (acuminated in A. curupira n. sp. and A. caipora n. sp.); posterior edge of the gonopod aperture with a small dentiform process; presence of a secondary process in medial portion in the prefemoral process of the gonopod (Fig. 4D–F) (absent in A. iara n. sp.); presence of a rounded extension of the gonocoxae, in oral view (Fig. 32D); and apex of the solenomere abruptly descending (Fig. 4D).

Description. General characters: Body length between 47.78 mm ( A. caipora n. sp.) and 69.42 mm ( A. iara n. sp.). Coloration (specimens long preserved in 70% ethanol) variable between species, ranging from ocher to reddish brown, paranota tip and posterior border of the metaterga slightly whitish (some specimens of A. pantanalensis show a purple coloration for the whole body). Gnathochilarium: lingual plate covered by several setae; mentum centrally covered by setae, with smooth edges and stipes covered by thick setae (sparsely covered in A. curupira n. sp. and A. caipora n. sp.). Body rings: cuticle slightly rough; alignment of paranota in posterior view curved ventrally (straight in A. caipora n. sp.). Sternite of the fourth segment with a pair of projections, sternite of the fifth segment with two pairs of projections covered with setae. Sternite of sixth body ring with two pairs of ventral projections; seventh body ring with a pair of ventral projections (absent in A. chapadensis) and post-gonopodal sternites with two pairs of rectangular ventral projections (acuminate in A. curupira n. sp. and A. caipora n. sp.). Paranota form: round to slightly rectangular (Figs 4B, 8B). Legs: podomeres with several thick ventral setae (Fig. 31A) and granules in the tibia and tarsus (Fig. 31F) (except in A. curupira n. sp. and A. caipora n. sp.), dorsal lobe of prefemur conspicuous of the anterior legs (Fig. 31A) and a ventroapical projection in the prefemur of the post-gonopod legs (Fig. 31E).

Male characters: Leg pair of the third body ring with the coxae presenting the rectangular genital papilla. Gonopod aperture on seventh body ring with the posterior margin excavated and with a small process. Gonopods: gonocoxae equivalent to about half the length of the telopodite, cylindrical, without a spiniform process. Prefemoral process (Figs 4D–F): elongate with a dorso-basal process and a secondary process in its medial portion (long in A. chapadensis, A. pantanalensis, A. saci n. sp., A. iara n. sp. and short in A. curupira n. sp., A. caipora n. sp.). Cingulum in an apical position (Fig. 4F) (middle position in A. caipora n. sp.). Solenomere long and thin with its apex abruptly descending (Fig. 4D–F).

Female characters: Vulvae: oval-shaped, having equal proportions in lateral view, with an operculum advanced (Figs 10A–B).

Distribution. States of Mato Grosso, Mato Grosso do Sul and São Paulo (Fig. 11).

Composition. Arthrosolaenomeris chapadensis Schubart, 1943; A. pantanalensis Schubart, 1943; A. saci n. sp.; A. curupira n. sp.; A. caipora n. sp.; A. iara n. sp.