Arthrosolaenomeris saci, Bouzan & Iniesta & Brescovit, 2021

Bouzan, Rodrigo Salvador, Iniesta, Luiz Felipe M. & Brescovit, Antonio Domingos, 2021, Cladistic analysis and taxonomic review of the millipede tribe Arthrosolaenomeridini Hoffman, 1976 (Polydesmida: Chelodesmidae), Zootaxa 4970 (2), pp. 201-256: 216

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Arthrosolaenomeris saci

n. sp.

Arthrosolaenomeris saci   n. sp.

Figures 6 View FIGURE 6 , 10E–F View FIGURE 10 , 11 View FIGURE 11

Type material. Male holotype from Bonito (21°07’16”S, 56°28’55”W), Mato Grosso do Sul, Brazil, 14–23.X.2002, Equipe Biota coll., deposited in IBSP 2571 View Materials . Paratypes: four males and one female GoogleMaps   with the same data of the holotype, deposited in IBSP 2577 View Materials (female), IBSP 2568 View Materials (two males) and IBSP 2581 View Materials (two males) GoogleMaps   .

Additional material. BRAZIL: Mato Grosso do Sul: Bonito (21°07’16”S, 56°28’ 55”W), 1♂, 1♀ and one juvenile, 14.X.1993, A. Eterovic coll. ( IBSP 1148 View Materials ); GoogleMaps   Miranda (20°14’01”S, 56°21’59”W), Fazenda Cayman, 1♂, X.1992, A. Eterovic coll. ( IBSP 7538 View Materials ) GoogleMaps   .

Diagnosis. Adult males differ from all other species of the genus by the combination of the following characters: presence of indentations in the prefemoral process ( Fig. 6D View FIGURE 6 ) and presence of a conspicuous groove in the apex of the prefemoral process ( Fig. 6D View FIGURE 6 ).

Description. Male (Holotype, IBSP 2571). Coloration (long-preserved in 70% ethanol): Head ocher, with brownish spots. Antennae ocher becoming more whitish along each antennomere towards the apex, the seventh antennomere totally brownish. Body reddish brown ( Figs 6A–C View FIGURE 6 ). In the anterior segments the posterior portion of the metazonite is ochre and the edge of the paranota with the same coloration as the body, except for the slightly clearer peritremata. Legs ochre. Telson reddish brown. Total length: 64.22. Total width: 10.09. Collum, length 2.52, width, 9.54. Antennomere lengths (1>7): 0.69; 1.87; 1.92; 1.64; 1.68; 1.40; 0.32. Podomeres lengths (1>7): 1.00; 1.41; 2.69; 1.49; 1.81; 1.85; 0.60. Gonopod aperture, length 1.80, width 3.27. Telson, length 1.31. Gonopod: length 2.97, width 2.19. Gonocoxae: length 1.02, width 1.34. Telopodite: length 2.84, width 0.84. Prefemoral region 1/3 the size of telopodite. Prefemoral process ( Figs 6D–E View FIGURE 6 ) long, presenting a dorso-basal lobe, starting from an angle of 135°, ascending parallel to the solenomere and partially covering it in mesal view, in the middle part of the process it presents a long secondary process with dagger-shape, with a series of indentations above the secondary process ( Fig. 6D View FIGURE 6 ). The terminal part presents a conspicuous concavity, the process ending in an acute apex ( Fig. 6D View FIGURE 6 ). Solenomere long and narrow ( Fig. 6F View FIGURE 6 ). Cingulum positioned centroposteriorly ( Fig. 6F View FIGURE 6 ). Apex of the solenomere acute and abruptly descending ( Figs 6D, F View FIGURE 6 ).

Female (Paratype, IBSP 2577). Body as in male. Total length: 56.58. Total width: 9.15. Epigyne triangular shaped. Vulva ( Fig. 10E–F View FIGURE 10 ): length 1.35, width 0.68. External valve: length 0.91, width 0.32. Internal valve: length 0.90, width 0.34. Operculum: length 0.50, width 0.55.

Distribution. Mato Grosso do Sul, Brazil ( Fig. 11 View FIGURE 11 ).

Etymology. The species epithet refers to the Brazilian folkloric character “Saci”. According to the indigenous legend, Saci is a boy with only one leg, characterized by his antics, who smokes a pipe and carries a red cap. Noun in apposition.