Arthrosolaenomeris chapadensis Schubart, 1943

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 : 213

Arthrosolaenomeris chapadensis Schubart, 1943

Figures 4 , 10A–B , 11

Arthrosolaenomeris chapadensis Schubart, 1943: 144 , 160, 161, figs 28−38. Male holotype from Indubrasil, Campo Grande (20°26’34”S, 54°38’47”W), Mato Grosso do Sul, Brazil, 17.X.1938, Instituto Osvaldo Cruz coll., deposited in MZSP 1092, examined. Paratypes: one male from Camapuã (19°31’54”S, 54°02’37”W), Mato Grosso do Sul, Brazil, X.1938, Camargo coll., deposited in MZSP 1090 and two males from Porto Murtinho (21°41’56”S, 57°52’56”W), Mato Grosso do Sul, Brazil, XII.1929, R. Spitz coll. deposited in MZSP 522 and 536, respectively, examined; Schubart, 1958: 238; Hoffman, 1976; 177; Golovatch, Hoffman, Adis, Marques, Raizer, Silva, Ribeiro, Silva and Pinheiro, 2005: 276.

Additional material. BRAZIL: São Paulo: Rosana (22°34’47”S, 53°03’32”W), Usina Hidrelétrica Engenheiro Sérgio Motta (Porto Primavera), 1♂, 1♀ and one juvenile, 1999–2000, Equipe Butantan coll. ( IBSP 1049 ) .

Diagnosis. Adult males differ from other species of the genus by the combination of the following characters: presence of indentations in the prefemoral process ( Fig. 4D ) and absence of a conspicuous groove in the apex of the prefemoral process ( Fig. 4D ).

Description. Male (Holotype, MZSP 1092). Coloration (long-preserved in 70% ethanol): Head and antennae ocher. Body ocher and paranota tip with the same color as the body ( Figs 4A–C ). Legs ocher. Telson ocher. Total length: 65.98. Total width: 10.02. Collum, length 3.10, width 9.33. Antennomere lengths (1>7): 0.71; 1.91; 1.82; 1.62; 1.56; 1.51; 0.39. Podomeres lengths (1>7): 1.03; 1.60; 2.78; 1.52; 1.96; 1.97; 0.68. Gonopod aperture, length 1.98, width 3.35. Telson, length 0.77. Gonopod: length 2.86, width 2.07. Gonocoxae: length 1.11, width 1.02. Telopodite: length 2.77, width 1.00. Prefemoral process long (greater than or equal to the solenomere) and narrow ( Figs 4D–F ). Presence of a large secondary process positioned in its medial portion ( Fig. 4D ). Posterior portion to the secondary process with several indentations. Solenomere long and narrow ( Fig. 4E ). Cingulum positioned centroposteriorly ( Fig. 4F ). Apex of the solenomere abruptly descending ( Fig. 4D ).

Female (IBSP 1049). Body as in male. Total length: 57.60. Total width: 9.35. Antennomere lengths (1>7): 0.87; 1.72; 1.54; 1.36; 1.37; 1.38; 0.33. Podomeres lengths (1>7): 0.82; 1.26; 2.62; 1.04; 1.12; 1.63; 0.55. Telson, length 1.38. Epigyne rectangular shaped. Vulvae ( Figs 10A–B ): length 1.34, width 0.68. External valve: length 0.98, width 0.34. Internal valve: length 0.94, width 0.28. Operculum: length 0.39, width.0.56.

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

Figures

FIGURE 4. Arthrosolaenomeris chapadensis Schubart, 1943 (holotype, MZSP 1092), dorsal views of anterior (A), midbody (B) and posterior (C) body rings. Scale bars: 2 mm. Left gonopod. (D), mesal view; (E), ventral view; (F), ectal view. Scale bars: 1 mm. Abbreviations: C, cingulum; PfP, prefemoral process; S, solenomere; SPr, secondary process of the prefemoral process.

FIGURE 10. Left vulva. Arthrosolaenomeris chapadensis Schubart, 1943 (IBSP 1049): (A), ventral view; (B), lateral view. Arthrosolaenomeris pantanalensis Schubart, 1943 (CZUFMT 847): (C), ventral view; (D), lateral view. Arthrosolaenomeris saci n. sp. (paratype, IBSP 2577): (E), ventral view; (F), lateral view.Arthrosolaenomeris iara n. sp. (paratype, IBSP 7537). (G), ventral view; (H), lateral view. Scale bars: 0,5 mm. Abbreviations: EV, external valve; IV, internal valve; Op, operculum.

FIGURE 11. Distribution map of Arthrosolaenomeris Schubart, 1943 species.